Use the following information to answer the next few questions. A transfer RNA (

Question

Use the following information to answer the next few questions. A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing the other tRNA (#2) in the ribosome already. Which component of the complex described enters the exit tunnel through the large subunit of the ribosome? A) tRNA that no longer has attached amino acid B) tRNA with attached lysine (#1) C) initiation and elongation factors D) tRNA with polypeptide (#2) E) newly formed polypeptide Where does tRNA #2 move to after this bonding of lysine to the polypeptide? A) A site B) E site C) P site D) directly to the cytosol E) exit tunnel

Explanation / Answer

Answer:

A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the other tRNA (#2) in the ribosome already.

1) Which component of the complex described enters the exit tunnel through the large subunit of the ribosome?
A) tRNA that no longer has attached amino acid
B) tRNA with attached lysine (#1)
C) initiation and elongation factors
D) tRNA with polypeptide (#2)
E)  newly formed polypeptide - Correct Answer (the newly formed polypeptide emerges from the exit tunnel)

2) Where does tRNA #2 move to after this bonding of lysine to the polypeptide?

A) A site
B) E site - Correct Answer (tRNA moves from site A to P to E for completing the process of delivery of amino acids during the translation, and in the E site the tRNA exits the ribosome)
C) P site
D) directly to the cytosol
E) exit tunnel

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