Question

Use the given information to select the amino acid attached to the 3′ end of tRNA during the process of translation, if the coding strand of the structural gene being transcribed has the nucleotide sequence TAC.
 

• A. Isoleucine
• B. Methionine
• C. Tyrosine
• D. Valine

Hint:

Always remember: the codon table is based on mRNA, not DNA. So convert the DNA coding strand to mRNA before matching it to codons.

Answer 1

The Correct Option is C

Step 1: The given sequence is from the coding strand, which is TAC.
Step 2: The template strand (used for mRNA synthesis) is complementary to the coding strand, so it will be ATG.
Step 3: During transcription, mRNA is synthesized using the template strand, so the mRNA sequence becomes UAC.
Step 4: According to the codon table, the mRNA codon UAC codes for the amino acid Tyrosine.