Question 1

The looping of DNA around histone proteins

Accepted Answer

A)   produces the characteristic helix shape of the DNA.
B)   allows the room for cellular machinery to reach all genes so they may be transcribed.
C)   condenses a large amount of DNA so that it can fit into the cell.
D)   prevents the DNA from becoming kinked and breaking.
E)   occurs when the DNA is damaged and allows the cell to be destroyed through apoptosis.F) A) and E)
G) C) and D)

Question 2

Translocations can lead to cancer if they disrupt the genes that regulate the cell cycle.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements is correct regarding the events of the cell cycle?

Accepted Answer

A)   DNA is duplicated during the G1 and G2 phases.
B)   DNA replicates during cytokinesis.
C)   The M phase is usually the longest phase.
D)   Interphase consists of G1, S, and G2.
E)   The cell stops growing in G2 phase.F) A) and E)
G) A) and D)

Question 4

Proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle, are called

Accepted Answer

A)   centromeres.
B)   kinetochores.
C)   centrioles.
D)   proton pumps.
E)   cyclins.F) A) and D)
G) A) and C)

Question 5

The figure below shows a cell in the mitotic stage of

Accepted Answer

A)   anaphase.
B)   interphase.
C)   metaphase.
D)   prophase.
E)   telophase.F) A) and E)
G) A) and D)

Question 6

Susan went to an oncologist because some cancerous cells had been detected within her breast tissue. Which of the following is not a warning signal for cancer?

Accepted Answer

A)   The cells in the breast tissue lacked differentiation.
B)   Some cells in the tissue had failed to acquire the specialized structure that the cell should have.
C)   Some cells had abnormally large nuclei.
D)   The cells had an abnormal number of chromosomes.
E)   Some cells were found to be in interphase.F) A) and C)
G) A) and B)

Question 7

The mitotic spindle is composed of ________ and grows from the ________ toward the center of the cell.

Accepted Answer

A)   microtubules; centrosome
B)   asters; spindle equator
C)   centrosomes; aster
D)   microtubules; chromatid
E)   microtubules; cleavage furrowF) All of the above
G) None of the above

Question 8

What is the structure that holds together the two sister chromatids that form a chromosome?

Accepted Answer

A)   centromere
B)   nucleosome
C)   histone
D)   nucleus
E)   chromatinF) C) and D)
G) B) and E)

Question 9

If a cell has 46 chromosomes at the beginning of mitosis, then at the end of anaphase there would be a total of

Accepted Answer

A)   23 chromatids.
B)   23 chromosomes.
C)   46 chromatids.
D)   46 chromosomes.
E)   92 chromosomes.F) A) and D)
G) None of the above

Question 10

Which of the following is not a characteristic of cancer cells?

Accepted Answer

A)   cells that have lost contact inhibition
B)   cells with abnormal nuclei
C)   cells that spend 90% of their lifetime in interphase
D)   cells that lack differentiation
E)   cells that have uncontrolled cell divisionF) A) and B)
G) A) and C)

Question 11

A protein that promotes apoptosis would be considered an)

Accepted Answer

A)   oncogene.
B)   proto-oncogene.
C)   tumor suppressor.
D)   mutant tumor suppressor.
E)   signal transduction pathway protein.F) D) and E)
G) B) and C)

Question 12

A mutation results in a cell that no longer produces a normal protein kinase for the M-phase checkpoint. Which of the following would likely be the immediate result of this mutation?

Accepted Answer

A)   The cell would prematurely enter anaphase.
B)   The cell would never leave metaphase.
C)   The cell would never enter metaphase.
D)   The cell would never enter prophase.
E)   The cell would undergo normal mitosis, but fail to enter the next G1.F) A) and C)
G) A) and E)

Question 13

A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA in the nucleus. Those cells would have ________ picograms at the end of the S phase and ________ picograms at the end of G2.

Accepted Answer

A)   8; 8
B)   8; 16
C)   16; 8
D)   16; 16
E)   12; 16F) A) and B)
G) A) and E)

Question 14

What would occur in a cell if the production of cyclins halted during the cell cycle?

Accepted Answer

A)   DNA would not be replicated in the S phase.
B)   Organelles would not be duplicated in G1.
C)   The cell would not complete cytokinesis.
D)   The cell would enter the G0 phase.
E)   The cell would remain in the G2 phase and would not enter into mitosis.F) B) and C)
G) D) and E)

Question 15

Plant cells and animal cells differ in cytokinesis because

Accepted Answer

A)   plant cells need to build a cell wall, while animal cells do not.
B)   plant cells need to build a cell wall, while animal cells built the extra cellular matrix.
C)   animal cells need to build a cell membrane, while plant cells do not.
D)   animal cells are living, while plant cells are not.
E)   plant cells divide by mitosis, while animal cells divide by meiosis.F) D) and E)
G) A) and B)

Question 16

Losing weight can reduce an obese person's risk for cancer by up to 40%.

Accepted Answer

A) True 
 B)False

Question 17

The drug chloral hydrate prevents elongation of microtubules by preventing the addition of new subunits to the growing end. During which stage of mitosis would chloral hydrate be most harmful?

Accepted Answer

A)   prophase
B)   metaphase
C)   anaphase
D)   telophase
E)   interphaseF) A) and B)
G) A) and E)

Question 18

The structure labeled "c" in the following figure is called the

Accepted Answer

A)   centromere.
B)   centriole.
C)   sister chromatid.
D)   spindle.
E)   non-sister chromatid.F) A) and B)
G) A) and C)

Exam 8: Cellular Reproduction

The drug chloral hydrate prevents elongation of microtubules by preventing the addition of new subunits to the growing end. During which stage of mitosis would chloral hydrate be most harmful?

Correct Answer
verified

What is the structure that holds together the two sister chromatids that form a chromosome?

Correct Answer
verified

Which of the following is not a characteristic of cancer cells?

Correct Answer
verified

Susan went to an oncologist because some cancerous cells had been detected within her breast tissue. Which of the following is not a warning signal for cancer?

Correct Answer
verified

The structure labeled "c" in the following figure is called the

Correct Answer
verified

A protein that promotes apoptosis would be considered an)

Correct Answer
verified

What would occur in a cell if the production of cyclins halted during the cell cycle?

Correct Answer
verified

The mitotic spindle is composed of and grows from the toward the center of the cell.

Correct Answer
verified

Which of the following statements is correct regarding the events of the cell cycle?

Correct Answer
verified

If a cell has 46 chromosomes at the beginning of mitosis, then at the end of anaphase there would be a total of

Correct Answer
verified

A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA in the nucleus. Those cells would have picograms at the end of the S phase and picograms at the end of G₂.

Correct Answer
verified

Plant cells and animal cells differ in cytokinesis because

Correct Answer
verified

Translocations can lead to cancer if they disrupt the genes that regulate the cell cycle.

Correct Answer
verified

Proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle, are called

Correct Answer
verified

The figure below shows a cell in the mitotic stage of

Correct Answer
verified

Losing weight can reduce an obese person's risk for cancer by up to 40%.

Correct Answer
verified

A mutation results in a cell that no longer produces a normal protein kinase for the M-phase checkpoint. Which of the following would likely be the immediate result of this mutation?

Correct Answer
verified

The looping of DNA around histone proteins

Correct Answer
verified

Exam 8: Cellular Reproduction

The drug chloral hydrate prevents elongation of microtubules by preventing the addition of new subunits to the growing end. During which stage of mitosis would chloral hydrate be most harmful?

Correct AnswerverifiedShow Answer

What is the structure that holds together the two sister chromatids that form a chromosome?

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of cancer cells?

Correct AnswerverifiedShow Answer

Susan went to an oncologist because some cancerous cells had been detected within her breast tissue. Which of the following is not a warning signal for cancer?

Correct AnswerverifiedShow Answer

The structure labeled "c" in the following figure is called the

Correct AnswerverifiedShow Answer

A protein that promotes apoptosis would be considered an)

Correct AnswerverifiedShow Answer

What would occur in a cell if the production of cyclins halted during the cell cycle?

Correct AnswerverifiedShow Answer

The mitotic spindle is composed of ________ and grows from the ________ toward the center of the cell.

Correct AnswerverifiedShow Answer

Which of the following statements is correct regarding the events of the cell cycle?

Correct AnswerverifiedShow Answer

If a cell has 46 chromosomes at the beginning of mitosis, then at the end of anaphase there would be a total of

Correct AnswerverifiedShow Answer

A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA in the nucleus. Those cells would have ________ picograms at the end of the S phase and ________ picograms at the end of G2.

Correct AnswerverifiedShow Answer

Plant cells and animal cells differ in cytokinesis because

Correct AnswerverifiedShow Answer

Translocations can lead to cancer if they disrupt the genes that regulate the cell cycle.

Correct AnswerverifiedShow Answer

Proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle, are called

Correct AnswerverifiedShow Answer

The figure below shows a cell in the mitotic stage of

Correct AnswerverifiedShow Answer

Losing weight can reduce an obese person's risk for cancer by up to 40%.

Correct AnswerverifiedShow Answer

A mutation results in a cell that no longer produces a normal protein kinase for the M-phase checkpoint. Which of the following would likely be the immediate result of this mutation?

Correct AnswerverifiedShow Answer

The looping of DNA around histone proteins

Correct AnswerverifiedShow Answer

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The mitotic spindle is composed of and grows from the toward the center of the cell.

Correct Answer
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verified

A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA in the nucleus. Those cells would have picograms at the end of the S phase and picograms at the end of G₂.

Correct Answer
verified

Correct Answer
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