Question

question 2 of 10
what role do trna molecules play in protein synthesis?
a. they carry amino acids to sites of protein synthesis.
b. they carry ribosomes to the mrna molecules.
c. they carry release factors to terminate translation.
d. they carry mrna molecules from the nucleus to the cytoplasm.

Explanation:

tRNA (transfer RNA) has an anticodon that pairs with mRNA codon. It binds to specific amino acids and transports them to ribosomes (sites of protein synthesis) during translation. Option B is incorrect as ribosomes are not carried by tRNA. Option C: release factors (not tRNA) terminate translation. Option D: mRNA is carried from nucleus to cytoplasm by nuclear pore complex (not tRNA). So, tRNA's role is carrying amino acids to protein - synthesis sites.

Answer:

A. They carry amino acids to sites of protein synthesis.