Question 1

During which phase(s)  of mitosis are chromosomes composed of two sister chromatids?

Accepted Answer

A)   prophase and prometaphase only
B)   prophase, prometaphase, and metaphase
C)   prophase, prometaphase, metaphase, and anaphase
D)   anaphase and telophase only
E)   all phases of mitosisF) C) and D)
G) None of the above

Question 2

Which statement best describes the difference between cell division in plant and animal cells?

Accepted Answer

A)   Cytokinesis occurs by formation of a cleavage furrow in animal cells, but not plant cells.
B)   Cytokinesis occurs by formation of a cleavage furrow in plant cells, but not animal cells.
C)   Centrosomes play an important role in spindle formation in plant cells, but not in animal cells.
D)   Chromosome replication occurs during interphase in animal cells, while in plant cells, replication occurs when the nuclear envelope disintegrates.
E)   Animal cells divide via the cell cycle whereas plant cells divide by binary fission.F) C) and D)
G) B) and D)

Question 3

Most cancers require at least two mutations: 1)  one in an oncogene, which encodes proteins that trigger cell division, and 2)  one in a tumor suppressor gene, whose protein products, in their unmutated form, play a key role in preventing the cell cycle from progressing if the DNA is damaged or in the absence of specific cues. Which class of proteins might be considered tumor suppressors?

Accepted Answer

A)   Cdk inhibitors
B)   cyclins
C)   growth factor receptors
D)   microtubules
E)   transcription factorsF) A) and B)
G) A) and D)

Question 4

Chromosomes are in a condensed form at which stage(s)  of the cell cycle?

Accepted Answer

A)   prophase only
B)   prophase and metaphase
C)   interphase
D)   all stages of interphase and mitosis
E)   throughout mitosis until late telophaseF) C) and D)
G) D) and E)

Question 5

Figure 10.1
- Answer the following questions using the accompanying figure.

Identify the stage of mitosis shown in panel B.

Accepted Answer

A)   interphase
B)   prophase
C)   metaphase
D)   anaphase
E)   telophaseF) A) and B)
G) A) and C)

Question 6

Oncogenes are often ____.

Accepted Answer

A)   mutant forms of cell cycle genes
B)   normal forms of cell cycle genes
C)   needed for normal cells to metastasize
D)   required for normal contact inhibition of cells
E)   not involved in cell divisionF) A) and E)
G) A) and D)

Question 7

Loosely packed regions of DNA associated with histones are called ____.

Accepted Answer

A)   euchromatin
B)   heterochromatin
C)   chromosomes
D)   nucleosomes
E)   30-nm chromatin fibersF) D) and E)
G) C) and D)

Question 8

Chromosomes decondense into chromatin at which point in the cell cycle?

Accepted Answer

A)   at the beginning of S phase
B)   at the end of interphase
C)   at the beginning of prophase
D)   at the beginning of metaphase
E)   at the end of telophaseF) A) and E)
G) B) and D)

Question 9

When growth factors bind to receptors on the cell surface, the signaling cascade will ____.

Accepted Answer

A)   initiate cell growth
B)   prevent cell division
C)   trigger cell death
D)   cause the cells to enter the G0state
E)   trigger mitosis without the other stages of the cell cycleF) A) and D)
G) B) and C)

Question 10

Compared to the parent cell, each of two daughter cells that result from normal mitotic division contains ____ chromosomes and is genetically ____.

Accepted Answer

A)   the same number of; different
B)   the same number of; identical
C)   half the number of; different
D)   half the number of; identical
E)   double the number of; identicalF) A) and D)
G) All of the above

Question 11

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen?

Accepted Answer

A)   The cell undergoes repeated cytokinesis but not mitosis.
B)   The cell undergoes repeated mitotic divisions with concomitant cytokinesis.
C)   The cell undergoes repeated mitotic divisions but not cytokinesis.
D)   The cell undergoes anaphase twice before entering telophase.
E)   The cell goes through multiple S phases before entering mitosis.F) C) and D)
G) None of the above

Question 12

At the conclusion of S phase, a diploid cell with 40 chromosomes will have ____ chromosomes and _____ sister chromatids.

Accepted Answer

A)   20; 40
B)   20; 20
C)   40; 40
D)   40; 80
E)   80; 80F) A) and B)
G) B) and D)

Question 13

The separation of duplicated chromosomes into two new nuclei is known as ____.

Accepted Answer

A)   mitosis
B)   cytokinesis
C)   binary fission
D)   meiosis
E)   fertilizationF) A) and D)
G) A) and E)

Question 14

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ) , inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____.

Accepted Answer

A)   anaphase
B)   interphase
C)   prophase
D)   telophase
E)   metaphaseF) C) and D)
G) C) and E) E

Question 15

In order to understand how chromosomes move during anaphase of mitosis, researchers tagged ____ with a fluorescent label before photobleaching the cell and examining chromosomal movement under a microscope.

Accepted Answer

A)   DNA
B)   kinetochore microtubules
C)   nonkinetochore microtubules
D)   histones
E)   motor proteinsF) A) and E)
G) C) and D)

Question 16

Organisms that reproduce asexually usually do so through the process of ____.

Accepted Answer

A)   mitosis
B)   meiosis
C)   gametogenesis
D)   spore formation
E)   fertilizationF) B) and C)
G) A) and B)

Question 17

In plants, the microtubules organizing centers are comprised of microtubules.

Accepted Answer

A) True 
 B)False  True

Question 18

One of the three internal cell cycle checkpoints occurs during ____ and monitors ____.

Accepted Answer

A)   the G1/S transition; mitotic spindle integrity
B)   late S phase; the presence of DNA damage
C)   the G2/M transition; the presence of DNA damage
D)   the G2/M transition; mitotic spindle integrity
E)   anaphase; the presence of DNA damageF) A) and B)
G) A) and C)

Question 19

Figure 10.1
- Answer the following questions using the accompanying figure.

Identify the stage of mitosis shown in panel E.

Accepted Answer

A)   interphase
B)   prophase
C)   metaphase
D)   anaphase
E)   telophaseF) A) and D)
G) A) and E)

Question 20

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions?

Accepted Answer

A)   2
B)   4
C)   8
D)   16
E)   32F) A) and D)
G) B) and E) D

Exam 10: Cell Division and Mitosis

During which phase(s) of mitosis are chromosomes composed of two sister chromatids?

Correct Answer
verified

Which statement best describes the difference between cell division in plant and animal cells?

Correct Answer
verified

Correct Answer
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Chromosomes are in a condensed form at which stage(s) of the cell cycle?

Correct Answer
verified

Figure 10.1 - Answer the following questions using the accompanying figure. Identify the stage of mitosis shown in panel B.

Correct Answer
verified

Oncogenes are often ____.

Correct Answer
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Loosely packed regions of DNA associated with histones are called ____.

Correct Answer
verified

Chromosomes decondense into chromatin at which point in the cell cycle?

Correct Answer
verified

When growth factors bind to receptors on the cell surface, the signaling cascade will ____.

Correct Answer
verified

Compared to the parent cell, each of two daughter cells that result from normal mitotic division contains chromosomes and is genetically .

Correct Answer
verified

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen?

Correct Answer
verified

At the conclusion of S phase, a diploid cell with 40 chromosomes will have chromosomes and _ sister chromatids.

Correct Answer
verified

The separation of duplicated chromosomes into two new nuclei is known as ____.

Correct Answer
verified

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ) , inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____.

Correct Answer
verified
E

In order to understand how chromosomes move during anaphase of mitosis, researchers tagged ____ with a fluorescent label before photobleaching the cell and examining chromosomal movement under a microscope.

Correct Answer
verified

Organisms that reproduce asexually usually do so through the process of ____.

Correct Answer
verified

In plants, the microtubules organizing centers are comprised of microtubules.

Correct Answer
verified
True

One of the three internal cell cycle checkpoints occurs during and monitors .

Correct Answer
verified

Figure 10.1 - Answer the following questions using the accompanying figure. Identify the stage of mitosis shown in panel E.

Correct Answer
verified

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions?

Correct Answer
verified
D

Exam 10: Cell Division and Mitosis

During which phase(s) of mitosis are chromosomes composed of two sister chromatids?

Correct AnswerverifiedShow Answer

Which statement best describes the difference between cell division in plant and animal cells?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Chromosomes are in a condensed form at which stage(s) of the cell cycle?

Correct AnswerverifiedShow Answer

Figure 10.1 - Answer the following questions using the accompanying figure. Identify the stage of mitosis shown in panel B.

Correct AnswerverifiedShow Answer

Oncogenes are often ____.

Correct AnswerverifiedShow Answer

Loosely packed regions of DNA associated with histones are called ____.

Correct AnswerverifiedShow Answer

Chromosomes decondense into chromatin at which point in the cell cycle?

Correct AnswerverifiedShow Answer

When growth factors bind to receptors on the cell surface, the signaling cascade will ____.

Correct AnswerverifiedShow Answer

Compared to the parent cell, each of two daughter cells that result from normal mitotic division contains ____ chromosomes and is genetically ____.

Correct AnswerverifiedShow Answer

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen?

Correct AnswerverifiedShow Answer

At the conclusion of S phase, a diploid cell with 40 chromosomes will have ____ chromosomes and _____ sister chromatids.

Correct AnswerverifiedShow Answer

The separation of duplicated chromosomes into two new nuclei is known as ____.

Correct AnswerverifiedShow Answer

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ) , inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____.

Correct AnswerverifiedE

In order to understand how chromosomes move during anaphase of mitosis, researchers tagged ____ with a fluorescent label before photobleaching the cell and examining chromosomal movement under a microscope.

Correct AnswerverifiedShow Answer

Organisms that reproduce asexually usually do so through the process of ____.

Correct AnswerverifiedShow Answer

In plants, the microtubules organizing centers are comprised of microtubules.

Correct AnswerverifiedTrue

One of the three internal cell cycle checkpoints occurs during ____ and monitors ____.

Correct AnswerverifiedShow Answer

Figure 10.1 - Answer the following questions using the accompanying figure. Identify the stage of mitosis shown in panel E.

Correct AnswerverifiedShow Answer

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions?

Correct AnswerverifiedD

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Compared to the parent cell, each of two daughter cells that result from normal mitotic division contains chromosomes and is genetically .

Correct Answer
verified

Correct Answer
verified

At the conclusion of S phase, a diploid cell with 40 chromosomes will have chromosomes and _ sister chromatids.

Correct Answer
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Correct Answer
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E

Correct Answer
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Correct Answer
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Correct Answer
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True

One of the three internal cell cycle checkpoints occurs during and monitors .

Correct Answer
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Correct Answer
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Correct Answer
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D