Question

which of these changes to the dna triplet 3 aat 5 will cause the translation to stop? a aaa b aag c att d gat

Explanation:

Step1: Transcribe DNA to mRNA

The DNA triplet 3' AAT 5' is transcribed to mRNA as 5' UUA 3'.

Step2: Analyze each option

• Option A: DNA triplet 3' AAA 5' transcribes to mRNA 5' UUU 3', which codes for Phenylalanine.
• Option B: DNA triplet 3' AAG 5' transcribes to mRNA 5' UUC 3', which codes for Phenylalanine.
• Option C: DNA triplet 3' ATT 5' transcribes to mRNA 5' UAA 3'. In the genetic code table, UAA is a STOP codon.
• Option D: DNA triplet 3' GAT 5' transcribes to mRNA 5' CUA 3', which codes for Leucine.

Answer:

C. ATT