Biomolecules Multiple Choice Question And Answers

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Biomolecules Multiple Choice Questions

Question 1. Which of the following are not polymeric?

  1. Proteins
  2. Polysaccharides
  3. Lipids
  4. Nucleic acids

Answer: 3. Lipids

Question 2. Which one of the following statements is correct, with reference to enzymes?

  1. Holoenzyme = Apoenzyme + Coenzyme
  2. Coenzyme = Apoenzyme + Holoenzyme
  3. Hojoenzyme = Coenzyme + Co-factor
  4. Apoenzyme = Holoenzyme + Co-enzyme

Answer: 1. Holoenzyme = Apoenzyme + Coenzyme

Question 3. DNA fragments are-

  1. Negatively charged
  2. Neutral
  3. Either positively or negatively charged depending on their size
  4. Positively charged

Answer: 1. Negatively charged

Read and Learn More WBCHSE Multiple Choice Question and Answers for Class 11 Biology

Question 4. Which one of the following statements is wrong?

  1. Cellulose is a polysaccharide
  2. Uracil is a pyrimidine
  3. Glycine is a sulphur containing amino acid
  4. Sucrose is a disaccharide

Answer: Glycine is a sulphur containing amino acid

Question 5. Bill The two polypeptides of human insulin are linked together by—

  1. Phosphodiester bonds
  2. Covalent bonds
  3. Disulphide bridges
  4. Hydrogen bonds

Answer: 3. Disulphide bridges

Question 6. A non-proteinaceous enzyme is—

  1. Lysozyme
  2. Ribozyme
  3. Ligase
  4. Deoxyribonuclease

Answer: 2. Ribozyme

Question 7. Which of the following biomolecules does have a phosphodiester bond?

  1. Nucleic acids in a nucleotide
  2. Fatty acids in a diglyceride
  3. Monosaccharides in a polysaccharide
  4. Amino acids in a polypeptide

Answer: 1. Nucleic acids in a nucleotide

Question 8. Which one of the following is not applicable to RNA?

  1. Chargaffs rule
  2. Complementary base pairing
  3. 5′ phosphoryl and 3′ hydroxyl ends
  4. Heterocyclic nitrogenous bases

Answer: 1. Chargaffs rule

Question 9. The chitinous exoskeleton of arthropods is formed by the polymerisation of—

  1. Lipoglycans
  2. Keratin sulphate and chondroitin sulphate
  3. D-glucosamine
  4. N-acetyl glucosamine

Answer: 4. N-acetyl glucosamine

Question 10. Select the option which is not correct with respect to enzyme action.

  1. Substrate binds with enzyme at its active site
  2. Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate
  3. A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate
  4. Malonate is a competitive inhibitor of succinic dehydrogenase

Answer: 2. Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate

Question 11. Which one of the following is a non-reducing carbohydrate?

  1. Maltose
  2. Sucrose
  3. Lactose
  4. Ribose-5-phosphate

Answer: 2. Sucrose

Question 12. Glutenin is an important protein in—

  1. Potato
  2. Wheat
  3. Soyabean
  4. Spinach

Answer: 2. Wheat

Question 13. One molecule of triglyceride is produced using—

  1. One fatty acid and one glycerol
  2. One fatty acid and three glycerols
  3. Three fatty acids and three glycerols
  4. Three fatty acids and one glycerol

Answer: 4. Three fatty acids and one glycerol

Question 14. Which one of the following is enriched with a non-reducing sugar?

  1. Grapes
  2. Germinating barley grains
  3. Table sugar
  4. Mother’s milk

Answer: 3. Table sugar

Question 15. Which of the following statements is wrong for sucrose?

  1. It is a disaccharide
  2. It is a non-reducing sugar
  3. It accumulates in the cytoplasm
  4. It is comprised of maltose and fructose

Answer: 4. It is comprised of maltose and fructose

Question 16. The protein component of a holoenzyme is known as~

  1. Co-enzyme
  2. Cofactor
  3. Prosthetic group
  4. Apoenzyme

Answer: 4. Apoenzyme

Question 17. Km is—

  1. Product
  2. Enzyme
  3. Constant
  4. Unit

Answer: 3. Constant

Question 18. Identify the incorrect match between the protein and its role—

  1. Keratin — Structural component of hair
  2. Immunoglobulins — Protection of body against diseases
  3. Haemoglobin — Transport of 02 in muscles
  4. Thrombin — Blood clotting

Answer: 3. Haemoglobin — Transport of 02 in muscles

Question 19. If T = 40%, C = 10%, then G =? in a pollen cell—

  1. 40%
  2. 10%
  3. 91%
  4. 20%

Answer: 2. 10%

Question 20. Lipids, which can be found in oil based salad dressings and ice cream, during digestion are splitted into-

  1. Fatty acids and glycerol
  2. Glycerol and amino acids
  3. Glucose and fatty acids
  4. Glucose and amino acids

Answer: 1. Fatty acids and glycerol

Question 21. Transition state structure of the substrate formed during an enzymatic reaction is—

  1. Transient but stable
  2. Permanent but unstable
  3. Transient and unstable
  4. Permanent and stable

Answer: 3. Transient and unstable

Question 22. A phosphoglyceride is always made up of—

  1. Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
  2. Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
  3. A glycerol molecule to which a phosphate group is also attached
  4. A saturated or unsaturated fatty acid esterified to a phosphate group, which is also attached to a glycerol molecule

Answer: A saturated or unsaturated fatty acid esterified to a phosphate group, which is also attached to a glycerol molecule

Question 23. Maximum number of enzymes are found in—

  1. Herbivores
  2. Carnivores
  3. Omnivores
  4. None of these

Answer: 3. Omnivores

Question 24. Holoenzyme is—

  1. Non-protein and apoenzyme
  2. Protein and apoenzyme
  3. Enzyme protein and coenzyme
  4. Enzyme non-protein and coenzyme

Answer: 3. Enzyme protein and coenzyme

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