Important MCQs on Biomolecules

Important MCQs on Biomolecules

Que 1. Which of the following statements is not correct?
i) Some antiseptics can be added to soaps.
ii) Dilute solutions of some disinfectants can be used as antiseptics.
iii) Disinfectants are antimicrobial drugs.
iv) Antiseptic medicines can be ingested.
Ans 1. (iv)

Que 2. Which is the correct statement about birth control pills?
i) Contain estrogen only.
ii) Contain progesterone only.
iii) Contain a mixture of estrogen and progesterone derivatives.
iv) Progesterone enhances ovulation.
Ans 2. (iii)

Que 3. Which statement about aspirin is not true
i) Aspirin belongs to narcotic analgesics.
ii) It is effective in relieving pain.
iii) It has anti-blood-clotting action.
iv) It is a neurologically active drug.
Ans 3. (i)

Que 4. Which of the following chemicals can be added for sweetening of food items at cooking temperature and does not provide calories?
i) Sucrose
ii) Glucose
iii) Aspartame
iv) Sucralose
Ans 4. (iv)

Que 5. Which of the following will not enhance the nutritional value of food?
i) Minerals
ii) Artificial sweeteners
iii) Vitamins
iv) Amino acids
Ans 5. (ii)

Que 6. Salvarsan is an arsenic-containing drug that was first used for the treatment of_______.
i) Syphilis
ii) Typhoid
iii) Meningitis
iv) Dysentery
Ans 6. (i)

Que 7. A narrow spectrum antibiotic is active against _______________.
i) Gram-positive or gram-negative bacteria.
ii) Gram-negative bacteria only.
iii) Single organism or one disease.
iv) Both gram-positive and gram-negative bacteria.
Ans 7.  (ii)

Que 8. The compound that causes general antidepressant action on the central nervous system belongs to the class of _____________.
i) Analgesics
ii) Tranquilizers
iii) Narcotic analgesics
iv) Antihistamines A
Ans 8. (ii)

Que 9. Compound which is added to soap to impart antiseptic properties is _________.
i) Sodium lauryl sulphate
ii) Sodium dodecylbenzenesulphonate
iii) Rosin
iv) Bithional
Ans 9. (iv)

Que 10. Equanil is __________.
i) Artificial sweetener
ii) Tranquilizer
iii) Antihistamine
iv) Antifertility drug
Ans 10. (ii)

Important MCQs on Biomolecules

Que 11. Which of the following enhances the leathering property of soap?
i) Sodium carbonate
ii) Sodium resinate
iii) Sodium stearate
iv) Trisodium phosphate
Ans 11. (ii)

Que 12. Glycerol is added to soap. It functions ______________.
i) As a filler
ii) To increase leathering
iii) To prevent rapid drying
iv) To make soap granules.
Ans 12. (iii)

Que 13. Which of the following compounds are administered as antacids?
i) Sodium carbonate
ii) Sodium hydrogen carbonate
iii) Aluminium carbonate
iv) Sodium Chloride
Ans 13. (ii)

Que 14. Polyethylene glycols are used in the preparation of which type of detergents?
i) Cationic detergents
ii) Anionic detergents
iii) Non-ionic detergents
iv) Soaps
Ans 14. (iii)

Que 15. Which of the following is not a target molecule for drug function in the body?
i) Carbohydrates
ii) Lipids
iii) Vitamins
iv) Proteins
Ans 15. (iii)

Important MCQs on Biomolecules

Que 16. Which of the following reagents does not react with glucose?
a) NH2OH
b) HCN
c) 2,4 –DNP reagent
d) Br2 water
Ans 16. (c)

Que 17. The number of chiral carbons in ß-D (+) glucose is
a) Five
b) Two
c) Four
d) Six
Ans 17. (a)

Que 18. Which of the following nitrogenous bases is not present in RNA?
a) Adenine
b) Cytosine
c) Guanine
d) Thymine
Ans 18. (d)

Que 19. The helical structure or a secondary structure of proteins is stabilized by:
a) Peptide bonds
b) Dipeptide bonds
c) H-bond
d) Ether bond
Ans 19. (c)

Que 20. Which of the following is/are example(s) of denaturation of protein?
a) Coagulation of egg white
b) Curdling of milk
c) Clotting of blood
d) Both (a) and (b)
Ans 20. (d)

Important MCQs on Biomolecules

Que 21. The spatial arrangement of two or more polypeptide chains with respect to each other is known as
a) Primary structure
b) Secondary structure
c) Tertiary structure
d) Quaternary structure
Ans 21. (d)

Que 22. Nucleotides are joined together by
a) Glycosidic bond
b) Peptide linkage
c) Hydrogen bonding
d) Phosphodiester linkage
Ans 22. (d)

Que 23. Oxime is formed by treating glucose with
a) Water
b) Nitric acid
c) Bromine water
d) Hydroxylamine
Ans 23. (d)

Que 24. Peptides upon hydrolysis give
a) Amines
b) Amino acids
c) Ammonia
d) None of these
Ans 24. (b)

Que 25. Which amino acid has no asymmetric carbon atom?
a) Histidine
b) Glycine
c) Alanine
d) Threonine
Ans 25. (b)

Important MCQs on Biomolecules

Que 26. Glucose when reacts with HI and red phosphorus gives
a) n-hexane
b) n-heptane
c) n-pentane
d) n-octane
Ans 26. (a)

Que 27. Which one of the following is an essential amino acid?
a) Cysteine
b) Serine
c) Tyrosine
d) Isoleucine
Ans 27. (d)

Que 28. Which of the following protein is globular:
a) Collagen
b) Albumin
c) Myosin
d) Fibroin
Ans 28. (b)

Que 29. Proteins are condensation polymers of
a) Alpha-amino acids
b) Beta amino acids
c) Alpha hydroxy acids
d) Beta hydroxyl acids
Ans 29. (a)

Que 30. Coagulation of proteins is known as
a) Dehydration
b) Decay
c) Deamination
d) Denaturation
Ans 30. (d)

Assertion Reason type

Important MCQs on Biomolecules

A. Both assertion and reason are correct statements and reason is the correct explanation of the assertion.
B. Both assertion and reason are correct statements and reason is not the correct explanation of the assertion
C. Assertion is correct but the reason is the wrong statement
D. Assertion is wrong but the reason is a correct statement

Que 31. Assertion: The pentaacetate of glucose does not react with hydroxylamine
Reason: Glucose contains a free aldehyde group
Ans 31. (C)

Que 32. Assertion: In zwitterionic form, amino acids show amphoteric behavior.
Reason: Amino acids in zwitterionic form react with acid and base both.
Ans 32. (A)

Que 33. Assertion: Glucose is a ketohexose
Reason: Glucose contains six carbon atoms and an aldehyde group
Ans 33. (D)

Important MCQs on Biomolecules

Que 34. Assertion: Glucose is a monosaccharide
Reason: Glucose cannot be hydrolyzed further to give a simpler unit of polyhydroxy aldehyde or ketone.
Ans 34. (A)

Que 35. Assertion: DNA is responsible for maintaining the identity of different species of organisms over millions of years
Reason: DNA is the chemical basis of heredity and may be regarded as the reserve of genetic information.
Ans 35.  (A)

Important MCQs on Biomolecules


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