Which of the following best describes the composition of the bacterial translation initiation complex?
A. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the P site, A site is open, GTP is bound by IF-2
B. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the P site, A site is open
C. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the A site, P site is open
D. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the A site, P site is open, GTP is bound by IF-2

Question

24-11-2022
Biology

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Which of the following best describes the composition of the bacterial translation initiation complex?
A. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the P site, A site is open, GTP is bound by IF-2
B. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the P site, A site is open
C. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the A site, P site is open
D. 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the A site, P site is open, GTP is bound by IF-2

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chrvynd chrvynd · Answer 1 · 2022-11-28T02:33:03+01:00

The one that best describes the composition of bacterial translation initiation complex is the 30S and 50S subunits, mRNA start codon paired with the anticodon of fMet-tRNAfMet, fMet-tRNAfMet bound in the P site, A site is open. Therefore, the correct answer is option B.

Translation initiation is a process in which tRNA ribosomal subunits are assembled by the eukaryotic initiation factors. In bacteria, translation initiation involves some components such as:

30S and 50S subunits as ribosomal subunits.
mature mRNA
tRNA
GTP or guanosine triphosphate as an energy source
IF1, IF2, and IF3 as prokaryotic initiation factors.

The p site is the place where peptidyl tRNA forms in the ribosome, while the A site is a point of entry for the tRNA (which is why it's open).

Learn more about translation initiation at https://brainly.com/question/3312865

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