Which One of the Following Statements About the Transcription Attenuation

question 35

Multiple Choice

Which one of the following statements about the transcription attenuation mechanism is true?

• A)In some operons (e.g. ,the his operon),attenuation may be the only regulatory mechanism.
• B)Sequences of the trp operon leader RNA resemble an operator.
• C)The leader peptide acts by a mechanism that is similar to that of a repressor protein.
• D)The leader peptide gene of the trp operon includes no Trp codons.
• E)The leader peptide is an enzyme that catalyzes transcription attenuation.

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Definitions:

Phosphorus

A chemical element, essential for life, involved in many cellular processes, including energy transfer and the structure of DNA and RNA.

Inhalation

The act of drawing air or other substances into the lungs.

Primary Consumers

Organisms that feed directly on producers in a food chain, typically herbivores that eat plants.

Trophic Level

The position an organism occupies in a food chain, indicating its level of feeding and energy transfer.