Quiz | CancerQuest

Which of the following is FALSE? Cancer cells ______.

A.

Continue to divide despite multiple mutations in their DNA

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B.

May reproduce in the absence of growth factors

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C.

Are limited in their expansion by contact inhibition

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D.

May have a different number of chromosomes than neighboring normal cells

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E.

All of the above are correct statements.

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Which of the following is true for cancer cells?

A.

They may reproduce without signals from growth hormones.

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B.

They may not respond to failed checkpoints during cell division.

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C.

They engage in mitotic division in an unregulated fashion.

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D.

Unlike normal cells, cancer cells will divide even if there are not enough nutrients on the environment to support the new cells.

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E.

All of the above are correct

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Which of the following controls on cellular division are violated by cancer cells?

A.

Density dependent inhibition

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B.

Anchorage dependence

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C.

Proceeding without proper external signals

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D.

All of the above

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E.

None of the above

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Normal cells stop dividing when surrounded on all sides by other cells. This control on cell division is known as ______.

A.

Contact inhibition

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B.

The cell cycle control system

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C.

The platelet-derived growth factor response

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D.

The checkpoint factor limitation

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E.

Out-of-control growth inhibition

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DNA is replicated (copied) during the _______ phase of the cell cycle.

A.

M

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B.

G1

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C.

G2

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D.

Duplication

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E.

S

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The Cell Cycle

Many features of cancer cells are due to defects in genes that control cell division. Which of the following is not a stage in the cell cycle?

A.

G1

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B.

G2

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C.

G3

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D.

S

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E.

M

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The Cell Cycle

What factors ensure proper cell division?

A.

Cells must receive external signals

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B.

The DNA must be properly replicated

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C.

Cells must be surrounded on all sides by other cells

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D.

Cells must be able to divide infinitely without undergoing apoptosis

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E.

A and B

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The process by which a cell reproduces to create two identical copies of itself is known as ______.

A.

Metastasis

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B.

Meiosis

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C.

Telophase

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D.

Cell Cloning

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E.

Mitosis

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Cell Division

The reasons that cells enter mitosis include all of the following except:

A.

Replacement of cells that slough off our bodies

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B.

Wound healing

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C.

Replacement of cells with short life-spans

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D.

All of the above are correct

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E.

None of the above are reasons for mitosis to occur

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Cell Division

Which of the following is/are necessary for mitosis to successfully occur?

A.

Genetic material must be successfully copied via a process known as replication.

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B.

Organelles must be distributed so that each daughter cell receives an adequate amount to function.

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C.

The cytoplasm of the cell must be physically separated into two different cells.

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D.

A protein structure must attach homologous chromosomes tightly along their lengths in a process called synapsis.

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E.

A, B, and C.

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Cell Division