NEET MCQs Practice | Chapter 9 Biomolecules | Biology Class 11
Here You Get So Many MCQs Questions Based On NEET Of Class 11 Biology, Chapter 9, BiomoleculesIf You Want To Read Our Quality Notes Of Chapter 9, Biomolecules, Click Here 🥰1. Biomolecules mainly consist of which elements?
a) Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulfur (Correct)
b) Sodium, Calcium, Iron, Chlorine
c) Helium, Neon, Argon
d) Zinc, Copper, Magnesium
2. Biomolecules are essential because they:
a) Provide colour to organisms
b) Carry out biological functions (Correct)
c) Convert metals to non-metals
d) Form only genetic material
3. Which of the following is not a major type of biomolecule?
a) Carbohydrates
b) Lipids
c) Proteins
d) Vitamins (Correct)
4. What is the primary function of carbohydrates?
a) Store genetic information
b) Provide energy (Correct)
c) Form cell membranes
d) Act as hormones
5. Proteins mainly perform which role?
a) Genetic storage
b) Structural and functional roles (Correct)
c) Energy storage
d) Water regulation
6. Lipids serve as:
a) Components of cell membranes and energy storage molecules (Correct)
b) Catalysts of all metabolic reactions
c) Main transporters of oxygen
d) Producers of hormones only
7. Nucleic acids are responsible for:
a) Transporting minerals
b) Storing and transferring genetic information (Correct)
c) Digestion of fats
d) Fluid balance in cells
8. Glucose is an example of:
a) A large macromolecule
b) A simple small biomolecule (Correct)
c) A lipid
d) A protein
9. DNA is composed of many:
a) Fatty acids
b) Amino acids
c) Nucleotides (Correct)
d) Monosaccharides
10. Elemental analysis of living tissues and earth’s crust gives:
a) Totally different elements
b) Mostly similar list of elements (Correct)
c) No common elements
d) Only metals in living tissues
11. What key difference exists between living and non-living matter according to the text?
a) Only living beings have oxygen
b) Elements differ completely
c) Relative amount of carbon and hydrogen is higher in living organisms (Correct)
d) Non-living matter has more proteins
12. What does the higher proportion of carbon and hydrogen in living organisms indicate?
a) They are heavier than non-living matter
b) They have identical structure to rocks
c) Element type changes every day
d) These proportions influence structure and function of living beings (Correct)
13. Living tissues are ground in trichloroacetic acid mainly to:
a) Form a thick slurry for chemical analysis (Correct)
b) Remove all proteins
c) Convert compounds into glucose
d) Produce DNA fragments
14. The filtrate obtained after straining the slurry is known as:
a) Acid-insoluble fraction
b) Acid-soluble pool (Correct)
c) Protein extract
d) Mineral residue
15. The retentate left after filtration is called:
a) Acid-soluble pool
b) Acid-insoluble fraction (Correct)
c) Organic solvent
d) Ash content
16. Thousands of organic compounds found in the acid-soluble pool are collectively called:
a) Inorganic materials
b) Biomolecules (Correct)
c) Minerals
d) Vitamins
17. Complete burning of tissue leaves behind:
a) CO₂ and proteins
b) Carbohydrates and water
c) Only water
d) Ash containing inorganic elements (Correct)
18. Ash primarily contains:
a) DNA and RNA
b) Sugars and amino acids
c) Calcium, magnesium, sulfates, and phosphates (Correct)
d) Lipids and proteins
19. Elemental analysis helps in identifying:
a) Functional groups
b) Exact molecular structure
c) Types and amounts of elements present (Correct)
d) Ash color
20. Compound analysis helps in:
a) Measuring water content
b) Identifying organic and inorganic constituents (Correct)
c) Determining melting point
d) Measuring pH levels
21. From a chemistry perspective, compounds in tissues are identified based on:
a) Cell shape
b) Functional groups like aldehydes and ketones (Correct)
c) Organism type
d) Color of tissue
22. From a biological perspective, organic compounds are classified as:
a) Metals and non-metals
b) Salts and gases
c) Amino acids, nucleotide bases, fatty acids (Correct)
d) Vitamins only
23. When tissue is dried to remove water, the resulting mass is called:
a) Ash content
b) Filtrate
c) Dry weight (Correct)
d) Wet weight
24. The purpose of grinding tissue with a mortar and pestle is to:
a) Increase dry weight
b) Break cells and release their contents for analysis (Correct)
c) Remove inorganic elements
d) Heat the tissue
25. Amino acids are called α-amino acids because:
a) They have two carboxyl groups
b) Amino and carboxyl groups are attached to β-carbon
c) Amino and carboxyl groups are attached to the same α-carbon (Correct)
d) They contain an aromatic ring
26. Which four substituents are attached to the α-carbon of an amino acid?
a) Hydrogen, amino group, phosphate group, R group
b) Hydrogen, amino group, carboxyl group, R group (Correct)
c) Amino group, sulfate group, hydroxyl group, R group
d) Two hydrogen atoms, amino group, R group
27. Glycine has which group as its R group?
a) Methyl group
b) Hydroxy-methyl group
c) Hydrogen (Correct)
d) Benzene ring
28. Alanine contains which R group?
a) Hydrogen
b) Methyl group (Correct)
c) Hydroxy-methyl group
d) Ethyl group
29. Serine contains which characteristic R group?
a) Hydroxy-methyl group (Correct)
b) Benzyl group
c) Amino group
d) Carboxyl group
30. The chemical properties of amino acids mainly depend on:
a) Only amino group
b) Only R group
c) Amino group, carboxyl group, and R group (Correct)
d) Only carboxyl group
31. Glutamic acid is classified as:
a) Basic amino acid
b) Neutral amino acid
c) Aromatic amino acid
d) Acidic amino acid (Correct)
32. Lysine is an example of:
a) Acidic amino acid
b) Basic amino acid (Correct)
c) Aromatic amino acid
d) Neutral amino acid
33. Valine is a:
a) Basic amino acid
b) Neutral amino acid (Correct)
c) Acidic amino acid
d) Sulfur-containing amino acid
34. Aromatic amino acids include:
a) Valine, leucine, isoleucine
b) Glutamic acid, aspartic acid
c) Tyrosine, phenylalanine, tryptophan (Correct)
d) Glycine, serine, cysteine
35. A unique property of amino acids is that they can:
a) Melt at room temperature
b) Conduct electricity like metals
c) Ionize depending on pH (Correct)
d) Form only basic solutions
36. Ionization of amino acids means:
a) They become radioactive
b) –NH₂ and –COOH groups gain or lose ions (Correct)
c) R group breaks down
d) They convert into fatty acids
37. Lipids are generally:
a) Soluble in water
b) Insoluble in water (Correct)
c) Soluble only in acids
d) Soluble only in bases
38. Fatty acids contain a carboxyl group attached to:
a) A phosphate group
b) A sulfur group
c) A variable R group (Correct)
d) A benzene ring
39. The R group in fatty acids may consist of:
a) 1 to 19 carbons (Correct)
b) Only 1 to 3 carbons
c) Only aromatic rings
d) Only nitrogen-containing groups
40. Palmitic acid contains how many carbons?
a) 10
b) 12
c) 16 (Correct)
d) 20
41. Arachidonic acid contains:
a) 12 carbons
b) 14 carbons
c) 18 carbons
d) 20 carbons (Correct)
42. Saturated fatty acids are those that:
a) Have one C=C double bond
b) Have multiple triple bonds
c) Have no double bonds (Correct)
d) Have only aromatic rings
43. Unsaturated fatty acids contain:
a) Only single bonds
b) C=C double bonds (Correct)
c) No carbon atoms
d) Only triple bonds
44. Glycerol is chemically known as:
a) Trihydroxy propane (Correct)
b) Dihydroxy methane
c) Hydroxyethane
d) Propanoic acid
45. Fatty acids combine with glycerol to form:
a) Peptides
b) Nucleotides
c) Mono-, di-, and triglycerides (Correct)
d) Starches
46. Fats and oils differ mainly in their:
a) Genetic code
b) Melting point (Correct)
c) pH value
d) Ionization ability
47. Oils remain liquid in winters because they:
a) Are highly saturated
b) Have a lower melting point (Correct)
c) Contain no fatty acids
d) Are free of glycerol
48. Lipids containing phosphorus and a phosphorylated compound are called:
a) Carbohydrates
b) Proteins
c) Phospholipids (Correct)
d) Steroids
49. A well-known example of a phospholipid is:
a) Palmitic acid
b) Lecithin (Correct)
c) Glycine
d) Cholesterol
50. Complex lipids are commonly found in:
a) Blood plasma
b) Bones
c) Neural tissues (Correct)
d) Hair follicles
51. Nitrogen bases like adenine, guanine, cytosine, uracil, and thymine contain:
a) Linear carbon chains
b) Heterocyclic rings (Correct)
c) Only aliphatic chains
d) No carbon atoms
52. A nitrogen base attached only to a sugar is known as a:
a) Nucleotide
b) Nucleoside (Correct)
c) Polypeptide
d) Fatty acid
53. When a phosphate group is also attached to the sugar of a nucleoside, it becomes a:
a) Protein
b) Polysaccharide
c) Nucleotide (Correct)
d) Lipid
54. Adenosine and guanosine are examples of:
a) Amino acids
b) Nucleosides (Correct)
c) Carbohydrates
d) Fatty acids
55. Adenylic acid and cytidylic acid are examples of:
a) Sugars
b) Nucleotides (Correct)
c) Enzymes
d) Steroids
56. Nucleic acids like DNA and RNA are made up of:
a) Amino acids
b) Lipids
c) Nucleotides (Correct)
d) Sterols
57. The primary role of nucleic acids in living organisms is to:
a) Provide energy
b) Act as structural proteins
c) Store and transmit genetic information (Correct)
d) Help in fat digestion
58. Uracil is found in which type of nucleic acid?
a) Only DNA
b) Only RNA (Correct)
c) Both DNA and RNA
d) Only lipids
59. Thymine is found in:
a) RNA only
b) Lipids
c) DNA only (Correct)
d) Proteins
60. Nitrogen bases are called heterocyclic because they:
a) Form straight-chain polymers
b) Contain rings with at least one atom other than carbon (Correct)
c) Contain only carbon and hydrogen
d) Are always aromatic
61. Biomolecules isolated from living organisms are often referred to as:
a) Hormones
b) Enzymes
c) Metabolites (Correct)
d) Vitamins
62. Primary metabolites are mainly found in:
a) Plastics
b) Animal tissues (Correct)
c) Rocks
d) Fossils
63. Primary metabolites are those compounds that:
a) Have no biological function
b) Are involved in normal physiological processes (Correct)
c) Are not found in living organisms
d) Are toxic to cells
64. Secondary metabolites are commonly found in:
a) Metals
b) Plastics
c) Plants, fungi, and microbes (Correct)
d) Inorganic rocks
65. Which of the following is a secondary metabolite?
a) Glucose
b) Amino acids
c) Alkaloids (Correct)
d) Starch
66. Flavonoids are examples of:
a) Primary metabolites
b) Secondary metabolites (Correct)
c) Enzymes
d) Hormones
67. Essential oils belong to which category?
a) Proteins
b) Secondary metabolites (Correct)
c) Carbohydrates
d) Nucleic acids
68. Rubber and gums found in plants are:
a) Primary metabolites
b) Secondary metabolites (Correct)
c) Vitamins
d) Fatty acids
69. Antibiotics like penicillin are classified as:
a) Carbohydrates
b) Primary metabolites
c) Secondary metabolites (Correct)
d) Lipids
70. Secondary metabolites differ from primary metabolites because they:
a) Are essential for basic survival of all animals
b) Are produced only in humans
c) Have specialized ecological functions (Correct)
d) Are part of DNA structure
71. Primary metabolites mainly function in:
a) Defence only
b) Growth, development, and reproduction (Correct)
c) Colour production
d) Fragrance formation
72. The functions of many secondary metabolites in the host organism are:
a) Completely known
b) Not important
c) Not fully understood (Correct)
d) Similar to primary metabolites
73. Which of the following is often derived from secondary metabolites?
a) DNA
b) Rubber (Correct)
c) Glucose
d) Water
74. Medicines obtained from plants are generally:
a) Primary metabolites
b) Secondary metabolites (Correct)
c) Vitamins
d) Enzymes
75. Secondary metabolites such as fragrances and pigments are useful for:
a) Industrial cooling
b) Human applications (Correct)
c) Telecommunication
d) Soil erosion
76. Some secondary metabolites play important ecological roles such as:
a) Increasing melting point of oils
b) Helping organisms survive and interact with environment (Correct)
c) Storing genetic information
d) Breaking down enzymes
77. One major difference between primary and secondary metabolites is:
a) Both are required for basic survival
b) Primary metabolites have clear roles; secondary often do not (Correct)
c) Secondary metabolites are always toxic
d) Primary metabolites are found only in microbes
78. Spices obtained from plants are classified as:
a) Structural proteins
b) Primary metabolites
c) Secondary metabolites (Correct)
d) Organic acids
79. Ecological roles of secondary metabolites include:
a) DNA replication
b) Interaction with the environment (Correct)
c) Energy production in mitochondria
d) Enzyme synthesis
80. Pigments present in certain organisms are examples of:
a) Primary metabolites
b) Secondary metabolites (Correct)
c) Monosaccharides
d) Hormones
81. Acid-soluble pool ke compounds ka molecular weight range hota hai:
a) 800–5000 Da
b) 1–10 Da
c) 18–800 Da (Correct)
d) 5000–10000 Da
82. Acid-insoluble fraction me kaun-sa group of compounds milta hai?
a) Vitamins
b) Proteins, nucleic acids, polysaccharides, lipids (Correct)
c) Hormones
d) Monosaccharides only
83. Macromolecules ka molecular weight aam taur par kitna hota hai?
a) 10–50 Da
b) A few hundred Da
c) Tens of thousands of Da (Correct)
d) Less than 100 Da
84. Molecular weight < 1000 Da wale biomolecules ko kya kaha jata hai?
a) Polymers
b) Micromolecules (Correct)
c) Enzymes
d) Hormones
85. Acid-insoluble fraction wale compounds ko kya kaha jata hai?
a) Micromolecules
b) Vitamins
c) Macromolecules (Correct)
d) Electrolytes
86. Lipids acid-insoluble fraction me hone ke bawajood macromolecules nahi hote kyunki:
a) Unka structure polymeric hota hai
b) Unka molecular weight bahut high hota hai
c) Unka molecular weight comparatively low hota hai (Correct)
d) Wo water-soluble hote hain
87. Acid-insoluble fraction me jo compounds milte hain (lipids ke alawa), unki ek common characteristic kya hai?
a) All are monomers
b) All are polymeric substances (Correct)
c) All are aromatic hydrocarbons
d) All are metal complexes
88. Biomolecules are classified into micro- and macromolecules based on:
a) Colour
b) Shape
c) Molecular weight (Correct)
d) Solubility in acids only
89. Polysaccharides, proteins, and nucleic acids kaunsi category me aate hain?
a) Micromolecules
b) Macromolecules (Correct)
c) Vitamins
d) Hormones
90. Acid-soluble pool ke molecules ka ek important feature kya hai?
a) They are always polymers
b) They are all lipids
c) They have low molecular weight (Correct)
d) They contain metals only
- Lipids ko acid-insoluble fraction me kyon include kiya jata hai, jabki unka molecular weight 800 Da se kam hota hai?
a) Kyunki lipids hamesha large macromolecules hote hain — Wrong
b) Kyunki lipids water-soluble hote hain — Wrong
c) Kyunki lipids membrane structure ka hissa hote hain aur grinding ke baad vesicles bana kar acid-insoluble pool me alag ho jaate hain — Correct
d) Kyunki lipids proteins ke saath combine hote hain — Wrong - Tissue grinding ke dauran lipid membranes kis form me convert ho jaati hain?
a) Micelles — Wrong
b) Vesicles — Correct
c) Monomers — Wrong
d) Proteolytic fragments — Wrong - Lipids acid-insoluble fraction me isliye dikhte hain kyunki membrane fragments kaisi hoti hain?
a) Water-soluble — Wrong
b) Protein-soluble — Wrong
c) Water-insoluble — Correct
d) Acid-soluble — Wrong - Acid-insoluble pool me kaun-si cheez galat tarike se ‘macromolecule’ appear hoti hai?
a) Carbohydrates — Wrong
b) Proteins — Wrong
c) Lipids — Correct
d) Nucleic acids — Wrong - Lipids ko macromolecular fraction me rakhe jaane ka asli kaaran kya hai?
a) Unka high molecular weight — Wrong
b) Unka membrane-based structural organization — Correct
c) Unka chemical reactivity — Wrong
d) Unka enzymatic nature — Wrong
- Acid-soluble pool mainly kis cheez ko represent karta hai?
a) Nuclear DNA — Wrong
b) Cytoplasmic composition — Correct
c) Mitochondrial membrane — Wrong
d) Cell wall components — Wrong - Macromolecules cell ke kis part se aate hain?
a) Sirf cell membrane se — Wrong
b) Cytoplasm aur organelles se — Correct
c) Sirf nucleus se — Wrong
d) Sirf vacuole se — Wrong - Acid-soluble aur acid-insoluble fractions milkar kya provide karte hain?
a) Genetic code ka structure — Wrong
b) Proteins ki folding pathway — Wrong
c) Living tissues ki complete chemical composition — Correct
d) Sirf inorganic ion concentration — Wrong - Chemical composition me sabse abundant compound kaun hota hai living organisms me?
a) Proteins — Wrong
b) Water — Correct
c) Lipids — Wrong
d) Vitamins — Wrong - Water ke baad living organisms me kaun si classes ki biomolecules present hoti hain?
a) Sirf inorganic salts — Wrong
b) Sirf proteins — Wrong
c) Organic aur inorganic biomolecules dono — Correct
d) Sirf carbohydrates — Wrong
- Proteins kis cheez se milkar bane hote hain?
a) Fatty acids — Wrong
b) Amino acids ki long chains (polypeptides) — Correct
c) Nucleotides — Wrong
d) Monosaccharides — Wrong - Amino acids ko ek doosre se kaun sa bond jodta hai?
a) Glycosidic bond — Wrong
b) Hydrogen bond — Wrong
c) Peptide bond — Correct
d) Phosphodiester bond — Wrong - Proteins homopolymer kyon nahi hote?
a) Kyunki proteins sirf ek hi monomer se bante hain — Wrong
b) Kyunki proteins me 20 different amino acids hote hain — Correct
c) Kyunki proteins inorganic hote hain — Wrong
d) Kyunki proteins water-soluble nahi hote — Wrong - Homopolymer ki sahi definition kya hai?
a) Multiple types of monomers repeated — Wrong
b) Sirf ek type ka monomer repeat hota hai — Correct
c) Inorganic ions ka chain — Wrong
d) Randomly arranged monomers — Wrong - Heteropolymer kisko kehte hain?
a) Sirf ek monomer ka repetition — Wrong
b) Variety of monomers specific sequence me arranged — Correct
c) Sirf lipids se bana polymer — Wrong
d) Sirf sugars se bana polymer — Wrong - Essential amino acids kahan se milte hain?
a) Body khud banati hai — Wrong
b) Sirf liver banata hai — Wrong
c) Dietary proteins se — Correct
d) Carbohydrates se — Wrong - Collagen kya hai?
a) Plant pigment — Wrong
b) Most abundant animal protein — Correct
c) Insect hormone — Wrong
d) Storage polysaccharide — Wrong - Biosphere me sabse abundant protein kaun sa hai?
a) Hemoglobin — Wrong
b) Myosin — Wrong
c) RuBisCO — Correct
d) Keratin — Wrong - RuBisCO ka main function kya hai?
a) Amino acid synthesis — Wrong
b) Photosynthesis me CO₂ fixation — Correct
c) DNA replication — Wrong
d) Hormone production — Wrong - Proteins ke functional roles me se kaun sa statement sahi hai?
a) Proteins sirf structural molecules hote hain — Wrong
b) Proteins immune system, enzymes, hormones aur transport sab me role play karte hain — Correct
c) Proteins keval food storage ke liye hote hain — Wrong
d) Proteins ka koi role metabolism me nahi hota — Wrong
- Polysaccharides kis se milkar bante hain?
a) Fatty acids — Wrong
b) Monosaccharides ki long chains — Correct
c) Amino acids — Wrong
d) Nucleotides — Wrong - Cellulose kis type ka polymer hai?
a) Heteropolymer — Wrong
b) Homopolymer of glucose — Correct
c) Homopolymer of fructose — Wrong
d) Protein polymer — Wrong - Starch ka main function kya hai?
a) Structural support in animals — Wrong
b) Energy storage in plants — Correct
c) DNA synthesis — Wrong
d) Oxygen transport — Wrong - Animals me energy-storing polysaccharide kaun sa hota hai?
a) Starch — Wrong
b) Cellulose — Wrong
c) Glycogen — Correct
d) Inulin — Wrong - Inulin kis monosaccharide ka polymer hai?
a) Glucose — Wrong
b) Fructose — Correct
c) Galactose — Wrong
d) Ribose — Wrong - Glycogen chain me kis tarah ke ends hote hain?
a) Only reducing ends — Wrong
b) Only non-reducing ends — Wrong
c) One reducing end and many non-reducing ends — Correct
d) Two reducing ends only — Wrong - Starch iodine test me blue colour kis wajah se aata hai?
a) Starch ke linear structure se — Wrong
b) Starch ke helical structure iodine ko trap karta hai — Correct
c) Cellulose ke branching se — Wrong
d) Iodine ke oxidation reaction se — Wrong - Cellulose iodine ko trap kyon nahi kar pata?
a) Kyunki cellulose soluble hai — Wrong
b) Kyunki cellulose me helical structure nahi hota — Correct
c) Kyunki cellulose branched hota hai — Wrong
d) Kyunki cellulose me fructose hota hai — Wrong - Plant cell walls kis polysaccharide se bani hoti hain?
a) Glycogen — Wrong
b) Chitin — Wrong
c) Cellulose — Correct
d) Inulin — Wrong - Arthropod exoskeleton ka main polysaccharide kaun sa hai?
a) Starch — Wrong
b) Chitin — Correct
c) Cellulose — Wrong
d) Glycogen — Wrong - Complex polysaccharides jaise glucosamine aur N-acetyl galactosamine kahan milte hain?
a) DNA double helix me — Wrong
b) Arthropod ke exoskeleton me — Correct
c) Mitochondria me — Wrong
d) Ribosome me — Wrong - Polysaccharides ke do major roles kaun se hain?
a) Hormone production & DNA repair — Wrong
b) Structural support & energy storage — Correct
c) Protein synthesis & enzyme activity — Wrong
d) Signal transduction & immunity — Wrong
- Nucleic acids kis type ke macromolecules hote hain?
a) Polypeptides — Wrong
b) Polynucleotides — Correct
c) Polysaccharides — Wrong
d) Polyesters — Wrong - Nucleotide kin teen components se milkar banta hai?
a) Sugar, amino acid, lipid — Wrong
b) Phosphate, lipid, base — Wrong
c) Nitrogenous base, sugar, phosphate group — Correct
d) Protein, base, phosphate — Wrong - Nitrogenous bases me se purines kaun se hote hain?
a) Cytosine and thymine — Wrong
b) Adenine and guanine — Correct
c) Thymine and uracil — Wrong
d) Cytosine and uracil — Wrong - Pyrimidines kaun se nitrogenous bases hote hain?
a) Adenine & guanine — Wrong
b) Cytosine, thymine & uracil — Correct
c) Adenine & uracil — Wrong
d) Guanine & cytosine — Wrong - Purine aur pyrimidine kya hota hai?
a) Protein molecules — Wrong
b) Basic ring structures of nitrogenous bases — Correct
c) Types of lipids — Wrong
d) Types of carbohydrates — Wrong - Ribose sugar kis category ka sugar hota hai?
a) Hexose — Wrong
b) Pentose — Correct
c) Tetrose — Wrong
d) Disaccharide — Wrong - Kaunsa nucleic acid ribose sugar contain karta hai?
a) DNA — Wrong
b) RNA — Correct
c) Both DNA & RNA — Wrong
d) None — Wrong - 2’-deoxyribose sugar kis nucleic acid me hoti hai?
a) RNA — Wrong
b) DNA — Correct
c) Both DNA & RNA — Wrong
d) Protein — Wrong - DNA ka full form kya hai?
a) Deoxyribose Nitrogen Acid — Wrong
b) Deoxyribonucleic Acid — Correct
c) Dicarboxylic Nucleic Acid — Wrong
d) Double Nitrogen Acid — Wrong - RNA ka full form kya hai?
a) Ribosomal Nucleic Acid — Wrong
b) Ribose Nitrogenous Acid — Wrong
c) Ribonucleic Acid — Correct
d) Reactive Nucleic Acid — Wrong - Nucleic acids ka primary role kya hai?
a) Energy storage — Wrong
b) Structural support — Wrong
c) Genetic information ko store aur transfer karna — Correct
d) Hormone synthesis — Wrong - Acid-insoluble fraction me kaun se essential macromolecules include hote hain?
a) Fats only — Wrong
b) Polysaccharides, polypeptides, nucleic acids — Correct
c) Only proteins — Wrong
d) Vitamins and minerals — Wrong
- Protein structure biology me kis tarah describe ki jaati hai?
a) Molecular formula se — Wrong
b) 2-dimensional chemical structure se — Wrong
c) 4 levels me — Correct
d) Sirf helical structure se — Wrong - Protein ka primary structure kya hota hai?
a) Amino acid sequence — Correct
b) 3D folding of protein — Wrong
c) Arrangement of subunits — Wrong
d) Beta pleated sheet only — Wrong - Protein ka N-terminal kya hota hai?
a) Last amino acid — Wrong
b) First amino acid — Correct
c) Middle amino acid — Wrong
d) Side chain group — Wrong - Protein ka C-terminal kya hota hai?
a) First amino acid — Wrong
b) Last amino acid — Correct
c) Peptide bond — Wrong
d) Helix start point — Wrong - Protein ki secondary structure kya represent karti hai?
a) Amino acid sequence — Wrong
b) Right-handed helices aur localized folding — Correct
c) Arrangement of multiple subunits — Wrong
d) Tertiary shape — Wrong - Tertiary structure ka main feature kya hai?
a) Simple amino acid chain — Wrong
b) Protein chain ka overall 3D folding — Correct
c) Arrangement of polypeptide subunits — Wrong
d) N-terminal amino acid — Wrong - Quaternary structure kya hota hai?
a) Single amino acid sequence — Wrong
b) Arrangement of multiple folded polypeptide subunits — Correct
c) 2D chemical diagram — Wrong
d) Alpha helix only — Wrong - Human hemoglobin ka quaternary structure kaun se subunits se banta hai?
a) Four α-type only — Wrong
b) Four β-type only — Wrong
c) Two α-type and two β-type — Correct
d) One α-type and three β-type — Wrong - Protein structure ko samajhna kyun zaroori hai?
a) Kyunki protein ka color important hai — Wrong
b) Kyunki protein function directly uski shape aur folding se linked hoti hai — Correct
c) Kyunki protein ka melting point high hai — Wrong
d) Kyunki protein sirf energy storage ke liye hota hai — Wrong - Proteins ke functions me se kaun sa example sahi hai?
a) Oxygen transport, enzyme activity, signaling — Correct
b) Starch storage — Wrong
c) DNA replication — Wrong
d) Lipid synthesis — Wrong
- Protein structure ka meaning field ke hisaab se kaise vary karta hai?
a) Sab fields me same hota hai — Wrong
b) Inorganic chemistry me molecular formula, organic me 2D diagram, physics me 3D structure, biology me 4 levels — Correct
c) Sirf amino acid sequence se define hota hai — Wrong
d) Sirf 3D folding se define hota hai — Wrong - Primary structure me protein ka kya define hota hai?
a) 3D shape — Wrong
b) Amino acid sequence — Correct
c) Arrangement of subunits — Wrong
d) Helical folding — Wrong - Protein chain ka first amino acid kya kehlata hai?
a) C-terminal — Wrong
b) N-terminal — Correct
c) Middle amino acid — Wrong
d) Alpha carbon — Wrong - Protein chain ka last amino acid kya kehlata hai?
a) N-terminal — Wrong
b) C-terminal — Correct
c) Beta carbon — Wrong
d) Side chain — Wrong - Secondary structure ka example kya hai?
a) Right-handed helix — Correct
b) Nucleotide sequence — Wrong
c) Polysaccharide chain — Wrong
d) Phosphate group — Wrong - Tertiary structure ka main purpose kya hai?
a) Amino acid linkage — Wrong
b) Protein ka 3D shape for biological activity — Correct
c) Nucleic acid formation — Wrong
d) Cell wall structure — Wrong - Quaternary structure define karta hai?
a) Single polypeptide folding — Wrong
b) Arrangement of multiple polypeptide subunits — Correct
c) Primary amino acid sequence — Wrong
d) Helix formation only — Wrong - Human hemoglobin ke subunits ka composition kya hai?
a) 4 α-type — Wrong
b) 4 β-type — Wrong
c) 2 α-type and 2 β-type — Correct
d) 1 α-type and 3 β-type — Wrong - Protein function protein structure se directly kyon linked hai?
a) Kyunki protein color se function decide hota hai — Wrong
b) Kyunki protein folding aur 3D shape determine karta hai function — Correct
c) Kyunki protein sirf energy storage ke liye hota hai — Wrong
d) Kyunki amino acids digestion ke liye important hain — Wrong - Proteins ke biological roles me se kaun sa sahi hai?
a) Oxygen transport, enzyme activity, signaling — Correct
b) Starch storage — Wrong
c) DNA replication — Wrong
d) Lipid synthesis — Wrong
- Physical change me kya hota hai?
a) Chemical bonds break hote hain — Wrong
b) Sirf shape ya state change hota hai, bonds nahi toot-te — Correct
c) New substances bante hain — Wrong
d) Reaction rate badhta hai — Wrong - Chemical reaction me kya hota hai?
a) Sirf shape change — Wrong
b) Bonds break hote hain aur new bonds bante hain, nayi substances create hoti hain — Correct
c) Water ka evaporation — Wrong
d) Melting of ice — Wrong - Ba(OH)₂ + H₂SO₄ → BaSO₄ + 2H₂O kis type ki reaction hai?
a) Physical change — Wrong
b) Inorganic chemical reaction — Correct
c) Organic reaction — Wrong
d) Enzyme-catalyzed reaction — Wrong - Hydrolysis of starch into glucose kis type ki reaction hai?
a) Inorganic reaction — Wrong
b) Organic chemical reaction — Correct
c) Physical change — Wrong
d) Oxidation-reduction reaction — Wrong - Reaction rate ka expression kya hai?
a) δP × δt — Wrong
b) δP / δt — Correct
c) δt / δP — Wrong
d) δV / δT — Wrong - Reaction rate ko kaun se factor influence karta hai?
a) Color of reactants — Wrong
b) Temperature — Correct
c) Volume of container only — Wrong
d) Pressure only — Wrong - Temperature change of 10°C ka typical effect reaction rate par kya hota hai?
a) Rate increase ya decrease nahi hota — Wrong
b) Rate double ya half ho jata hai — Correct
c) Rate 100 times change hota hai — Wrong
d) Rate 10 times change hota hai — Wrong - Catalyst ka reaction me kya role hota hai?
a) Reaction slow karta hai — Wrong
b) Reaction ko faster banata hai — Correct
c) Reactants ka amount kam karta hai — Wrong
d) Temperature badhata hai — Wrong - CO₂ + H₂O → H₂CO₃ reaction bina enzyme ke kitni fast hoti hai?
a) 600,000 molecules/sec — Wrong
b) 200 molecules/hour — Correct
c) 1 million molecules/sec — Wrong
d) 10 molecules/hour — Wrong - Carbonic anhydrase presence me CO₂ + H₂O → H₂CO₃ reaction kitni fast hoti hai?
a) 200 molecules/hour — Wrong
b) 600,000 molecules/sec — Correct
c) 10 molecules/sec — Wrong
d) 1,000 molecules/hour — Wrong - Enzymes ka kya significance hai?
a) Reaction speed me koi effect nahi — Wrong
b) Reactions ko millions times faster kar dete hain — Correct
c) Sirf physical changes karte hain — Wrong
d) Chemical bonds ko weaken karte hain permanently — Wrong
- Ek multistep reaction jisme har step ek ya zyada enzyme se catalyzed hota hai, kya kehlata hai?
a) Physical change — Wrong
b) Metabolic pathway — Correct
c) Chemical equilibrium — Wrong
d) Oxidation reaction — Wrong - Glucose metabolism me glucose ko pyruvic acid me convert karne ke kitne enzyme-catalyzed steps hote hain?
a) 5 — Wrong
b) 10 — Correct
c) 15 — Wrong
d) 20 — Wrong - Skeletal muscles me anaerobic condition me glucose metabolism ka end product kya banta hai?
a) Pyruvic acid — Wrong
b) Ethanol — Wrong
c) Lactic acid — Correct
d) Carbon dioxide — Wrong - Yeast fermentation me glucose ka main end product kya banta hai?
a) Pyruvic acid — Wrong
b) Lactic acid — Wrong
c) Ethanol — Correct
d) Glucose — Wrong - Enzyme ke active site me kya bind hota hai?
a) Product — Wrong
b) Substrate — Correct
c) Cofactor — Wrong
d) Inhibitor — Wrong - Enzyme-substrate (ES) complex ko kaise describe kiya jaata hai?
a) Permanent complex — Wrong
b) Transient (short-lived) complex — Correct
c) Product — Wrong
d) Inhibitor-bound enzyme — Wrong - Transition state kya hota hai?
a) Stable substrate — Wrong
b) Stable product — Wrong
c) Unstable intermediate between substrate and product — Correct
d) Cofactor binding site — Wrong - Activation energy kya hota hai?
a) Energy released during reaction — Wrong
b) Energy barrier between substrate and transition state — Correct
c) Energy stored in enzyme — Wrong
d) Heat released by substrate — Wrong - Enzymes activation energy par kya effect daalte hain?
a) Increase karte hain — Wrong
b) Reduce karte hain, reaction faster hoti hai — Correct
c) Reaction energy ko change karte hain — Wrong
d) Product energy badhate hain — Wrong - Exothermic reaction ka kya characteristic hai?
a) Energy absorb hoti hai — Wrong
b) Energy release hoti hai, spontaneous ho sakti hai — Correct
c) Product high energy me hota hai — Wrong
d) Enzyme required nahi hota — Wrong - Enzyme catalytic cycle ka correct sequence kya hai?
a) E → P → S — Wrong
b) E + S → ES → EP → E + P — Correct
c) S → P → E — Wrong
d) ES → S → P → E — Wrong - Enzyme-substrate binding me kya hota hai?
a) Enzyme conformation change karta hai to fit substrate — Correct
b) Substrate destroy ho jata hai — Wrong
c) Cofactor hamesha permanent bind hota hai — Wrong
d) Enzyme consumed ho jata hai — Wrong - Enzyme activity ko kaun se factors influence karte hain?
a) Temperature, pH, substrate concentration, specific chemicals — Correct
b) Only substrate type — Wrong
c) Only product type — Wrong
d) Only pressure — Wrong - High temperature enzyme activity par kya effect dalta hai?
a) Temporary inactive — Wrong
b) Denaturation, activity destroy — Correct
c) Maximum activity — Wrong
d) No effect — Wrong - Substrate concentration ka effect enzyme activity par kya hai?
a) Rate hamesha linear increase — Wrong
b) Initially rate increase, phir Vmax par saturate ho jata hai — Correct
c) Rate decrease continuously — Wrong
d) Rate constant — Wrong - Competitive inhibitor kya karta hai?
a) Substrate ko bind hone se rokte hain — Correct
b) Enzyme ko destroy karte hain — Wrong
c) Product ko inhibit karte hain — Wrong
d) Temperature change karte hain — Wrong - Malonate kis enzyme ka competitive inhibitor hai?
a) Catalase — Wrong
b) Succinic dehydrogenase — Correct
c) Peroxidase — Wrong
d) Carbonic anhydrase — Wrong - Enzymes ko generally kaise classify kiya jata hai?
a) Based on molecular weight — Wrong
b) Based on type of reaction they catalyze — Correct
c) Based on color — Wrong
d) Based on temperature sensitivity — Wrong - Oxidoreductases kya catalyze karte hain?
a) Oxidation-reduction reactions — Correct
b) Hydrolysis reactions — Wrong
c) Joining of molecules — Wrong
d) Isomerization — Wrong - Transferases ka function kya hai?
a) Transfer chemical group from one substrate to another — Correct
b) Oxidation-reduction — Wrong
c) Cleaving bonds with water — Wrong
d) Forming double bonds — Wrong - Hydrolases ka main role kya hai?
a) Hydrolysis reactions, breaking bonds using water — Correct
b) Transfer groups — Wrong
c) Isomerization — Wrong
d) Joining molecules — Wrong - Lyases kya catalyze karte hain?
a) Removal of chemical groups forming double bonds — Correct
b) Oxidation reactions — Wrong
c) Hydrolysis — Wrong
d) Isomerization — Wrong - Isomerases kya karte hain?
a) Convert substrates into isomers — Correct
b) Break bonds using water — Wrong
c) Join molecules — Wrong
d) Oxidize substrates — Wrong - Ligases ka function kya hai?
a) Joining two molecules forming new bonds — Correct
b) Hydrolysis — Wrong
c) Transfer of chemical groups — Wrong
d) Isomerization — Wrong - Apoenzyme kya hota hai?
a) Protein part of enzyme without cofactor — Correct
b) Enzyme with cofactor bound — Wrong
c) Inactive substrate — Wrong
d) Competitive inhibitor — Wrong - Prosthetic group kya hai?
a) Tightly bound organic cofactor, often part of active site — Correct
b) Temporary organic cofactor — Wrong
c) Metal ion cofactor — Wrong
d) Substrate molecule — Wrong - Coenzyme ka role kya hai?
a) Organic molecule, temporarily associated, often vitamin-derived — Correct
b) Permanent protein structure — Wrong
c) Competitive inhibitor — Wrong
d) Denatured enzyme — Wrong - Metal ion cofactor ka example kya hai?
a) Zinc in carboxypeptidase — Correct
b) NAD in dehydrogenase — Wrong
c) Haem in peroxidase — Wrong
d) ATP in kinases — Wrong - Cofactor remove karne se enzyme kya hota hai?
a) Activity loss — Correct
b) Activity increase — Wrong
c) No change — Wrong
d) Substrate convert to inhibitor — Wrong
- Qualitative tests ka main purpose kya hai?
a) Biomolecules ke exact amount measure karna — Wrong
b) Specific color reactions se biomolecules identify karna — Correct
c) Temperature of sample determine karna — Wrong
d) pH change measure karna — Wrong - Qualitative tests kahan useful hain?
a) Biology labs, medicine, food science, research — Correct
b) Only cooking — Wrong
c) Only industrial manufacturing — Wrong
d) Only physics labs — Wrong - Living organisms aur non-living matter ka elemental composition kaise hota hai?
a) Totally different — Wrong
b) Qualitatively similar, lekin C, H, O living organisms me zyada — Correct
c) Only water present in non-living matter — Wrong
d) Only proteins present in non-living matter — Wrong - Living systems me sabse abundant chemical kya hai?
a) Carbon — Wrong
b) Water — Correct
c) Lipids — Wrong
d) Proteins — Wrong - Small biomolecules ka molecular weight kitna hota hai?
a) > 2000 Da — Wrong
b) < 1000 Da — Correct
c) 1500–2000 Da — Wrong
d) > 5000 Da — Wrong - Small biomolecules me kaun kaun se compounds hote hain?
a) Amino acids, monosaccharides, disaccharides, fatty acids, glycerol, nucleotides, nucleosides, nitrogen bases — Correct
b) Only proteins — Wrong
c) Only lipids — Wrong
d) Only polysaccharides — Wrong - True macromolecules living systems me kaun se hote hain?
a) Proteins, nucleic acids, polysaccharides — Correct
b) Only lipids — Wrong
c) Only water — Wrong
d) Only vitamins — Wrong - Lipids macromolecular fraction me kyun aate hain?
a) Kyunki lipids high molecular weight ke hote hain — Wrong
b) Kyunki membrane-associated hote hain — Correct
c) Kyunki water-soluble hote hain — Wrong
d) Kyunki carbohydrates hote hain — Wrong - Proteins ka structure kaise define hota hai?
a) Only primary structure — Wrong
b) Primary, secondary, tertiary, quaternary — Correct
c) Only quaternary structure — Wrong
d) Only secondary structure — Wrong - Nucleic acids ka main function kya hai?
a) Energy storage — Wrong
b) Genetic material, hereditary information carry karna — Correct
c) Structural proteins banane — Wrong
d) Lipid synthesis — Wrong - Polysaccharides ka role kya hai?
a) Cell wall formation in plants/fungi, exoskeleton in arthropods, energy storage (starch/glycogen) — Correct
b) Only genetic material — Wrong
c) Only enzyme catalysis — Wrong
d) Only hormone production — Wrong - Animal me most abundant protein kaun sa hai?
a) RuBisCO — Wrong
b) Collagen — Correct
c) Hemoglobin — Wrong
d) Actin — Wrong - Biosphere me most abundant protein kaun sa hai?
a) Collagen — Wrong
b) RuBisCO — Correct
c) Hemoglobin — Wrong
d) Myosin — Wrong - Enzymes kya karte hain?
a) Energy store karte hain — Wrong
b) Biochemical reactions catalyze karte hain — Correct
c) Genetic information carry karte hain — Wrong
d) Cell membrane banate hain — Wrong - Ribozymes kya hote hain?
a) Proteins — Wrong
b) Nucleic acids with catalytic activity — Correct
c) Lipids — Wrong
d) Polysaccharides — Wrong - Enzymes ki specificity kis cheez me hoti hai?
a) Substrate — Correct
b) Temperature — Wrong
c) pH — Wrong
d) Cofactor — Wrong - Enzymes optimal activity kab dikhate hain?
a) Extreme temperature — Wrong
b) Specific optimum temperature and pH — Correct
c) Zero temperature — Wrong
d) Any pH — Wrong - High temperature me enzymes kya hote hain?
a) Denature ho jate hain — Correct
b) Highly active — Wrong
c) Substrate ban jata hai — Wrong
d) Product banta nahi — Wrong - Enzymes reactions me kya effect dalte hain?
a) Lower activation energy, increase reaction rate — Correct
b) Increase activation energy — Wrong
c) Convert substrate into inhibitor — Wrong
d) Stop reaction — Wrong
