Protein Synthesis
Protein synthesis rates in prokaryotes are limited by the rate of mRNA synthesis. If RNA synthesis occurs at the rate of 50 nucleotides/sec, then rate of protein synthesis occurs at

25 amino acids/sec
50 amino acids/sec
10 amino acids/sec
17 amino acids/sec

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

from the A (aminoacyl tRNA site) site to the P (peptidyl tRNA site) site on the ribosome
from the P site to the A site on the ribosome
from the P site to the E site on the ribosome
from the A site to the E (exit tRNA site) site on the ribosome

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