For a Repressible Operon to Be Transcribed, Which of the Following

question 97

Multiple Choice

For a repressible operon to be transcribed, which of the following must occur?

• A) A corepressor must be present.
• B) RNA polymerase and the active repressor must be present.
• C) RNA polymerase must bind to the promoter, and the repressor must be inactive.
• D) RNA polymerase cannot be present, and the repressor must be inactive.
• E) RNA polymerase must not occupy the promoter, and the repressor must be inactive.

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Definitions:

Systolic Reading

The pressure in the arteries when the heart beats and fills them with blood.

Pulmonary Capillaries

Tiny blood vessels located in the lungs where gas exchange of oxygen and carbon dioxide occurs.

Perfusion

The process of delivering blood to a capillary bed in the biological tissue.

Diffusion

The process by which molecules intermingle as a result of their kinetic energy of random motion, leading to a net movement from a region of higher concentration to one of lower concentration.