Question 1

High-energy radiation is often used to treat cancer.The radiation damages the cancerous cells, and the cell cycle checkpoint for DNA repair is overwhelmed.Radiation therefore

Accepted Answer

A)   causes apoptosis when cells are at the S and G2 checkpoints.
B)   inhibits the growth factor at the restriction point.
C)   blocks DNA replication.
D)   causes apoptosis only at the tumor site.
E)   kills all tumor cells without harming healthy cells.

Question 2

The number of chromosomes in a cell is reduced to half during

Accepted Answer

A)   interphase.
B)   meiosis I.
C)   meiosis II.
D)   fertilization.
E)   mitosis.

Question 3

In the sexual life cycle called alternation of generations, an organism spends roughly equal amounts of time in the _______ and the _______ stages.

Accepted Answer

A)   monosomic; trisomic
B)   haploid; monosomic
C)   haploid; diploid
D)   prokaryotic; eukaryotic
E)   haplontic; diplontic

Question 4

If n = 30 for a species of beetles, then a diploid cell would have a total of _______ chromosomes.

Accepted Answer

A)   1
B)   15
C)   30
D)   60
E)   90

Question 5

Refer to the figure showing a phase of mitosis.  What phase is shown here?

Accepted Answer

A)   Mitosis prophase
B)   Mitosis metaphase
C)   Mitosis anaphase
D)   Meiosis prophase I
E)   Meiosis prophase II

Question 6

A cell in G2 has 0.8 pg of DNA.How much DNA did that cell have in G1?

Accepted Answer

A)   0.4 pg
B)   0.8 pg
C)   1.6 pg
D)   1.6 pg in animals, but 3.2 pg in plants
E)   1.6 pg in plants, but 3.2 pg in animals

Question 7

Paclitaxel

Accepted Answer

A)   is an oncogene.
B)   prevents the functioning of microtubules in a cell.
C)   is a Cdk.
D)   acts as a negative regulator.
E)   produces a protein called E7. B

Question 8

At the milestone that defines anaphase, the chromosomes

Accepted Answer

A)   separate.
B)   come together.
C)   are at opposite poles.
D)   line up.
E)   cross over.

Question 9

Which phase of the cell cycle is not part of interphase?

Accepted Answer

A)   S
B)   G0
C)   G1
D)   G2
E)   M

Question 10

Refer to the figure showing two sexual life cycles.  Which sexual life cycle type is not illustrated, and what is an example of that type of organism?

Accepted Answer

A)   Haplontic; Rhizopus fungus
B)   Haplontic; a sheep
C)   Diplontic; a sheep
D)   Alternation of generations; a fern
E)   Alternation of generations; Rhizopus fungus

Question 11

At the end of the first meiotic division, each chromosome consists of

Accepted Answer

A)   chiasmata.
B)   a homologous chromosome pair.
C)   four copies of each DNA molecule.
D)   two chromatids.
E)   a pair of polar microtubules. D

Question 12

Which statement about necrosis is true?

Accepted Answer

A)   It requires ATP.
B)   It does not cause inflammation.
C)   It may occur when cells are damaged by toxins.
D)   It produces nucleosome-sized pieces of chromatin.
E)   It results in fragmentation of the cell.

Question 13

If a mutation renders a cyclin-Cdk more likely to phosphorylate RB, the result will be _______ (more/fewer) active RB molecules and more cells going through the checkpoint.

Accepted Answer

The answer of If a mutation renders a cyclin-Cdk more...

Question 14

In general, the division of the cell, which is called _______, follows immediately after mitosis.

Accepted Answer

The answer of In general, the division of the cell,...

Question 15

Caspases play a role in the process of

Accepted Answer

A)   autopolyploidy.
B)   allopolyploidy.
C)   aneuploidy.
D)   necrosis.
E)   apoptosis. E

Question 16

Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle.  At what point is the commitment made to another cell cycle?

Accepted Answer

Late in G1...

Question 17

Refer to the figure showing the artificial selection of wheat.  According to the figure, what is the ploidy level of the most modern form of wheat?

Accepted Answer

A)   1n
B)   2n
C)   3n
D)   4n
E)   6n

Question 18

DNA is _______ charged; thus, _______ amino acids in histones make histones more likely to bind DNA.

Accepted Answer

A)   positively; positively charged
B)   positively; neutral
C)   positively; negatively charged
D)   negatively; positively charged
E)   negatively; negatively charged

Question 19

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

Accepted Answer

A)   homologous pairing.
B)   meiosis and fertilization.
C)   mitosis and cytokinesis.
D)   karyotyping.
E)   crossing over.

Question 20

A mutation in _______ can lead to aneuploidy.

Accepted Answer

A)   a cyclin
B)   a Cdk
C)   cohesin
D)   caspases
E)   chromosome 21

Exam 11: The Cell Cycle and Cell Division

High-energy radiation is often used to treat cancer.The radiation damages the cancerous cells, and the cell cycle checkpoint for DNA repair is overwhelmed.Radiation therefore

Correct AnswerverifiedShow Answer

The number of chromosomes in a cell is reduced to half during

Correct AnswerverifiedShow Answer

In the sexual life cycle called alternation of generations, an organism spends roughly equal amounts of time in the _______ and the _______ stages.

Correct AnswerverifiedShow Answer

If n = 30 for a species of beetles, then a diploid cell would have a total of _______ chromosomes.

Correct AnswerverifiedShow Answer

Refer to the figure showing a phase of mitosis. What phase is shown here?

Correct AnswerverifiedShow Answer

A cell in G2 has 0.8 pg of DNA.How much DNA did that cell have in G1?

Correct AnswerverifiedShow Answer

Paclitaxel

Correct AnswerverifiedB

At the milestone that defines anaphase, the chromosomes

Correct AnswerverifiedShow Answer

Which phase of the cell cycle is not part of interphase?

Correct AnswerverifiedShow Answer

Refer to the figure showing two sexual life cycles. Which sexual life cycle type is not illustrated, and what is an example of that type of organism?

Correct AnswerverifiedShow Answer

At the end of the first meiotic division, each chromosome consists of

Correct AnswerverifiedD

Which statement about necrosis is true?

Correct AnswerverifiedShow Answer

If a mutation renders a cyclin-Cdk more likely to phosphorylate RB, the result will be _______ (more/fewer) active RB molecules and more cells going through the checkpoint.

Correct AnswerverifiedShow Answer

In general, the division of the cell, which is called _______, follows immediately after mitosis.

Correct AnswerverifiedShow Answer

Caspases play a role in the process of

Correct AnswerverifiedE

Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle. At what point is the commitment made to another cell cycle?

Correct AnswerverifiedLate in G1...View AnswerShow Answer

Refer to the figure showing the artificial selection of wheat. According to the figure, what is the ploidy level of the most modern form of wheat?

Correct AnswerverifiedShow Answer

DNA is _______ charged; thus, _______ amino acids in histones make histones more likely to bind DNA.

Correct AnswerverifiedShow Answer

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

Correct AnswerverifiedShow Answer

A mutation in _______ can lead to aneuploidy.

Correct AnswerverifiedShow Answer

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In the sexual life cycle called alternation of generations, an organism spends roughly equal amounts of time in the _ and the _ stages.

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B

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D

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E

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Late in G1...
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DNA is _ charged; thus, _ amino acids in histones make histones more likely to bind DNA.

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