Question

Arun thinks that identifying the exact mRNA sequence from the protein sequence is difficult. Is he correct and why?

(a) No, as the genetic code is universal.

(b) Yes, as the genetic code is degenerate.

(c) No, as the mRNA is translated into a protein sequence.

(d) Yes, as the mRNA contains introns which are non-coding sequences.

Answer 1

Correct answer is (b) Yes, as the genetic code is degenerate.

Explanation: Arun is correct. The genetic code is degenerate, meaning that multiple codons can code for the same amino acid. This degeneracy in the genetic code makes it difficult to uniquely determine the exact mRNA sequence from a given protein sequence. Different mRNA sequences can code for the same protein because of this redundancy in the genetic code.