PG NEET Biochemistry Mcqs 6 – Amino Acids

1.Amino acid that is phosphorylated is

  1. serine
  2. cysteine
  3. glycine
  4. alanine

Ans (1)

2. Ninhydrin is a reagent used in the detection of

  1. ketone bodies
  2. blood sugar
  3. blood urea
  4. alpha-amino acids

Ans (4)

3. Structural proteins are involved in maintaining the shape of the cell or in the formation of matrices in the body. Thr shape of these proteins is

  1. globular
  2. fibrous
  3. stretch of beads
  4. planar

Ans (2)

4. Glutathione is a

  1. dipeptide
  2. polypeptide
  3. tripeptide
  4. oligopeptide

Ans (3)

5. Plasma protein which binds and transports free fatty acids is

  1. prealbumin
  2. albumin
  3. transthyretin
  4. ceruloplasmin

Ans (2)

6. In sickle cell anemia, the genetic defect lies with amino acid residue at 6th position and replaced by

  1. Glu by leucine in alpha chain
  2. Glu by leucine in beta chain
  3. asp by valine in the beta chain
  4. asp by leucine in the beta chain

Ans (2)

7. Amino acid involved in transmethylation reaction

  1. S Adenosine methionine
  2. cysteine
  3. tryptophan
  4. tyrosine

Ans (1)

8. Nonheme iron-containing protein is

  1. myoglobin
  2. catalase
  3. ferritin
  4. cytochrome oxidase

Ans (3)

9. For the transcription of selenocysteine, codon is

  1. UGA
  2. UAA
  3. UAG
  4. GUA

Ans (1)

10. Which is not a method of protein precipitation

  1. salting out with metals
  2. acetone and alcohol
  3. changing ph other than isoelectric ph
  4. trichloroacetic acid

Ans (3)

11. One among the following is a semi essential amino acid

  1. valine
  2. histidine
  3. arginine
  4. leucine

Ans (2)

12. Imino acid among the following is

  1. tyrosine
  2. glycine
  3. proline
  4. alanine

Ans (3)

13. One among the following is not an uncharged amino acid

  1. aspartic acid
  2. tyrosine
  3. serine
  4. cysteine

Ans (1)

14. Amino acid that can be converted into glucose

  1. leucine
  2. lysine
  3. methionine
  4. none

Ans (3)

15. The key biological compound derived from glycine-arginine methionine

  1. glutathione∝
  2. carnitine∝
  3. creatine∝
  4. niacin∝

Ans (3)

16. True about naturally occurring amino acids are

1. All are racemic mixtures
2. have specific genetic code
3. all are D isomers
4. all are L isomers

Ans (2)

17. Amino acid with two chiral carbon is

  1. Phenylalanine
  2. Valine
  3. Threonine
  4. Tryptophan

Ans (3)

18. 21st amino acid is

  1. Serine
  2. Selenocysteine
  3. Glutamine
  4. Ornithine

Ans (2)

19. Selenocysteine is derived from

  1. cysteine
  2. cystine
  3. serine
  4. alanine

Ans (3)

20.  Cystine is formed from

  1. hydroxylation of cysteine molecules
  2. carboxylation of cysteine molecules
  3. peptide bond between two cysteine molecules
  4. the disulfide bond between two cysteine molecules

(4)

21. Keratin in the nail is exceptionally stronger than others because

  1. calcification
  2. van der wals force
  3. ionic bond
  4. disulfide bond

Ans (4)

22. One of the following is an example of phosphoprotein

  1. histone
  2. casein
  3. ceruloplasmin
  4. albumin

Ans (2)

23. At physiological ph the carboxy terminal of a peptide is

  1. positively charged
  2. negatively charged
  3. neutral
  4. infinitely charged

Ans (2)

24. Which of the following is a derived protein

  1. protamines
  2. peptones
  3. prolamines
  4. lactalbumin

Ans (2)

25. Shortest peptide is

  1. angiotensin 111
  2. vasopressin
  3. angiotensin 11
  4. angiotensin 1

Ans (1)

26. Amino acid that is phosphorylated is

  1. serine
  2. cysteine
  3. glycine
  4. alanine

Ans (1)

27. Ninhydrin is a reagent used in the detection of

  1. ketone bodies
  2. blood sugar
  3. blood urea
  4. alpha-amino acids

Ans (4)

28. Structural proteins are involved in maintaining the shape of the cell or in the formation of matrices in the body. Thr shape of these proteins is

  1. globular
  2. fibrous
  3. stretch of beads
  4. planar

Ans (2)

29. Glutathione is a

  1. dipeptide
  2. polypeptide
  3. tripeptide
  4. oligopeptide

Ans (3)

30. Plasma protein which binds and transports free fatty acids is

  1. prealbumin
  2. albumin
  3. transthyretin
  4. ceruloplasmin

Ans (2)

16. In sickle cell anemia, the genetic defect lies with amino acid residue at 6th position and replaced by

  1. Glu by leucine in alpha chain
  2. Glu by leucine in beta chain
  3. asp by valine in the beta chain
  4. asp by leucine in the beta chain

Ans (2)

31.  Amino acid involved in transmethylation reaction

  1. S Adenosine methionine
  2. cysteine
  3. tryptophan
  4. tyrosine

Ans (1)

32. Nonheme iron-containing protein is

  1. myoglobin
  2. catalase
  3. ferritin
  4. cytochrome oxidase

Ans (3)

33. For the transcription of selenocysteine, codon is

  1. UGA
  2. UAA
  3. UAG
  4. GUA

Ans (1)

34. Which is not a method of protein precipitation

  1. salting out with metals
  2. acetone and alcohol
  3. changing ph other than isoelectric ph
  4. trichloroacetic acid

Ans (3)

35. One among the following is a semi essential amino acid

  1. valine
  2. histidine
  3. arginine
  4. leucine

Ans (2)

36. Imino acid among the following is

  1. tyrosine
  2. glycine
  3. proline
  4. alanine

Ans (3)

37. One among the following is not an uncharged amino acid

  1. aspartic acid
  2. tyrosine
  3. serine
  4. cysteine

Ans (1)

38. Amino acid that can be converted into glucose

  1. leucine
  2. lysine
  3. methionine
  4. none

Ans (3)

39. The key biological compound derived from glycine-arginine methionine

  1. glutathione∝
  2. carnitine∝
  3. creatine∝
  4. niacin∝

Ans (3)

40. Polar amino acids are all except

  1. glutamic acid
  2. histidine
  3. glutamine
  4. methionine

Ans (4)

41. Guanidinium group is associated with

1. Tyrosine
2. Arginine
3. histidine
4. lysine

Ans (2)

42. Indole ring is present in

  1. tryptophan
  2. tyrosine
  3. phenylalanine
  4. threonine

Ans (1)

43. Simplest amino acid is

  1. tryptophan
  2. valine
  3. glycine
  4. arginine

Ans (3)

44. Amino acids with its pKa value within physiological range is

  1. glycine
  2. histidine
  3. lysine
  4. arginine

Ans (2)

45. Aromatic amino acids are

  1. tryptophan
  2. homocysteine
  3. arginine
  4. ornithine

Ans (1)

46. Sulfur-containing amino acid is

  1. ornithine
  2. asparagine
  3. methionine
  4. glycine

Ans (3)

47. Basic amino acids are

  1. alanine
  2. histidine
  3. glutamine
  4. leucine

Ans (2)

48. Following are polar amino acids are

  1. isoleucine
  2. serine
  3. arginine
  4. histidine

Ans (1)

49. Which of the following is polar

  1. isoleucine
  2. methionine
  3. glutamic acid
  4. tryptophan

Ans (3)

50. Neutral amino acids are

  1. aspartate
  2. arginine
  3. glycine
  4. histidine

Ans (3)

40. Polar amino acids are all except

  1. glutamic acid
  2. histidine
  3. glutamine
  4. methionine

Ans (4)

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