Most Cancers Require at Least Two Mutations: 1) One in an Oncogene

question 12

Multiple Choice

Most cancers require at least two mutations: 1) one in an oncogene, which encodes proteins that trigger cell division, and 2) one in a tumor suppressor gene, whose protein products, in their unmutated form, play a key role in preventing the cell cycle from progressing if the DNA is damaged or in the absence of specific cues. Which class of proteins might be considered tumor suppressors?

• A) Cdk inhibitors
• B) cyclins
• C) growth factor receptors
• D) microtubules
• E) transcription factors

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Definitions:

Foraging Time

The period spent by an animal searching for and gathering food.

Territoriality

Behavior in animals that involves the establishment and defense of a territory to claim exclusive use and resources.

Dominance

An attribute of an allele that masks the effect of a recessive allele paired with it in the phenotype of the organism.

Sexual Behavior

Actions related to how organisms reproduce, often influenced by biological, psychological, and social factors.