Evaluating tRNA Structure Statements

Steps:

• Identify key tRNA features: amino acid binding at 3' CCA end, ribosome interaction via structural sites, ribose-phosphate backbone with phosphodiester bonds, and anticodon complementary to mRNA.
• Assess statement 1: Correct, as tRNA has distinct sites for amino acid attachment and ribosome binding during translation.
• Assess statement 2: Correct, describing the standard RNA backbone structure, despite incomplete phrasing.
• Assess statement 3: Incorrect, as the anticodon is complementary to the mRNA codon, not identical to the transcribed DNA triplet (template strand).

Why B is correct:

• B selects statements 1 and 2, aligning with tRNA's defined structure in molecular biology, where amino acid and ribosome sites enable translation, and the backbone provides stability.

Why the others are wrong:

• A includes incorrect statement 3.
• C omits valid statement 2 on the backbone.
• D includes incorrect statement 3.

Final answer: B