Question

The mRNA codons for amino acids is shown in the diagram in the Data Sheet.
A mutagen causes the adenine in DNA to pair with cytosine during DNA transcription. Which tripeptide will be synthesized when the DNA fragment ACCTCGAAT is used in protein synthesis in the presence of this mutagens?
(A) alanine - serine - glycine
(B) arginine - serine - proline
(C) asparagine - glycine - arganine
(D) serine - cysteine - proline

Support your answer with explanations.

Answer 1

clue 1: it says that the mutation cause the adenine to pair with cytocine and not with uracil..... during the transcription........
clue 2: given DNA sequence is ACCTCGAAT. when this trancribes with the mutation. the trancript will be CGGAGCCCA and can be represented as CGG AGC CCA, which codes for
Arginine-Serine-Proline. Hence the option (B) is correct one