1. Which among the following is not polymeric?
(a) Carbohydrates
(b) Nucleic acids
(c) Proteins
(d) Lipids
Answer: (d) Lipids
2. The simplest amino acid is
(a) Glycine
(b) Alanine
(c) Asparagine
(d) Tyrosine
Answer: (a) Glycine
3. Amino acids are mostly synthesised from
(a) fatty acids
(b) mineral salts
(c) -ketoglutaric acid
(d) volatile acids
Answer:(c) -ketoglutaric acid
4. Amino acids with the aliphatic ‘R’ group are
(a) Glycine, alanine, leucine
(b) Serine, threonine, cysteine
(c) Lysine, arginine, histidine
(d) Phenylalanine, tyrosine and tryptophan
Answer: (a) Glycine, alanine, leucine
5. Which of the following amino acids is not necessary to be taken in the diet?
(a) histidine
(b) threonine
(c) serine
(d) lysine
Answer: (c) serine
6. An amino acid yielding acetyl CoA during catabolism is
(a) ketogenic
(b) glucogenic
(c) essential
(d) both glucogenic and ketogenic
Answer: (a) ketogenic
7. The first amino acid of any polypeptide chain in eukaryotes is
(a) valine
(b) methionine
(c) glycine
(d) alanine
Answer:(b) methionine
8. Amino acids with aromatic side chain are
(a) tryptophan, asparagine, tyrosine
(b) tryptophan, threonine, tyrosine
(c) phenylalanine, tryptophan, serine
(d) phenylalanine, tryptophan, tyrosine
Answer: (d) phenylalanine, tryptophan, tyrosine
9. The naturally occurring proteins consist of
(a) D-amino acids
(b) L-amino acids
(c) both (a) and (b)
(d) none of these
Answer: (b) L-amino acids
10. Which of the following amino acids has to be supplemented in the diet?
(a) phenylalanine
(b) cysteine
(c) glutamine
(d) asparagine
Answer: (a) phenylalanine
