Take 5 chapter-wise practice tests plus 1 full module test on Biomolecules for NEET with +4/-1 scoring, answer review, and concise explanations.
Attempt 5 focused practice tests and 1 mixed module test for Biomolecules with concept-first NEET MCQs on polymers, enzymes, nucleic acids, and metabolism.
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1. Compounds having carbon-hydrogen bonds are broadly called:
Explanation: Carbon-hydrogen framework is typical of organic molecules.
2. Water forms the highest proportion of living cells because it:
Explanation: Most biochemical reactions occur in aqueous medium.
3. A molecule with low molecular mass such as amino acid is categorized as:
Explanation: Micromolecules are small compounds obtained after tissue analysis.
4. Proteins, polysaccharides, and nucleic acids are grouped as:
Explanation: They are large biomolecules with high molecular mass.
5. The four major elements making up most of living matter are:
Explanation: These four elements dominate the composition of biomolecules.
6. Glucose is an example of:
Explanation: Glucose is a simple sugar unit.
7. Two monosaccharides joined by glycosidic bond form a:
Explanation: Disaccharides arise by condensation of two sugar units.
8. Storage carbohydrate of animals is:
Explanation: Animals store excess glucose as glycogen.
9. Cellulose is mainly important as:
Explanation: Cellulose gives rigidity to plant cell walls.
10. Starch is composed of:
Explanation: These are the two major fractions of starch.
11. A simple lipid on hydrolysis typically yields:
Explanation: Triglycerides are built from glycerol and fatty acids.
12. Saturated fatty acids differ from unsaturated fatty acids because they:
Explanation: Unsaturated fatty acids contain one or more double bonds.
13. Phospholipids are major components of:
Explanation: Their amphipathic nature suits membrane formation.
14. Proteins are polymers of:
Explanation: Peptide bonds link amino acids into polypeptides.
15. The bond joining two amino acids is:
Explanation: Peptide linkage forms by removal of water between amino and carboxyl groups.
16. Amino acids are called amphoteric because they:
Explanation: They contain both amino and carboxyl functional groups.
17. Vitamins are generally required in the body in:
Explanation: They are micronutrients needed in small quantities.
18. Magnesium is especially associated with:
Explanation: Magnesium is central in chlorophyll.
19. Which pair is correctly matched?
Explanation: Cellulose is structural, while glycogen is the animal storage polysaccharide.
20. The strongest overview of cell chemistry is:
Explanation: This captures the broad biochemical organization of cells.
21. A student calls cellulose an energy-storage carbohydrate in plants. The correction is:
Explanation: Top-level questions often test function, not just names: starch stores, cellulose supports, glycogen stores in animals.
22. Revision Booster 1. Recheck this Biomolecules concept with a fresh option order. Compounds having carbon-hydrogen bonds are broadly called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Carbon-hydrogen framework is typical of organic molecules.
23. Revision Booster 2. Recheck this Biomolecules concept with a fresh option order. Water forms the highest proportion of living cells because it:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Most biochemical reactions occur in aqueous medium.
24. Revision Booster 3. Recheck this Biomolecules concept with a fresh option order. A molecule with low molecular mass such as amino acid is categorized as:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Micromolecules are small compounds obtained after tissue analysis.
25. Revision Booster 4. Recheck this Biomolecules concept with a fresh option order. Proteins, polysaccharides, and nucleic acids are grouped as:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. They are large biomolecules with high molecular mass.
26. The sequence of amino acids in a polypeptide defines its:
Explanation: Primary structure is the linear order of amino acids.
27. An alpha helix is an example of:
Explanation: Secondary structure refers to local folding patterns such as alpha helix.
28. The overall three-dimensional shape of a single polypeptide is its:
Explanation: Tertiary structure results from further folding of secondary structure.
29. Association of multiple polypeptide chains gives rise to:
Explanation: This level involves interaction among separate subunits.
30. Fibrous proteins are generally:
Explanation: Fibrous proteins such as keratin provide support.
31. Globular proteins are often:
Explanation: Many enzymes and transport proteins are globular.
32. Denaturation of a protein means:
Explanation: Denaturation disrupts higher-order structure and biological activity.
33. A denatured protein usually retains its:
Explanation: Peptide bonds usually remain intact despite loss of folding.
34. Most enzymes are:
Explanation: The majority of enzymes are protein catalysts.
35. An enzyme accelerates reaction by lowering:
Explanation: Catalysts make the reaction pathway energetically easier.
36. The region of enzyme where substrate binds is called:
Explanation: The active site forms a specific fit with the substrate.
37. Substrate specificity arises mainly because of:
Explanation: The shape and chemistry of the active site determine specificity.
38. Many enzymes require non-protein helpers called:
Explanation: Cofactors may be metal ions or organic coenzymes.
39. The protein part of a conjugated enzyme is the:
Explanation: Apoenzyme combines with its cofactor to form active holoenzyme.
40. The complete active enzyme along with cofactor is called:
Explanation: Holoenzyme is the catalytically active complete unit.
41. Rising temperature increases enzyme activity only up to an optimum because:
Explanation: Beyond optimum, enzyme structure is disrupted.
42. Every enzyme has an optimum pH because:
Explanation: Different enzymes function best in different pH ranges.
43. Competitive inhibition can often be reduced by:
Explanation: Substrate can outcompete an inhibitor for the active site.
44. Which statement is correct?
Explanation: They speed up reactions without permanent consumption.
45. The strongest summary is:
Explanation: Catalytic function depends on correct protein structure and binding geometry.
46. If an inhibitor resembles the substrate and competes for the active site, the inhibition is:
Explanation: A substrate-like molecule occupying the active site is the classic competitive inhibition model.
47. Revision Booster 1. Recheck this Biomolecules concept with a fresh option order. The sequence of amino acids in a polypeptide defines its:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Primary structure is the linear order of amino acids.
48. Revision Booster 2. Recheck this Biomolecules concept with a fresh option order. An alpha helix is an example of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Secondary structure refers to local folding patterns such as alpha helix.
49. Revision Booster 3. Recheck this Biomolecules concept with a fresh option order. The overall three-dimensional shape of a single polypeptide is its:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Tertiary structure results from further folding of secondary structure.
50. Revision Booster 4. Recheck this Biomolecules concept with a fresh option order. Association of multiple polypeptide chains gives rise to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. This level involves interaction among separate subunits.
51. The monomeric unit of nucleic acid is:
Explanation: Nucleic acids are polymers of nucleotide units.
52. A nucleotide is made of sugar, phosphate, and:
Explanation: The three parts together form a nucleotide.
53. The sugar present in RNA is:
Explanation: RNA contains ribose, while DNA contains deoxyribose.
54. The sugar present in DNA is:
Explanation: DNA differs from RNA by the absence of one oxygen at the 2' carbon.
55. Thymine is found in:
Explanation: RNA contains uracil instead of thymine.
56. Uracil is characteristic of:
Explanation: Uracil replaces thymine in RNA.
57. The bond linking nucleotide units in one strand is:
Explanation: This bond joins the sugar-phosphate backbone of the chain.
58. Adenine pairs with thymine through:
Explanation: A-T pairing is stabilized by two hydrogen bonds.
59. Guanine pairs with cytosine through:
Explanation: G-C pairing is stronger because it has three hydrogen bonds.
60. Chargaff's rule states that in double-stranded DNA:
Explanation: Complementary pairing creates this equality.
61. DNA is described as:
Explanation: Watson and Crick proposed the double helix model.
62. The RNA that carries amino acids to ribosome is:
Explanation: Transfer RNA brings specific amino acids during translation.
63. The RNA that serves as template for protein synthesis is:
Explanation: Messenger RNA carries codon information from DNA.
64. Ribosomal RNA is important as a component of:
Explanation: rRNA combines with proteins to make ribosomes.
65. A nucleoside differs from a nucleotide because it lacks:
Explanation: Base + sugar forms nucleoside; adding phosphate gives nucleotide.
66. DNA stores genetic information mainly in the:
Explanation: The order of bases encodes biological information.
67. Purines among nitrogenous bases are:
Explanation: Purines have double-ring structures.
68. Pyrimidines include:
Explanation: These bases have single-ring structures.
69. Which pair is correctly matched?
Explanation: RNA contains uracil, while DNA contains thymine.
70. The best summary of nucleic acid chemistry is:
Explanation: Nucleic acids are informational polymers built from nucleotide monomers.
71. In a DNA strand, the sugar-phosphate backbone is held mainly by:
Explanation: Hydrogen bonds connect complementary bases, but phosphodiester bonds build each strand's backbone.
72. Revision Booster 1. Recheck this Biomolecules concept with a fresh option order. The monomeric unit of nucleic acid is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Nucleic acids are polymers of nucleotide units.
73. Revision Booster 2. Recheck this Biomolecules concept with a fresh option order. A nucleotide is made of sugar, phosphate, and:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. The three parts together form a nucleotide.
74. Revision Booster 3. Recheck this Biomolecules concept with a fresh option order. The sugar present in RNA is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. RNA contains ribose, while DNA contains deoxyribose.
75. Revision Booster 4. Recheck this Biomolecules concept with a fresh option order. The sugar present in DNA is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. DNA differs from RNA by the absence of one oxygen at the 2' carbon.
76. Metabolism includes all:
Explanation: Metabolism covers all biosynthetic and degradative reactions.
77. Anabolic reactions are those that:
Explanation: Anabolism is constructive metabolism.
78. Catabolic reactions generally:
Explanation: Catabolism is degradative metabolism.
79. The immediate energy currency of the cell is:
Explanation: ATP stores usable energy in phosphoanhydride bonds.
80. ATP is best described as:
Explanation: Hydrolysis of ATP releases usable energy for cellular work.
81. When ATP loses its terminal phosphate, it becomes:
Explanation: ATP hydrolysis yields ADP and inorganic phosphate in most cases.
82. NADH and FADH2 are important because they:
Explanation: They act as reducing equivalents in oxidation-reduction reactions.
83. Oxidation in biochemistry often means:
Explanation: Biochemical oxidation and reduction often involve hydrogen transfer.
84. Reduction in biochemical terms often involves:
Explanation: Reduction is the counterpart of oxidation in redox reactions.
85. The continual synthesis and breakdown of biomolecules in cells is called:
Explanation: Cellular molecules are constantly renewed and recycled.
86. Metabolic pathways proceed in small steps mainly to:
Explanation: Stepwise reactions permit control and minimize energy loss as heat.
87. A metabolic pathway is typically a:
Explanation: Each step usually has its own enzyme.
88. Formation of proteins from amino acids is an example of:
Explanation: The cell assembles a complex polymer from monomeric units.
89. Breakdown of glycogen to release glucose units is an example of:
Explanation: Stored polymer is degraded into simpler units.
90. ATP couples exergonic and endergonic reactions because:
Explanation: ATP acts as an energy intermediate in many pathways.
91. Which pair is correctly matched?
Explanation: Anabolism builds molecules; catabolism breaks them down.
92. A living cell remains alive because biomolecules are in a state of:
Explanation: Continuous metabolic flow distinguishes the living state.
93. Metabolism ceases completely when a cell:
Explanation: The living state depends on ongoing coordinated metabolism.
94. Which statement is correct?
Explanation: Continuous reaction networks maintain living systems away from equilibrium.
95. The best summary is:
Explanation: This captures how cellular chemistry remains functional and ordered.
96. The most faculty-level way to read ATP in metabolism is that ATP:
Explanation: ATP is not just an energy molecule; it is the cell's coupling currency for controlled work.
97. Revision Booster 1. Recheck this Biomolecules concept with a fresh option order. Metabolism includes all:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Metabolism covers all biosynthetic and degradative reactions.
98. Revision Booster 2. Recheck this Biomolecules concept with a fresh option order. Anabolic reactions are those that:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Anabolism is constructive metabolism.
99. Revision Booster 3. Recheck this Biomolecules concept with a fresh option order. Catabolic reactions generally:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Catabolism is degradative metabolism.
100. Revision Booster 4. Recheck this Biomolecules concept with a fresh option order. The immediate energy currency of the cell is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. ATP stores usable energy in phosphoanhydride bonds.
101. When living tissue is ground in trichloroacetic acid, small molecules remain in:
Explanation: Small molecules remain dissolved, while macromolecules precipitate.
102. The acid-insoluble fraction mainly contains:
Explanation: Large polymers precipitate in the acid-insoluble fraction.
103. Polysaccharides are built from repeating:
Explanation: Glucose and other simple sugars are their monomer units.
104. Nucleic acids are polymers of:
Explanation: Phosphodiester bonds join nucleotide monomers.
105. Proteins are often called heteropolymers because they:
Explanation: Protein sequence uses a variety of amino acid monomers.
106. Why are lipids often placed in acid-insoluble fraction even though they are not true polymers?
Explanation: Lipids behave differently in extraction due to hydrophobicity and membrane association.
107. Starch, glycogen, and cellulose are all:
Explanation: They differ in structure and function but are all sugar polymers.
108. The monomer common to both DNA and RNA is a:
Explanation: Both nucleic acids are polymers of nucleotides.
109. Which statement about polymers is correct?
Explanation: This is the standard polymer distinction.
110. A peptide of many amino acids is called a:
Explanation: Long chains of amino acids form polypeptides.
111. Membrane lipids often become functionally important because they are:
Explanation: Their dual nature allows bilayer formation.
112. The term 'biomolecule' includes:
Explanation: Biomolecules cover a broad set of cell chemicals relevant to life.
113. The acid-soluble pool usually contains:
Explanation: These are low molecular mass compounds.
114. The acid-insoluble fraction can be viewed as the chemical equivalent of:
Explanation: Large biomolecules correspond to structural and organized cellular material.
115. Why is water not usually listed as a biomolecule in the same way as proteins or lipids?
Explanation: Water is essential, but it is not classified with the major organic biomolecule groups.
116. Which pair is correctly matched?
Explanation: Proteins are built by peptide linkages between amino acids.
117. Which statement is correct?
Explanation: This framework ties together the chapter's molecular comparisons.
118. Amino acids, nucleotides, and monosaccharides are best grouped as:
Explanation: They function as monomers for proteins, nucleic acids, and polysaccharides.
119. The NCERT-style view of the living state emphasizes that:
Explanation: Life emerges from coordinated organization, not isolated molecules.
120. The strongest summary of Biomolecules is:
Explanation: That summary captures the chapter's full biochemical scope.
121. Why do proteins usually appear in the acid-insoluble fraction during biochemical analysis?
Explanation: The acid-insoluble fraction enriches macromolecules and cellular assemblies rather than small soluble metabolites.
122. Revision Booster 1. Recheck this Biomolecules concept with a fresh option order. When living tissue is ground in trichloroacetic acid, small molecules remain in:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Small molecules remain dissolved, while macromolecules precipitate.
123. Revision Booster 2. Recheck this Biomolecules concept with a fresh option order. The acid-insoluble fraction mainly contains:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Large polymers precipitate in the acid-insoluble fraction.
124. Revision Booster 3. Recheck this Biomolecules concept with a fresh option order. Polysaccharides are built from repeating:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Glucose and other simple sugars are their monomer units.
125. Revision Booster 4. Recheck this Biomolecules concept with a fresh option order. Nucleic acids are polymers of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Phosphodiester bonds join nucleotide monomers.