Multiple Choice
In the process of translation, what does tRNA bring to the ribosome to enable protein synthesis?
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15. Gene Expression
Introduction to Translation
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In the process of translation, which site on the ribosome is responsible for reading the open codon and bringing in the new tRNA molecule?
A
P site
B
R site
C
A site
D
E site
Verified step by step guidance1
Understand the process of translation: Translation is the process by which ribosomes synthesize proteins using mRNA as a template. It involves decoding the mRNA sequence into a polypeptide chain.
Identify the ribosome structure: A ribosome has three sites important for translation - the A (aminoacyl) site, the P (peptidyl) site, and the E (exit) site.
Determine the function of each site: The A site is where the new tRNA carrying an amino acid enters the ribosome. The P site holds the tRNA with the growing polypeptide chain. The E site is where the tRNA, now without an amino acid, exits the ribosome.
Focus on the A site: The A site is specifically responsible for reading the open codon on the mRNA and bringing in the corresponding tRNA molecule with the correct amino acid.
Conclude the role of the A site: Since the A site is responsible for decoding the mRNA and bringing in new tRNA molecules, it is the correct answer to the question about which site reads the open codon and brings in the new tRNA.
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