Multiple choice

Match the entries in Group - I (essential amino acids) with those in Group - II (corresponding functional groups/ side chains).

 
Group - I
Group - II
P. Histidine 1. hydroxy
Q. Leucine 2. isobuytyl
R. Threonine 3. imidazole
S. Tryptophan 4. indole

  1. P - 3, Q - 2, R - 1, S - 4

  2. P - 3, Q - 4, R - 1, S - 2

  3. P - 3, Q - 4, R - 2, S - 1

  4. P - 1, Q - 2, R - 3, S - 4

  5. P - 2, Q - 1, R - 3, S - 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as the correct matching is P - 3, Q - 5, R - 1, S - 4. Histidine is alpha amino acid. The conjugate acid of the imidazole side chain. Leucine is a branched-chain α-amino acid with the chemical formula HO2CCH (NH2) CH2CH (CH3)2.  Leucine is hydrophobic in nature dut to the presence of aliphatic isobutyl side chain. Threonine is an α-amino acid with the chemical formula HO2CCH (NH2) CH (OH )CH3. This essential amino acid is classified as polar. Together with serine, threonine is one of two proteinogenic amino acids bearing an alcohol group (OH group). Tryptophan is one of the 22 standard amino acids and is an essential amino acid in the human diet. It has indole as fuctional group.

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