Multiple choice

Match entries in Group I (amino acids) with that in Group II (their metabolic precursors) and select the correct answer.

Group I
Group II
P. Tyrosine 1. Threonine
Q. Serine 2. Phenylalanine
R. Isoleucine 3. Glutamate
S. Proline 4. Glycerate 3-phosphate

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

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

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

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

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

Phenylalanine acts as metabolic precursor to tyrosine. Glycerate 3-phosphate acts as a precursor for serine which in turn, can act as precursor to create cysteine and glycine through the homocysteine cycle. Threonine acts as metabolic precursor to isoleucine. Glutamate acts as metabolic precursor to glutamic acid, proline and arginine.

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