Question

1. use the mutated dna sequence to identify the mutated mrna sequence.

*use a= adenine, t= thymine, c= cytosine, g= guanine, u: uracil and make sure there is space between each codon.

original dna sequence	tac	gaa	ttt	acc	atc
original amino acid seq	met	leu	lys	trp	stop

mutated dna sequence	tac	gaa	tat	acc	atc
mutated amino acid seq

Explanation:

Step1: Transcribe DNA to mRNA

In transcription, DNA nucleotides pair with mRNA nucleotides as follows: A→U, T→A, C→G, G→C.

• TAC → AUG
• GAA → CUU
• TAT → AUA
• ACC → UGG
• ATC → UAG

Step2: Map mRNA to amino acids

Use standard codon rules:

• AUG = Met (Start)
• CUU = Leu
• AUA = Ile
• UGG = Trp
• UAG = Stop

Answer:

Mutated mRNA Sequence:

AUG CUU AUA UGG UAG

Mutated Amino Acid Seq:

Met Leu Ile Trp Stop