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 contains a CCA sequence which binds covalently to an amino acid during the process of aminoacylation. This aminoacylated tRNA will then bring the corresponding amino acid to the ribosome for protein synthesis. The excess nucleotides (ACCA) are not cleaved off at the ribosome, as they are important for tRNA recognition and function. The small and large subunits of the ribosome will attach to the mRNA, not the tRNA. The 5′ cap of the mRNA does not become covalently bound to the tRNA.

Use the Figure to Answer the Question