Cell Cycle

Question: At the center of the cell cycle control system is Cdk, a protein that
[A].

is phosphorylated to become active

[B].

binds to different cyclins

[C].

is only active during mitosis

[D].

manufactures growth factors

Answer: Option B

Explanation:

No answer description available for this question.

Question: The cell cycle is controlled in most cells by
[A].

time (after a certain length of time the cell divides)

[B].

a series of checkpoints

[C].

cell size (when the cell reaches a certain size, it divides)

[D].

different cells exhibit different control strategies

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following statements about mitosis is incorrect?
[A].

The daughter nuclei are genetically identical to the parent nucleus

[B].

Chromosomes separate during anaphase due to the interaction of polar microtubules from opposite poles pushing against each other

[C].

Chromosomes separate during anaphase when the kinetochore microtubules shorten as they depolymerize

[D].

Chromosomes move to the metaphase plate using motor proteins, a kind of kinesin, attached to spindle fibers

Answer: Option B

Explanation:

No answer description available for this question.

Question: In which of the following phase preparations for genome separation are made?
[A].

C

[B].

G1

[C].

G2

[D].

M

Answer: Option D

Explanation:

No answer description available for this question.

Question: DNA replication is controlled at which of the following checkpoint?
[A].

G1

[B].

G2

[C].

M

[D].

S

Answer: Option A

Explanation:

No answer description available for this question.

Question: Microtubules grow from the poles to kinetochores of each chromatid during
[A].

prophase

[B].

metaphase

[C].

anaphase

[D].

telophase

Answer: Option A

Explanation:

No answer description available for this question.

Question: At the __________ checkpoint, cell growth is controlled.
[A].

C

[B].

G1

[C].

G2

[D].

S

Answer: Option B

Explanation:

No answer description available for this question.

Question: In which phase, each chromosome replicates to produce two sister chromatids?
[A].

Anaphase

[B].

Interphase

[C].

Metaphase

[D].

Prophase

Answer: Option B

Explanation:

No answer description available for this question.

Question: Each chromosome contains two chromatids by the end of the __________ phase in the life cycle of a human cell.
[A].

C

[B].

G2

[C].

M

[D].

S

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following triggers the division of activated T lymphocytes?
[A].

FGF

[B].

Interlukin 2

[C].

PDGF

[D].

Erythroprotein

Answer: Option B

Explanation:

No answer description available for this question.