Which, If Any, of the Following Statements Is False

question 4

Multiple Choice

Which, if any, of the following statements is false?

• A) The p53 tumor suppressor regulates the G₂-M transition in the cell cycle by inhibiting the CDK2-cyclin E complex.
• B) p53 regulates the CDK2-cyclin E complex by stimulating the p21 tumor suppressor.
• C) The CDK2-cyclin E complex relies on stimulation by the E2F transcription factor.
• D) The RB1 protein normally binds the E2F transcription factor to prevent it working and so acts as a brake on the cell cycle

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Definitions:

Endothelial Tubes

Tube-like structures formed by endothelial cells that line the interior surface of blood vessels and lymphatic vessels.

Interventricular Septum

Wall between the ventricles of the heart.

Interatrial Septum

Wall between the atria of the heart.

Blood Islands

Clusters of developing blood cells and vessels found in the embryonic yolk sac.