These Biomolecules Class 11 MCQ and Answers are composed by our livemcqs team specially for NEET, AIIMS, and other Medical Entrance aspirants. These Biomolecules MCQ covers all concepts of Chapter 9 of Class 11 Biology. You can download these Questions by clicking the Link “Biomolecules NEET Questions PDF” given below.
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| Topic: | Biomolecules Class 11 MCQ |
| Examinations: | NEET, AIIMS, JIPMER |
| Class: | 11 (CBSE/NCERT) Biology |
| No of Questions: | 100+ |
| Question type: | Multiple Choice Question |
| Question Format: | Text & PDF |
| PDF Size: | 1 MB |
| Download PDF: | Attached Below |
Biomolecules Class 11 MCQ and Answers
1. What does the acid-soluble pool represent?
a) Protoplasmic content
b) DNA content
c) Genetic material
d) Cytoplasmic content
Answer: d
2. Which of the following is a common feature to all the compounds found in the acid-soluble pool?
a) They all are biomacromolecules
b) They have molecular weights greater than 8000 Dalton
c) They have molecular weights in the range of 18-8000 Dalton
d) They have molecular weights in the range of 18-800 Dalton
Answer: d
3. Which of the following is an exception to the acid-insoluble fraction?
a) Proteins
b) Lipids
c) Nucleic acids
d) Polysaccharides
Answer: b
4. Living organisms are made up of how many types of biomolecules?
a) One
b) Two
c) Three
d) Five
Answer: b
5. Which of the following is not a polymeric substance?
a) Lipids
b) Nucleic acids
c) Polysaccharides
d) Proteins
Answer: a
6. Which of the following is true about lipids?
a) They have very large molecular weights
b) They are not present in the human body
c) They are present in the cell membrane
d) They are present in the acid-soluble pool
Answer: c
7. Which of the following is the most abundant chemical in the living organisms?
a) Proteins
b) Carbohydrates
c) Water
d) Nucleic acids
Answer: c
8. Which of the following protein is an enzyme?
a) Trypsin
b) Insulin
c) Collagen
d) Antibody
Answer: a
9. Which of the following bond is present in proteins?
a) Glycosidic bond
b) Ester bonds
c) Peptide bonds
d) Phosphoester bonds
Answer: c
10. Which of the following proteins is the source of essential amino acids?
a) Non-dietary proteins
b) Dietary proteins
c) Amino acids
d) Linker proteins
Answer: b
11. What is the monomeric unit of cellulose?
a) Glycine
b) Glucose
c) Lactose
d) Fructose
Answer: b
12. Which of the following is the most abundant protein in the animal world.?
a) Collagen
b) RuBisCO
c) Cellulose
d) Lactose
Answer: a
13. In which of the following organisms, starch is present as a storehouse of energy?
a) Animal
b) Plants
c) Bacteria
d) Mycoplasma
Answer: b
14. What is the full form of RuBisCO?
a) Ribosome bisphosphate Carboxylase-Oxidase
b) Ribulose bisphosphate Carboxylase-Oxidase
c) Ribosome bisphosphate Carboxy-Oxygenase
d) Ribulose bisphosphate Carboxylase-Oxygenase
Answer: d
15. Which protein is the most abundant?
a) ATP synthase
b) Collagen
c) RuBisCO
d) NADPH oxidase
Answer: c
16. Which protein is most abundant in the animal world?
a) Actin
b) Keratin
c) Collagen
d) Histone
Answer: c
17. Which of these is not a function of protein?
a) Major constituent of the cell membrane
b) Transport of nutrients
c) Defense against pathogens
d) Regulation of homeostasis
Answer: a
18. How are essential amino acids obtained?
a) Produced in the body
b) Through diet
c) Its levels remain constant
d) From plants
Answer: b
19. A protein is a _____
a) monomer
b) homopolymer
c) heteropolymer
d) dimer
Answer: c
20. Amino acids are linked together by _____
a) peptide bonds
b) hydrogen bonds
c) glycosidic linkages
d) hydrophobic interactions
Answer: a
21. A continuous strand of the same amino acids linked to each other forms a _____
a) dimer
b) monomer
c) heteropolymer
d) homopolymer
Answer: d
22 Collagen is a(n) ______
a) hormone
b) intracellular ground substance
c) intercellular ground substance
d) enzyme
Answer: c
23. Which of these is an enzyme?
a) GLUT-4
b) Collagen
c) Insulin
d) Trypsin
Answer: d
24. Which of these is a hormone?
a) Collagen
b) Keratin
c) Insulin
d) GLUT-4
Answer: c
25. What is the function of antibody?
a) Acts as tissue toxins
b) Degrades old erythrocytes
c) Fights infectious agents
d) Helps in growth of cells
Answer: c
26. Which of these proteins help in recognition of sensory signals?
a) Receptor proteins
b) Structural proteins
c) Hormones
d) Nucleoproteins
Answer: a
27. What is the function of GLUT-4?
a) Enables transport of both insulin and glucose into cells
b) Enables glucose transport into cells
c) Enables glucose transport out of cells
d) Enables transport of both sodium and glucose out of cells
Answer: b
28. Which of these is a macromolecule?
a) Vitamins
b) Minerals
c) Lipids
d) Polysaccharides
Answer: d
29. Which of these is present in the acid insoluble pool of homogenized, strained tissue?
a) Ions
b) Minerals
c) Polysaccharides
d) Vitamins
Answer: c
30. Polysaccharide chains are made of ______
a) disaccharides
b) glucose
c) sugars
d) fructose
Answer: c
313. Which of these is not a monosaccharide?
a) Sucrose
b) Glucose
c) Fructose
d) Galactose
Answer: a
32. Cellulose is a _____
a) heteropolymer
b) homopolymer
c) dimer
d) monomer
Answer: b
33. Cellulose is a polymer of _____
a) galactose and fructose
b) glucose and fructose
c) glucose
d) glucose and galactose
Answer: c
34. Which of these is a storehouse of energy in plant tissues?
a) Starch
b) Cellulose
c) Glucose
d) Fructose
Answer: a
35. Which of these is a storehouse of energy in animal tissues?
a) Glucose
b) Cellulose
c) Starch
d) Glycogen
Answer: d
36. Inulin is a polymer of ______
a) glucose and fructose
b) glucose
c) fructose
d) glucose, fructose and galactose
Answer: c
37. Which part of glycogen is the reducing end?
a) Second monomer from the left
b) Second monomer from the right
c) Left end
d) Right end
Answer: d
38. Which part of cellulose is the non-reducing end?
a) Second monomer from the left
b) Second monomer from the right
c) Left end
d) Right end
Answer: c
39. The building blocks ok polysaccharides are _____
a) glucose units
b) disaccharides
c) monosaccharides
d) carbon molecules
Answer: c
40. Which of these is not true about cellulose?
a) It is the second most abundant organic polymer
b) It has linear chains
c) It is made of glucose subunits
d) It is a homopolymer
Answer: a
41. Which of these statements is not true regarding polysaccharides?
a) Cellulose has a linear structure
b) Inulin is a heteropolymer
c) Glycogen has a branched structure
d) Polysaccharide chains have a non-reducing left end
Answer: b
42. Which of these is a branched polysaccharide?
a) Sucrose
b) Cellulose
c) Glycogen
d) Chitin
Answer: c
43. What is the shape of the secondary structure of starch?
a) Spherical
b) Linear
c) Helical
d) Branched
Answer: c
44. Which molecule can starch hold in its helix?
a) Iodine
b) DNA
c) Amylopectin
d) Cellulose
Answer: a
45. In which part of the starch chain is iodine incorporated?
a) Left non-reducing end
b) Right reducing end
c) Helix
d) Branched portion
Answer: c
46. What color is the starch-iodine complex?
a) Yellow
b) Brick red
c) Blue
d) Black
Answer: c
47. Which of these molecules can hold iodine molecules?
a) Starch
b) Cellulose
c) Chitin
d) Sucrose
Answer: a
48. The absence of which structure in cellulose does not allow it to hold iodine molecules?
a) Branches
b) Left non-reducing end
c) Right reducing end
d) Helix
Answer: d
49. What is the main component of the plant cell wall?
a) Lipids
b) Glycogen
c) Cellulose
d) Peptidoglycan
Answer: c
50. Which of these structures do not contain cellulose as its major constituent?
a) Cotton fibers
b) Plant cell wall
c) Jute
d) Fungal cell wall
Answer: d
51. Chitin is a _____
a) monomer
b) heteropolymer
c) homopolymer
d) dimer
Answer: c
52. Which of these is a complex polysaccharide?
a) Glycogen
b) Inulin
c) Chitin
d) Starch
Answer: c
53. What is the main constituent of the exoskeleton of arthropods?
a) Chitin
b) Cellulose
c) Glycogen
d) Starch
Answer: a
54. Which of these statements is not true regarding polysaccharides?
a) Inulin is a polysaccharide made of fructose
b) Chitin is a heteropolymer
c) Glycogen is a highly branched polysaccharide
d) Cellulose makes up cotton fibers
Answer: b
55. Which of these is present in the acid insoluble fraction of living tissue?
a) ascorbic acid
b) Magnesium
c) Riboflavin
d) DNA
Answer: d
56. Nucleic acids are _____
a) polypeptides
b) polyimides
c) polynucleotides
d) polysaccharides
Answer: c
57. Which of these is not a part of the macromolecular fraction of a cell?
a) Polynucleotides
b) Polysaccharides
c) Riboflavin
d) Polypeptides
Answer: c
58. What is the building block of nucleic acids?
a) Nucleotide
b) Nucleoside
c) Nucleosome
d) Nucleoprotein
Answer: a
59. How many distinct components does each nucleotide contain?
a) 2
b) 3
c) 1
d) 4
Answer: b
60. How many distinct components does each nucleoside contain?
a) 3
b) 1
c) 2
d) 4
Answer: c
61. Which of these components of nucleotides is heterocyclic?
a) Adenine
b) Phosphoric acid
c) Monosaccharide
d) Phosphate
Answer: a
62. Which monosaccharide is present in nucleic acid?
a) Fructose
b) Galactose
c) Glucose
d) Ribose
Answer: d
63. The phosphate groups present in nucleotides are related to ______
a) pyrophosphoric acid
b) phosphorous acid
c) phosphoric acid
d) metaphosphoric acid
Answer: c
64. Which of these is a substituted purine?
a) Cytosine
b) Thymine
c) Uracil
d) Guanine
Answer: d
65. What type of sugar does DNA contain?
a) Ribose
b) 3’ deoxyribose
c) 2’ deoxyribose
d) 5’ deoxyribose
Answer: c
66. Proteins are heteropolymers of ______
a) lipids
b) monosaccharides
c) peptides
d) amino acids
Answer: d
67. Structure of molecules in inorganic chemistry refers to the ______
a) three-dimensional structure
b) two-dimensional structure
c) molecular formula
d) primary structure
Answer: c
68. Structure of molecules in physics refers to the ______
a) primary structure
b) two-dimensional structure
c) three-dimensional structure
d) molecular formula
Answer: c
69. How many levels of organization do proteins have?
a) 4
b) 3
c) 2
d) 5
Answer: a
70. What is the configuration of proteins in the primary structure?
a) Helix
b) Line
c) Sheet
d) Globule
Answer: b
71. What makes up the primary structure of proteins?
a) Peptides
b) Peptones
c) Amino acids
d) Polypeptides
Answer: c
72. What is the left end of the primary structure of proteins represented by?
a) First amino acid
b) Last amino acid
c) Cofactor
d) Methyl group
Answer: a
73. What is the right end of the primary structure of proteins represented by?
a) Methyl group
b) Cofactor
c) First amino acid
d) Last amino acid
Answer: d
74. What is the first amino acid of the primary structure known as?
a) A-terminal amino acid
b) C-terminal amino acid
c) N-terminal amino acid
d) L-terminal amino acid
Answer: c
75. What is the last amino acid of the primary structure known as?
a) N-terminal amino acid
b) L-terminal amino acid
c) S-terminal amino acid
d) C-terminal amino acid
Answer: d
76. Which of these bonds is present in the primary structure of protein?
a) Peptide bond
b) Glycosidic bond
c) Hydrogen bond
d) Disulfide bonds
Answer: a
77. Which of these is a type of secondary structure of proteins?
a) Line
b) Sheet
c) Globule
d) Spherical
Answer: b
78. What type of helix is observed in proteins?
a) Left-handed helix
b) Parallel double helix
c) Antiparallel double helix
d) Right-handed helix
Answer: d
79. Which of these statements is true about the secondary structure of proteins?
a) Secondary structure of protein occurs only in the form of helices
b) Protein helices are always double-stranded
c) Protein helices and right-handed
d) Entire primary structure of the protein is folded into a helix
Answer: c
80. Which of these structures is necessary for the activity of proteins?
a) Alpha–helix
b) Primary structure
c) Tertiary structure
d) Beta–sheet
Answer: c
81. Which of these structures is three-dimensional?
a) Tertiary structure
b) Primary structure
c) Alpha–helix
d) Beta–sheet
Answer: a
82. Which of these structures have more than one polypeptide chain?
a) Primary
b) Tertiary
c) Quaternary
d) Secondary
Answer: c
83. Which of these levels of organization does hemoglobin possess?
a) Quaternary
b) Tertiary
c) Secondary
d) Primary
Answer: a
84. How many subunits does human hemoglobin contain?
a) 2
b) 3
c) 6
d) 4
Answer: d
85. How many types of subunits does hemoglobin possess?
a) 1
b) 4
c) 2
d) 3
Answer: c
86. Which level of organization do beta sheets belong to?
a) Primary
b) Quaternary
c) Secondary
d) Tertiary
Answer: c
87. In which of these structures of proteins can disulfide bonds be found?
a) Tertiary structure
b) Alpha helix
c) Beta sheet
d) Primary structure
Answer: a
88. How many beta subunits are present in human hemoglobin?
a) 1
b) 2
c) 3
d) 4
Answer: b
89. Which of these units is not used to express the concentration of biomolecules?
a) Mols/cell
b) Mols/liter
c) Mols/microliter
d) Mols/kelvin
Answer: d
90. Which of these statements is true about biomolecules?
a) Biomolecules cannot be broken down into simpler substances
b) Concentration of biomolecules can be expressed in mols/kelvin
c) Biomolecules have a turnover
d) Each cell has only two types of biomolecules
Answer: c
91. Which of these is not true about metabolism?
a) It involves the breaking down of biomolecules
b) It involves the formation of biomolecules
c) It is due to this process that biomolecules do not have a turnover
d) It involves various chemical reactions
Answer: c
92. At which level does a metabolic reaction take place?
a) Biomolecular level
b) Cellular level
c) Tissue level
d) Organ level
Answer: a
93. How do we convert an amino acid into an amine?
a) Addition of carbon dioxide
b) Removal or carbon dioxide
c) Addition of ammonia
d) Removal of ammonia
Answer: b
94. What is obtained when a molecule of carbon dioxide is removed from an amino acid?
a) Ketone
b) Aldehyde
c) Amine
d) Ester
Answer: c
95. How can a disaccharide be converted into monosaccharides?
a) Hydrolysis
b) Phosphorylation
c) Dehydrogenation
d) Dehydration
Answer: a
96. Which bond is hydrolyzed to convert a disaccharide into monosaccharides?
a) Disulfide bond
b) Hydrogen bond
c) Phosphodiester bond
d) Glycosidic bond
Answer: d
97. Which of these statements is false regarding metabolism?
a) Most reactions occur in metabolic pathways
b) One metabolic reaction is linked to another in most cases
c) Metabolic pathways are linear in nature
d) Various metabolic pathways may crisscross each other
Answer: c
98. Which of these do not characterize the flow of metabolites in the body?
a) It has a definite rate
b) It has a definite direction
c) Flow may be linear or circular
d) It follows arbitrary pathways
Answer: d
99. The dynamic state of constituents of the body is the _____
a) serum flow
b) blood flow
c) metabolite flow
d) plasma flow
Answer: c
100. The metabolic breakdown of biomolecules is known as _____
a) digestion
b) anabolism
c) catabolism
d) degradation
Answer: c
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