MCQ on Amino Acids Pdf :
- Amino acids are organic substances that present in their constitution two different functional groups: a carboxyl (referring to carboxylic acids) and an amino (referring to the amine).
- There are 20 common α-amino acids: alanine, arginine, aspartate, asparagine, cysteine, phenylalanine, glycine, glutamate, glutamine, histidine, isoleucine, leucine, lysine, methionine, proline, serine, tyrosine, threonine, tryptophan and valine.
- However, 9 amino acids cannot synthesized by the human body cannot synthesize thats why they are called essential amino acids such as histidine, lysine, leucine, methionine, isoleucine, phenylalanine, threonine, tryptophan and valine.
- These must be obtained from the balance diet.
- The other 11 are produced by the body itself and are called non-essential amino acids.
- Specifically, essential amino acids are important for our body because they participate in Production of red blood cells, Antibody production, Production of important hormones etc.
MCQ Questions on Amino Acids :
1. Which of the following is not a macromolecule?
(1) Amino acid
(2) Nucleotide
(3) Monosaccharide
(4) All the above
Answer: 4
(1) Amino acid
(2) Nucleotide
(3) Monosaccharide
(4) All the above
Answer: 4
2. The simplest amino acid is_______
(1) Glycine
(2) Alanine
(3) Asparagine
(4) Tyrosine
Answer: 1
3. Amino acids are mostly synthesised from_______
(1) fatty acids
(2) mineral salts
(3) 𝜶-ketoglutaric acid
(4) volatile acids
Answer: 3
4. Amino acids with the aliphatic ‘R’ group are_______
(1) Glycine, alanine, leucine
(2) Serine, threonine, cysteine
(3) Lysine, arginine, histidine
(4) Phenylalanine, tyrosine and tryptophan
Answer: 1
5. Valine amino acids is –
(1) a-AA
(2) b-AA
(3) g-AA
(4) All the three types
Answer: 1
6. alpha -amino acids are those, which –
(1) Participates in protein synthesis
(2) –COOH group and –NH2 group are attached on same carbon
(3) 20 types
(4) All the above are correct
Answer: 4
7. Which of the following is correct statement ?
(1) Amino acids may be considered as substituted methane
(2) alpha -AA have difference only in R group
(3) In serine, R-group is hydroxy methyl
(4) All the above
Answer: 4
8. Which of the following essential amino acids is not synthesized by the body?
(1) Arginine
(2) Glutamine
(3) Histidine
(4) Proline
Answer: 3
9. Which of the following is an imino acid?
(1) Alanine
(2) Glycine
(3) Proline
(4) Serine
Answer : 3
10. Which among the following is a non-essential amino acid?
(1) Serine
(2) Threonine
(3) Lysine
(4) Histidine
Answer: 1
11. The difference between amino acid and imino acid is________
(1) Bonding of carbonyl group with the amide group
(2) Bonding of nitrogen in the amide group
(3) Bonding of nitrogen in the carbonyl group
(4) Presence of covalent bond between amide and carbonyl group
Answer: 2
12. Which of the following are sulfur-containing amino acids?
(1) Cysteine and methionine
(2) Methionine and threonine
(3) Cysteine and threonine
(4) Cysteine and serine
Answer: 1
13. Which among the following is both glucogenic and ketogenic?
(1) Isoleucine
(2) Leucine
(3) Lysine
(4) Histidine
Answer: 1
14. What is the R group in Glycine?
(1) –CH2–OH
(2) –H
(3) –CH3
(4) None of them
Answer: 2
15. Which of the following is acidic amino acid?
(1) Valine
(2) Glutamic acid
(3) Arginine
(4) Lysine
Answer: 2
16. Amino acids with aromatic side chain are____________
(1) tryptophan, asparagine, tyrosine
(2) tryptophan, threonine, tyrosine
(c) phenylalanine, tryptophan, serine
(d) phenylalanine, tryptophan, tyrosine
Answer: 4
17. Which of the following is aromatic AA?
(1) Tyrosine
(2) Tryptophan
(3) Phenyl alanine
(4) All the above
Answer: 4
18. How many total carbons ar present in palmitic acid?
(1) 15
(2) 16
(3) 17
(4) 20
Answer: 2