Molecular-Basis-Of-Inheritance Question 215
Question: Which step of translation does not consume a high energy phosphate bond?
Options:
A) Translocation
B) Amino acid activation
C) Peptidyl-transferase reaction
D) Aminoacyl tRNA binding to active ribosomal site
Show Answer
Answer:
Correct Answer: D
Solution:
[d] During the activation of amino acids, in the presence of $ M{g^{2+}} $ and ATP an amino acid gets attached to a specific enzyme aminoacyl t-RNA synthetase.
Pyrophosphate is released which breaks up to release energy.
During translocation, in the presence of the enzyme translocase and energy from GTP the ribosome moves in such a way that the peptidyl bearing t-RNA of A - site comes to lie; on the P-site, exposing a new codon at A site.
In the peptidyl transferase reaction energy is provided by GTP.
BETA
