Match List-I with List-II
|
List-I Amino acid |
List-II R group |
|
(A). Alanine |
(I). $-CH_3$ |
|
(B). Lysine |
(II). $HO-CH_2-$ |
|
(C). Serine |
(III). $H_2N-(CH_2)_4-$ |
|
(D). Cysteine |
(IV). $HS-CH_2-$ |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(I), (B)-(III), (C)-(II), (D)-(IV)
|
List-I Amino acid |
List-II R group |
|
(A). Alanine |
(I). $-CH_3$ |
|
(B). Lysine |
(III). $H_2N-(CH_2)_4-$ |
|
(C). Serine |
(II). $HO-CH_2-$ |
|
(D). Cysteine |
(IV). $HS-CH_2-$ |
Matching Breakdown
(A) Alanine $\rightarrow$ (I) $-CH_3$
Alanine is one of the simplest amino acids. Its R group is a basic methyl group.
(B) Lysine $\rightarrow$ (III) $H_2N-(CH_2)_4-$
Lysine is a basic amino acid. It features a long aliphatic chain ending in a primary amino group (butylamine side chain).
(C) Serine $\rightarrow$ (II) $HO-CH_2-$
Serine is a polar, uncharged amino acid. Its R group is a hydroxymethyl group, making it an alcohol.
(D) Cysteine $\rightarrow$ (IV) $HS-CH_2-$
Cysteine is unique because of its thiol (sulfhydryl) group. This allows it to form disulfide bridges in proteins.