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What is the result of translation in the process of gene expression?
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15. Gene Expression
Introduction to Translation
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Which step of translation is depicted when the ribosome assembles around the start codon and the initiator tRNA binds to the mRNA?
A
Termination
B
Initiation
C
Elongation
D
Transcription
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Understand the process of translation, which is the synthesis of proteins from mRNA. Translation occurs in three main stages: initiation, elongation, and termination.
Focus on the initiation stage of translation. This is the step where the ribosome assembles around the start codon of the mRNA, which is typically AUG, coding for methionine.
Learn that during initiation, the initiator tRNA carrying methionine binds to the start codon on the mRNA strand. This binding occurs in the ribosome's P site.
Recognize that initiation is distinct from elongation, where amino acids are added to the growing polypeptide chain, and termination, where the process ends upon reaching a stop codon.
Conclude that the step described in the problem, where the ribosome assembles around the start codon and the initiator tRNA binds to the mRNA, corresponds to the initiation stage of translation.
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