Multiple Choice
Where in the cell does translation occur?
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15. Gene Expression
Introduction to Translation
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Which of the following statements best describes the ribosome binding site on the mRNA?
A
It is a sequence of nucleotides that codes for the start codon.
B
It is a sequence of nucleotides that signals the end of translation.
C
It is a sequence of nucleotides where the ribosome binds to initiate translation.
D
It is a sequence of nucleotides that is removed during mRNA splicing.
Verified step by step guidance1
Understand that the ribosome binding site (RBS) on mRNA is crucial for initiating translation, the process where ribosomes synthesize proteins using mRNA as a template.
Recognize that the RBS is not the start codon itself, but a specific sequence upstream of the start codon that helps position the ribosome correctly on the mRNA.
The RBS is often referred to as the Shine-Dalgarno sequence in prokaryotes, which is complementary to a sequence on the 16S rRNA of the ribosome, facilitating the binding of the ribosome to the mRNA.
Differentiate between the RBS and other mRNA sequences, such as those involved in splicing or signaling the end of translation, which serve different functions in mRNA processing and protein synthesis.
Conclude that the correct description of the ribosome binding site is: 'It is a sequence of nucleotides where the ribosome binds to initiate translation.' This highlights its role in the initiation phase of protein synthesis.
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