Question

The second and further aminoacyl-tRNAs are brought to the ribosome bound to which of the following protein complex?

• A. EF-Ts-ATP
• B. EF-Ts-GTP
• C. EF-Tu-ATP
• D. EF-Tu-GTP

Answer 1

Answer:

D. EF-Tu-GTP

The aminoacyl-tRNAs are brought to the ribosome bound to EF-Tu-GTP.

After its binding to the mRNA GTP hydrolysis releases EF-Tu-GDP. EF-Tu is then recycled with the help of EF-Ts.