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A G protein that forms a complex with GTP and aminoacyl-tRNA to deliver it to the A site of the ribosome. 5% of total protein in E. coli.

A. EF-Tu
B. EF-G
C. EF-P
D. EF-1

User Stys
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1 Answer

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Final answer:

EF-Tu is the G protein that complexes with GTP and aminoacyl-tRNA, aiding in delivering the tRNA to the A site of the ribosome during the elongation phase of protein synthesis in E. coli. The correct option is A.

Step-by-step explanation:

The G protein in question, which forms a complex with GTP and aminoacyl-tRNA to deliver it to the A site of the ribosome, is an important factor in the elongation phase of protein synthesis in E. coli. Within this process, the EF-Tu protein binds to aminoacyl-tRNA along with GTP to facilitate its entry into the A site of the ribosome.

After the aminoacyl-tRNA is placed, GTP is hydrolyzed, releasing EF-Tu to be recycled for another round of elongation. This protein is integral to the efficiency of translation, which allows E. coli to add amino acids to the growing polypeptide chain very rapidly.

User Robin Stewart
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