Question 1

Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?

Accepted Answer

A)   kinetochores
B)   Golgi-derived vesicles
C)   actin and myosin
D)   centrioles and centromeres
E)   tubulin and dyneinF) A) and D)
G) C) and E)

Question 2

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely ________.

Accepted Answer

A)   an animal cell in the process of cytokinesis
B)   a plant cell in the process of cytokinesis
C)   an animal cell in the S phase of the cell cycle
D)   a bacterial cell dividing
E)   a plant cell in metaphaseF) B) and E)
G) A) and D)

Question 3

The following question(s)  are based on the accompanying figure. 
-In the figure, G1 is represented by which numbered part(s)  of the cycle?

Accepted Answer

A)   I or V
B)   II or IV
C)   III only
D)   IV only
E)   V onlyF) B) and E)
G) A) and C)

Question 4

Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, its effectiveness must be related to ________.

Accepted Answer

A)   disruption of mitotic spindle formation
B)   inhibition of regulatory protein phosphorylation
C)   suppression of cyclin production
D)   myosin denaturation and inhibition of cleavage furrow formation
E)   inhibition of DNA synthesisF) A) and B)
G) B) and D)

Question 5

Myosin is a motor protein involved in animal cell cytokinesis. It binds to ATP or ADP, causing the myosin to move with respect to actin. What is the effect of the interaction between myosin and actin?

Accepted Answer

A)   Vesicles containing plasma membrane constituents are transported to the metaphase plate, where cytokinesis takes place.
B)   Excess cytoplasm is removed.
C)   The cleavage furrow deepens.
D)   Two new daughter nuclei form.E) A) and C)
F) A) and D)

Question 6

Use the following information to answer the question(s)  below.
Nucleotides can be radiolabeled before they are incorporated into newly forming DNA and, therefore, can be assayed to track their incorporation. In a set of experiments, a student-faculty research team used labeled T nucleotides and introduced these into the culture of dividing human cells at specific times.
-In eukaryotic cells, chromosomes are composed of ________.

Accepted Answer

A)   DNA and RNA
B)   DNA only
C)   DNA and proteins
D)   DNA and phospholipidsE) None of the above
F) B) and D)

Question 7

Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have  times more DNA than G1 phase cells. The cells of this group are ________.

Accepted Answer

A)   between the G1 and S phases in the cell cycle
B)   in the G2 phase of the cell cycle
C)   in the M phase of the cell cycle
D)   in the S phase of the cell cycleE) B) and D)
F) B) and C)

Question 8

Use the data in the accompanying table to answer the following question(s) .
-The best conclusion concerning delta is that the cells ________.

Accepted Answer

A)   contain no DNA
B)   contain no RNA
C)   contain only one chromosome that is very short
D)   are in the G0 phase
E)   divide in the G1 phaseF) A) and E)
G) B) and D)

Question 9

The following question(s)  are based on the accompanying figure. 
-In the figure, at which of the numbered regions would you expect to find cells at metaphase?

Accepted Answer

A)   I and IV
B)   II only
C)   III only
D)   IV only
E)   V onlyF) C) and D)
G) B) and D)

Question 10

Which cytoskeletal proteins are important constituents of the contractile structures that form the cleavage furrows involved in animal cell cytokinesis?

Accepted Answer

A)   actin
B)   dynein
C)   tubulin
D)   myosinE) A) and C)
F) A) and B)

Question 11

What happens if MPF (mitosis-promoting factor)  is introduced into immature frog oocytes that are arrested in G2?

Accepted Answer

A)   Nothing happens.
B)   The cells undergo meiosis.
C)   The cells enter mitosis.
D)   Cell differentiation is triggered.E) All of the above
F) B) and D)

Question 12

In human and many other eukaryotic species' cells, the nuclear membrane has to disappear to permit ________.

Accepted Answer

A)   cytokinesis
B)   the attachment of microtubules to kinetochores
C)   the splitting of the centrosomes
D)   the disassembly of the nucleolusE) B) and D)
F) A) and C)

Question 13

Kinetochore microtubules assist in the process of splitting centromeres by ________.

Accepted Answer

A)   using motor proteins to split the centromere at specific arginine residues
B)   creating tension by pulling toward opposite poles
C)   sliding past each other like actin filaments
D)   phosphorylating the centromere, thereby changing its conformationE) B) and C)
F) A) and B)

Question 14

At which phase are centrioles beginning to move apart in animal cells?

Accepted Answer

A)   telophase
B)   anaphase
C)   prometaphase
D)   metaphase
E)   prophaseF) B) and E)
G) C) and D)

Question 15

-In the accompanying figure, MPF reaches its highest concentration during this stage.

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) A) and E)
G) A) and C)

Question 16

Use the data in the accompanying table to answer the following question(s) .
-Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is that ________.

Accepted Answer

A)   gamma contains more DNA than beta
B)   beta and gamma contain the same amount of DNA
C)   beta cells reproduce asexually
D)   beta are in the G0 phase
E)   beta is a plant cell and gamma is an animal cellF) A) and B)
G) B) and E)

Question 17

If there are 20 chromatids in a cell, how many centromeres are there?

Accepted Answer

A)   10
B)   20
C)   30
D)   40
E)   80F) C) and E)
G) B) and E)

Question 18

Which of the following does NOT occur during mitosis?

Accepted Answer

A)   condensation of the chromosomes
B)   replication of the DNA
C)   separation of sister chromatids
D)   spindle formation
E)   separation of the spindle polesF) A) and C)
G) A) and E)

Question 19

Movement of the chromosomes during anaphase would be most affected by a drug that prevents ________.

Accepted Answer

A)   nuclear envelope breakdown
B)   cell-wall formation
C)   elongation of microtubules
D)   shortening of microtubules
E)   formation of a cleavage furrowF) All of the above
G) A) and E)

Exam 12: The Cell Cycle

Movement of the chromosomes during anaphase would be most affected by a drug that prevents ________.

Correct Answer
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Correct Answer
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Use the data in the accompanying table to answer the following question(s) . -Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is that ________.

Correct Answer
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Myosin is a motor protein involved in animal cell cytokinesis. It binds to ATP or ADP, causing the myosin to move with respect to actin. What is the effect of the interaction between myosin and actin?

Correct Answer
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Use the data in the accompanying table to answer the following question(s) . -The best conclusion concerning delta is that the cells ________.

Correct Answer
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The following question(s) are based on the accompanying figure. -In the figure, at which of the numbered regions would you expect to find cells at metaphase?

Correct Answer
verified

Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, its effectiveness must be related to ________.

Correct Answer
verified

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely ________.

Correct Answer
verified

Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?

Correct Answer
verified

-In the accompanying figure, MPF reaches its highest concentration during this stage.

Correct Answer
verified

Kinetochore microtubules assist in the process of splitting centromeres by ________.

Correct Answer
verified

What happens if MPF (mitosis-promoting factor) is introduced into immature frog oocytes that are arrested in G2?

Correct Answer
verified

Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have times more DNA than G1 phase cells. The cells of this group are ________.

Correct Answer
verified

Which cytoskeletal proteins are important constituents of the contractile structures that form the cleavage furrows involved in animal cell cytokinesis?

Correct Answer
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At which phase are centrioles beginning to move apart in animal cells?

Correct Answer
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In human and many other eukaryotic species' cells, the nuclear membrane has to disappear to permit ________.

Correct Answer
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Which of the following does NOT occur during mitosis?

Correct Answer
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If there are 20 chromatids in a cell, how many centromeres are there?

Correct Answer
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The following question(s) are based on the accompanying figure. -In the figure, G1 is represented by which numbered part(s) of the cycle?

Correct Answer
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Exam 12: The Cell Cycle

Movement of the chromosomes during anaphase would be most affected by a drug that prevents ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Use the data in the accompanying table to answer the following question(s) . -Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is that ________.

Correct AnswerverifiedShow Answer

Myosin is a motor protein involved in animal cell cytokinesis. It binds to ATP or ADP, causing the myosin to move with respect to actin. What is the effect of the interaction between myosin and actin?

Correct AnswerverifiedShow Answer

Use the data in the accompanying table to answer the following question(s) . -The best conclusion concerning delta is that the cells ________.

Correct AnswerverifiedShow Answer

The following question(s) are based on the accompanying figure. -In the figure, at which of the numbered regions would you expect to find cells at metaphase?

Correct AnswerverifiedShow Answer

Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, its effectiveness must be related to ________.

Correct AnswerverifiedShow Answer

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely ________.

Correct AnswerverifiedShow Answer

Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?

Correct AnswerverifiedShow Answer

-In the accompanying figure, MPF reaches its highest concentration during this stage.

Correct AnswerverifiedShow Answer

Kinetochore microtubules assist in the process of splitting centromeres by ________.

Correct AnswerverifiedShow Answer

What happens if MPF (mitosis-promoting factor) is introduced into immature frog oocytes that are arrested in G2?

Correct AnswerverifiedShow Answer

Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have times more DNA than G1 phase cells. The cells of this group are ________.

Correct AnswerverifiedShow Answer

Which cytoskeletal proteins are important constituents of the contractile structures that form the cleavage furrows involved in animal cell cytokinesis?

Correct AnswerverifiedShow Answer

At which phase are centrioles beginning to move apart in animal cells?

Correct AnswerverifiedShow Answer

In human and many other eukaryotic species' cells, the nuclear membrane has to disappear to permit ________.

Correct AnswerverifiedShow Answer

Which of the following does NOT occur during mitosis?

Correct AnswerverifiedShow Answer

If there are 20 chromatids in a cell, how many centromeres are there?

Correct AnswerverifiedShow Answer

The following question(s) are based on the accompanying figure. -In the figure, G1 is represented by which numbered part(s) of the cycle?

Correct AnswerverifiedShow Answer

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