JEE & NEETNEET Biology NEET Biology 11 th & 12 th 100+ MCQ & Answer | Page-03 | JEE & NEET MCQ 04/02/2025 DSN MARATHI Last Updated on: 28/10/2025 21. Which of the following amino acids has to be supplemented in the diet? A. phenylalanine B. cysteine C. glutamine D. asparagine Answer Option : A 22. Which of the following amino acids is not necessary to be taken in the diet? A. histidine B. threonine C. serine D. lysine Answer Option : C 23. Amino acids with aromatic side chain are A. tryptophan, asparagine, tyrosine B. tryptophan, threonine, tyrosine C. phenylalanine, tryptophan, serine D. phenylalanine, tryptophan, tyrosine Answer Option : D 24. Which among the following is not polymeric? A. Carbohydrate B. Nucleic acids C. Proteins D. Lipids Answer Option : D 25. The naturally occurring proteins consist of A. D- amino acid B. L – amino acid C. both a and b D. none of these Answer Option : B 26. The first amino acid of any polypeptide chain in eukaryotes is A. valine B. methionine C. glycine D. alanine Answer Option : B 27. Amino Acid are mostly synthesised from A. fatty acid B. mineral salts C. 𝜶-ketoglutaric acid D. volatile acids Answer Option : C 28. An amino acid yielding acetyl CoA during catabolism is A. ketogenic B. glucogenic C. essential D. both glucogenic and ketogenic Answer Option : A 29. The simples amino acid is A. Glycine B. Alanine C. asparagine D. Tyrosine Answer Option : A 30. Amino acids with aliphatic ‘R’ group are A. Glycine, alanine, leucine B. Serine, threonine, cysteine C. Lysine , arginine , histidine D. Phenylalanine, tyrosine and tryptophan Answer Option : A
21. Which of the following amino acids has to be supplemented in the diet? A. phenylalanine B. cysteine C. glutamine D. asparagine Answer Option : A
22. Which of the following amino acids is not necessary to be taken in the diet? A. histidine B. threonine C. serine D. lysine Answer Option : C
23. Amino acids with aromatic side chain are A. tryptophan, asparagine, tyrosine B. tryptophan, threonine, tyrosine C. phenylalanine, tryptophan, serine D. phenylalanine, tryptophan, tyrosine Answer Option : D
24. Which among the following is not polymeric? A. Carbohydrate B. Nucleic acids C. Proteins D. Lipids Answer Option : D
25. The naturally occurring proteins consist of A. D- amino acid B. L – amino acid C. both a and b D. none of these Answer Option : B
26. The first amino acid of any polypeptide chain in eukaryotes is A. valine B. methionine C. glycine D. alanine Answer Option : B
27. Amino Acid are mostly synthesised from A. fatty acid B. mineral salts C. 𝜶-ketoglutaric acid D. volatile acids Answer Option : C
28. An amino acid yielding acetyl CoA during catabolism is A. ketogenic B. glucogenic C. essential D. both glucogenic and ketogenic Answer Option : A
30. Amino acids with aliphatic ‘R’ group are A. Glycine, alanine, leucine B. Serine, threonine, cysteine C. Lysine , arginine , histidine D. Phenylalanine, tyrosine and tryptophan Answer Option : A
