You Isolate Cells from a Tumor and Study Them

question 1

Multiple Choice

You isolate cells from a tumor and study them.You observe that the cells continue dividing,even when DNA is damaged,when the cells become crowded,or even when nutrients run low.These observations lead you to suspect that the cells

• A) contain a proto-oncogene.
• B) contain an oncogene.
• C) contain a mutated tumor-suppressor gene.
• D) are infected by a virus.
• E) are breast-cancer cells.

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Definitions:

Immune System

The body's defense mechanism against infections, diseases, and other potentially damaging foreign bodies.

Foreign Invaders

External pathogens such as viruses, bacteria, and other microbes that can cause disease in a host organism.

White Blood Cells

Cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.

Leukocytes

White blood cells that are part of the immune system, helping the body to fight infections and other diseases.