A Tumor Suppressor Gene Undergoes a Mutation That Causes It

question 20

Multiple Choice

A tumor suppressor gene undergoes a mutation that causes it to lose its normal function. What would be the most likely result of this mutation?

• A) The cell cycle halts and reverses back to the G₀ stage.
• B) The cell undergoes contact inhibition even when it is not surrounded by other cells.
• C) The cell cycle accelerates.
• D) The cell no longer responds to signals that cause it to stop dividing or undergo apoptosis.
• E) The cell stops dividing permanently and will never re-enter the cell cycle.

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Definitions:

Sand Dunes

Mounds or ridges of sand formed by the wind or sometimes by water flow, common in deserts and on beaches.

Crescent Shapes

Forms or structures that are shaped like a crescent moon, often found in dune and ripple markings.

Loess Deposits

Fine-grained, wind-blown sediments that can form thick, fertile soil layers.

Sediment

Particulate organic and inorganic matter that accumulates in a solid layer on the surface of land or within bodies of water.