Question

a silent mutation changes the nucleotide sequence without changing the amino acids coded by the nucleotide bases. the table shows the various mrna codons that code for different amino acids. which mutation taking place in the codons can be called a silent mutation? aac→caa agg→gga gag→aga uua→cuu

Explanation:

Check each option using the provided mRNA - amino acid codon table. A silent mutation means the new codon codes for the same amino acid as the original codon.

• For AAC $\to$ CAA: AAC codes for Asn and CAA codes for Gln.
• For AGG $\to$ GGA: AGG codes for Arg and GGA codes for Gly.
• For GAG $\to$ AGA: GAG codes for Glu and AGA codes for Arg.
• For UUA $\to$ CUU: Both UUA and CUU code for Leu.

Answer:

UUA $\to$ CUU