Multiple Choice
Which of these is a regulatory gene involved in the control of gene expression?
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16. Regulation of Expression
Introduction to Regulation of Gene Expression
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In what way can a riboswitch directly regulate translation?
A
By modifying the DNA sequence of the gene
B
By binding to the ribosome and preventing its assembly
C
By degrading the mRNA before it is translated
D
By altering the secondary structure of mRNA to expose or hide the ribosome binding site
Verified step by step guidance1
Understand the concept of a riboswitch: A riboswitch is a segment of mRNA that can bind a small target molecule, influencing the mRNA's function.
Recognize the role of riboswitches in gene regulation: Riboswitches can control gene expression by altering the mRNA's structure, affecting translation.
Identify the mechanism of translation regulation: Translation begins when the ribosome binds to the mRNA at the ribosome binding site (RBS).
Explore how riboswitches affect translation: A riboswitch can change the mRNA's secondary structure, either exposing or hiding the RBS, thus regulating ribosome access.
Conclude the regulation process: By altering the mRNA structure, riboswitches can directly control whether translation occurs, without modifying DNA or degrading mRNA.
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