Question

a table containing some of the scientists data is shown.
a. fill in the original strand boxes in the table based on the amino acid produced.
b. fill in the mutated strand boxes in the table based on the dna sequence.

coding dna strand	dna sequence	mrna sequence	amino acid produced
b. mutated strand	tcc

Explanation:

Step1: Recall Amino Acid Codons

The amino acid Tryptophan (Trp) is coded by the mRNA codon UGG.

Step2: Determine Original DNA Strand (Coding)

In DNA, the coding strand (original strand here) has the same sequence as mRNA except T replaces U. So for mRNA UGG, the coding DNA strand (original) is TGG. The non - coding (template) DNA strand would be ACC (since A - T, C - G pairing), but we need the coding (original) strand which matches mRNA (with T instead of U), so original DNA strand (coding) is TGG, mRNA is UGG.

Step3: Analyze Mutated Strand (B)

The mutated DNA strand is TCC. To find mRNA, we transcribe DNA to mRNA: T→A, C→G, C→G. So mRNA from TCC is AGG. Then, we find the amino acid for AGG. Looking at codon table, AGG codes for Arginine (Arg).

Answer:

Part A

• Original Strand (DNA Sequence): TGG
• mRNA Sequence: UGG

Part B

• mRNA Sequence: AGG
• Amino Acid Produced: Arg