Which of the Following Statements About Cancer Is Not True

question 10

Multiple Choice

Which of the following statements about cancer is not true?

• A)Cancer is very often associated with problems at the G₁ checkpoint.
• B)For a tumor to be defined as "cancer," it must first metastasize.
• C)Cancer cells often have a defective form of the tumor repressor p53.
• D)Many cancer cells have defective forms of the signal transduction protein Ras that do not become deactivated.

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Definitions:

Muscle Fiber

The individual contractile cells of a muscle, composed of myofibrils and capable of producing force and movement.

Agonist

A chemical substance that binds to and activates specific receptors on cells, leading to a biological response.

Body Movement

The physical action resulting from the contraction of muscles, enabling humans and animals to change their position or location.

Sarcoplasm

The cytoplasm of a muscle fiber that contains organelles, including mitochondria and the sarcoplasmic reticulum, involved in muscle contraction.