Question

Match List-I with List-II. List-I: A. Ala amino acid, B. Arg amino acid, C. Asn amino acid, D. Trp amino acid. List-II: I. 6 codons, II. 2 codons, III. 4 codons, IV. 1 codon.

• A. A-II, B-III, C-I, D-IV
• B. A-III, B-II, C-IV, D-I
• C. A-III, B-I, C-II, D-IV
• D. A-I, B-III, C-IV, D-II

Hint:

Tryptophan has only one codon, arginine has six codons, alanine has four codons, and asparagine has two codons.

Answer 1

The Correct Option is C

Concept:
The genetic code is degenerate, meaning that more than one codon may code for the same amino acid.

Step 1: Alanine codons.
Alanine is coded by four codons: \[ GCU,\ GCC,\ GCA,\ GCG \] \[ A \rightarrow III \]

Step 2: Arginine codons.
Arginine is coded by six codons: \[ CGU,\ CGC,\ CGA,\ CGG,\ AGA,\ AGG \] \[ B \rightarrow I \]

Step 3: Asparagine codons.
Asparagine is coded by two codons: \[ AAU,\ AAC \] \[ C \rightarrow II \]

Step 4: Tryptophan codon.
Tryptophan is coded by only one codon: \[ UGG \] \[ D \rightarrow IV \] Thus, the correct matching is: \[ A-III,\ B-I,\ C-II,\ D-IV \] \[ \therefore \text{Correct Answer is (C)} \]