If a Cell Stops at the G ₁ Checkpoint, This

question 5

Multiple Choice

If a cell stops at the G ₁ checkpoint, this is most likely due to what problem?

• A) there is DNA damage
• B) the DNA has not finished replicating
• C) the chromosomes are not aligned properly
• D) the cell is cancerous
• E) the chromosomes are not properly attached to the spindle

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Definitions:

Menstrual Cycle

The regular natural change that occurs in the female reproductive system that makes pregnancy possible.

Estrogen

A group of hormone compounds mainly responsible for the development and regulation of female sex characteristics and reproductive functioning.

Testosterone

A primary male sex hormone that plays key roles in the development of male reproductive tissues, secondary sexual characteristics, and the regulation of libido.

Somatostatin

A hormone that inhibits the release of several other hormones, playing a critical role in the regulation of the digestive system and the maintenance of hormonal balance.