BRCA1 and BRCA2 Are Considered to Be Tumour-Suppressor Genes Because

question 41

Multiple Choice

BRCA1 and BRCA2 are considered to be tumour-suppressor genes because

• A)they prevent infection by retroviruses that cause cancer.
• B)their normal products participate in repair of DNA damage.
• C)the mutant forms of either one of these promote breast cancer.
• D)the normal genes make estrogen receptors.
• E)they block penetration of breast cells by chemical carcinogens.

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Definitions:

Lancet

A small, sharp, and typically pointed surgical instrument used for making small incisions or punctures.

Semipermeable

Describes a barrier or membrane that allows certain substances to pass through it while blocking others.

Cell Wall

A rigid layer outside the plasma membrane of the cells of plants, fungi, and some bacteria, providing structural support and protection.

Plasma Membrane

The lipid bilayer that surrounds a cell, controlling the movement of substances in and out of the cell.