Open Question
What characteristic of the light-producing regulatory circuit is consistent with the idea that it may be a regulon? What characteristic of this circuit stretches the definition for a regulon?
16. Regulation of Expression
Prokaryotic Gene Regulation via Operons
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Altering patterns of gene expression in prokaryotes would likely increase a prokaryote's survival by _______.
A
Organizing gene expression, so that genes are expressed in a given order.
B
Allowing each gene to be expressed an equal number of times.
C
Allowing a prokaryote to adjust to changes in environmental conditions.
D
Allowing environmental changes to alter a prokaryote's genome.
Verified step by step guidance1
Understand the role of gene expression in prokaryotes: Gene expression in prokaryotes is crucial for their survival as it allows them to respond to environmental changes. Prokaryotes can rapidly adjust their gene expression to optimize their metabolic processes and adapt to new conditions.
Consider the impact of environmental changes: Prokaryotes often face fluctuating environments, such as changes in temperature, nutrient availability, or presence of toxins. Altering gene expression patterns enables them to efficiently respond to these changes, ensuring their survival.
Evaluate the options given: The first option suggests organizing gene expression in a specific order, which may not be as beneficial as being able to adjust to environmental changes. The second option implies equal expression of genes, which does not account for the need to prioritize certain genes under specific conditions.
Focus on the correct answer: The ability to adjust gene expression in response to environmental changes is the most advantageous for prokaryotes. This flexibility allows them to conserve energy and resources by expressing only the genes necessary for survival in a given environment.
Clarify the incorrect option: Allowing environmental changes to alter a prokaryote's genome is not a viable survival strategy. While mutations can occur, they are random and not a controlled response to environmental changes. Gene expression adjustment is a more immediate and reversible mechanism.
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