How Does a Cell Typically Know When to Divide

question 69

Multiple Choice

How does a cell typically know when to divide?

• A)Cells have an internal clock and divide only when they reach a certain age.
• B)Tumor suppressor genes code for growth factor proteins that initiate cell division.
• C)Proto-oncogenes code for growth factor proteins that initiate cell division.
• D)Oncogenes code for growth factor proteins that initiate cell division.

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Definitions:

Feldspar Rich

Referring to rocks or minerals containing a high proportion of feldspar, a group of silicate minerals that are among the most abundant in the Earth's crust.

Rayed Crater

A type of crater characterized by radiating lines or bands of debris thrown out by the impact that formed the crater.

Mare

A dark, low-lying, relatively smooth area on the Moon consisting of basalt.

Lunar Highlands

Rough, mountainous regions on the moon's surface, characterized by their lighter color and higher altitude than the lunar maria.