tRNA Function in Translation

Steps:

• Statement 1: tRNA anticodon forms hydrogen bonds with mRNA codon, temporarily holding tRNA to mRNA during translation.
• Statement 2: tRNA anticodon sequence is complementary (not identical) to mRNA codon sequence, enabling base pairing.
• Statement 3: Aminoacyl-tRNA synthetases are specific enzymes that attach the correct amino acid (e.g., glycine) to its matching tRNA.
• Correct statements are 1 and 3, corresponding to option C.

Why C is correct:

• C selects statements 1 and 3, which accurately describe tRNA-mRNA binding via hydrogen bonds and enzyme specificity in charging tRNA, per the central dogma of molecular biology.

Why the others are wrong:

• A includes 2, but tRNA sequences are complementary, not identical, to mRNA.
• B includes 2, which misstates sequence complementarity as identity.
• D excludes 1, but hydrogen bonding is essential for codon-anticodon recognition.

Final answer: C