Sigma (σ)Factors Can Regulate the Initiation of Transcription

question 20

Multiple Choice

Sigma (σ) factors can regulate the initiation of transcription.Which of the following is not an example of σ regulation?

• A)Some σ factors recognize promoters for genes whose products are necessary when the organism is under stress, such as heat shock.
• B)Some σ factors recognize genes necessary for nitrogen utilization.
• C)Bacteriophages may code for specific σ factors that bind the core RNA polymerase and result in recognition of viral promoters.
• D)There are many σ sigma factors associated with eukaryotic organisms.

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Definitions:

Arousal

A physiological and psychological state of being awake, alert, and engaged, often as a response to stimuli.

Effective Task Performance

The degree to which tasks are completed successfully and efficiently, often measured against pre-established standards or goals.

Discord

A lack of agreement or harmony between people, ideas, or things, often leading to conflict or tension.

Significance

The degree to which a result, difference, or relationship is substantial or meaningful, often measured statistically in research.