Use the figure to answer the question.

The tRNA shown in the figure has its 3′ end projecting beyond its 5′ end. Which of the following processes will occur at this 3′ end?
A) The amino acid binds covalently.
B) The excess nucleotides (ACCA) will be cleaved off at the ribosome.
C) The small and large subunits of the ribosome will attach to it.
D) The 5′ cap of the mRNA will become covalently bound.

Question

Use the figure to answer the question.

The tRNA shown in the figure has its 3′ end projecting beyond its 5′ end. Which of the following processes will occur at this 3′ end?
A) The amino acid binds covalently.
B) The excess nucleotides (ACCA) will be cleaved off at the ribosome. 
C) The small and large subunits of the ribosome will attach to it. 
D) The 5′ cap of the mRNA will become covalently bound.

Quizplus · Accepted Answer

The 3′ end of the tRNA binds covalently to the amino acid during the process of aminoacylation, which occurs before the tRNA enters the ribosome. The excess nucleotides at the 3′ end and the entire 5′ end of the tRNA are not directly involved in this process. The small and large subunits of the ribosome attach to the mRNA, not to the tRNA directly. The 5′ cap of the mRNA does not bind to the tRNA at all.

Use the Figure to Answer the Question