Biochemistry - Protein Synthesis

Exercise :: Protein Synthesis - Section 1

  • Protein Synthesis - Section 1
16. 

The direction of amino acid transfer to the growing polypeptide chain is

A. from the A (aminoacyl tRNA site) site to the P (peptidyl tRNA site) site on the ribosome
B. from the P site to the A site on the ribosome
C. from the A site to the E (exit tRNA site) site on the ribosome
D. from the P site to the E site on the ribosome

Answer: Option B

Explanation:

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17. 

The pathway of a tRNA during polypeptide elongation on the ribosome is

A. A site → P site → E site
B. P site → entry site → exit site
C. A site → P site → entry site
D. P site → A site → E site

Answer: Option A

Explanation:

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18. 

Which of the following has unusual bases?

A. mRNA
B. tRNA
C. rRNA
D. hnRNA

Answer: Option B

Explanation:

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19. 

The site on a bacterial chromosome that marks the termination point for chromosome replication is called

A. ter
B. a stop codon.
C. a stem-loop
D. pau

Answer: Option A

Explanation:

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20. 

Degenerated codon differs mostly in

A. the identities of their second base
B. the identities of their third base
C. the wobble position
D. both (b) and (c)

Answer: Option D

Explanation:

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