Question

Identify A and B in the diagram given below: 

 

• A. Valine and Lysine
• B. Serine and Glycine
• C. Serine and Tyrosine
• D. Proline and Serine

Hint:

Always cross-verify amino acid assignments with a reliable genetic code chart to prevent mistakes in translation.

Answer 1

The Correct Option is C

To solve this problem, we need to identify the amino acids corresponding to the codons and anticodons shown in the diagram.

1. Analyzing the Codons and Anticodons:
In the diagram, A has the anticodon UCA and B has the codon AUG. The anticodon and codon pair with complementary bases during the process of translation in protein synthesis.

2. Understanding the Pairing:
During translation, the anticodon (from the tRNA) pairs with the codon (from the mRNA) to add the correct amino acid to the growing polypeptide chain. The codon AUG is a start codon and codes for the amino acid methionine (Met). The anticodon UCA corresponds to a tRNA that would bring in the amino acid serine (Ser).

3. Identifying the Amino Acids:
From the pairing of the anticodon UCA and the codon AUG, we can identify A as serine (Ser) and B as tyrosine (Tyr) because UCA pairs with AGU, which codes for serine, and AUG pairs with UAC, which codes for tyrosine.

4. Conclusion:
Therefore, the correct identification for A and B is serine (Ser) and tyrosine (Tyr), respectively.

Final Answer:
The correct answer is Option C: A = Serine, B = Tyrosine.