Statement I: The codon 'AUG' codes for methionine and phenylalanine.

Statement II: 'AAA' and 'AAG' are both codons that code for the amino acid lysine.

In light of the above statements, choose the correct answer from the options given below.

Correct Answer: 1)

Concept:

• There are certain rules followed for the translation of messenger RNA into proteins known as genetic code.
• It is a combination of codons formed by the three nucleotides that codes for a protein.

Statement I: The codon 'AUG' codes for methionine and phenylalanine.

• This statement is false, AUG codes only for methionine amino acid.
• One codon codes for specific amino acids only but one amino acid can be coded by more than one codon.
• So, codons are unambiguous and specific.

Statement II: AAA and 'AAG' both codons code for the amino acid lysine.

• This statement is true, one amino acid can be coded by more than one codon.
• Lysine amino acids can be coded by AAA and AAG both.
• So, codons are degenerate.

So, the correct answer is 1.