In Which One of the Following Ways Does a Proto-Oncogene

question 36

Multiple Choice

In which one of the following ways does a proto-oncogene differ from an oncogene?

• A) Proto-oncogenes code for proteins that regulate the expression of structural genes; oncogenes code for nucleic acids involved in cell division.
• B) Proto-oncogenes control normal cell division; oncogenes contribute to the development of cancer.
• C) When oncogenes become damaged, they become proto-oncogenes.
• D) Oncogenes activate tumor suppressor genes; proto-oncogenes repress tumor suppressor genes.
• E) Proto-oncogenes cause cells to self-destruct when damaged; oncogenes cause damaged cells to repair themselves.

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Definitions:

Reticular Formation

A network of neurons located in the brainstem that is critical for regulating wakefulness and sleep-wake transitions.

Neurotransmitter

Chemicals in the brain that transmit signals from one neuron to another, affecting mood, thought processes, and physical actions.

Adenosine

A chemical found in the body that plays a role in promoting sleep and suppressing arousal, and is also a component of RNA.

Acetylcholine

A neurotransmitter in the nervous system that plays a critical role in muscle contraction and the modulation of alertness, memory, and learning.