Question 1

Which of the following sequence of cell-cycle phases is characteristic of eukaryotes?

Accepted Answer

A)  G to S to M
B)  G1 to S to G2 to M to C
C)  S to M to C
D)  G1 to G2 to S to C
E)  G1 to G2 to G3 to S to CF) A) and B)
G) A) and E)

Question 2

The attachment of which molecules is critical for the proper separation of sister chromatids?

Accepted Answer

A)  chromosomes
B)  asters
C)  microtubules
D)  cyclins
E)  protein kinasesF) C) and D)
G) A) and E)

Question 3

The progress of mitosis is regulated by ______ and their dependent kinases.

Accepted Answer

A)  hormones
B)  chromosomes
C)  cyclins
D)  paracrine signalingE) B) and C)
F) None of the above

Question 4

The actual process of cell division in eukaryotic cells is called

Accepted Answer

A)  meiosis.
B)  mitosis.
C)  binary fission.
D)  cytokinesis.E) None of the above
F) B) and C)

Question 5

You are studying cell cycle progression in yeast cells.If you could prevent cdc2 from associating with mitotic cyclin,the cells would

Accepted Answer

A)  arrest in G1.
B)  arrest in G2.
C)  arrest in M.
D)  arrest in S.E) B) and C)
F) A) and D)

Question 6

All of the following phases occur during interphase of the cell cycle except

Accepted Answer

A)  G1.
B)  S.
C)  G2.
D)  M.E) B) and C)
F) A) and D)

Question 7

In the human,the body cells (non-sex cells) contain two sets of chromosomes totaling

Accepted Answer

A)  2.
B)  22.
C)  44.
D)  46.
E)  23.F) B) and E)
G) None of the above

Question 8

The proteins that participate in the functioning of the checkpoints for cell cycle control are

Accepted Answer

A)  microtubules.
B)  asters.
C)  histones.
D)  cyclins and cyclin-dependent kinases.
E)  channel proteins.F) A) and D)
G) A) and C)

Question 9

You are leading a team of researchers at a pharmaceutical company.Your goal is to design drugs that help fight cancer.Specifically,you want to focus on drugs that bind to and inactivate certain proteins,thereby halting cell cycle progression.One of your team members suggests targeting the retinoblastoma (Rb) protein.Will this approach be successful? Why or why not?

Accepted Answer

A)  This approach will not be successful.Rb is tumor-suppressor protein,and functions to inhibit the action of a number of cell cycle regulatory proteins.A drug designed to inactivate the Rb protein would essentially create the same situation as in as a cell that lacks both copies of the Rb gene.Lack of Rb activity would release the inhibition of cell cycle regulatory proteins,thereby promoting cell cycle progression,rather than halting it.
B)  This approach will be successful.Rb is tumor-suppressor protein,and functions to inhibit the action of a number of cell cycle regulatory proteins.A drug designed to activate the Rb protein would halt the cell cycle.
C)  This approach will be successful.Rb is tumor-suppressor protein,and functions to inhibit the action of a number of cell cycle regulatory proteins.A drug designed to inactivate the Rb protein would activate a cell cycle inhibition.Lack of Rb activity would therfore inhibit the cell cycle regulatory proteins.D) A) and B)
E) A) and C)

Question 10

In prophase,ribosomal RNA synthesis stops when the chromosomes condense,and this makes the

Accepted Answer

A)  chromosomes lengthen.
B)  nuclear envelope reform.
C)  nucleolus disappear.
D)  chromosomes line up at the equator.E) B) and C)
F) A) and D)

Question 11

If the centrioles are mispositioned in the cell,a functional mitotic spindle will fail to form.In this situation,how will chromosome segregation be affected?

Accepted Answer

A)  Microtubules will not attach to the kinetochores.
B)  The sister chromatids will be pulled apart and equally divided among daughter cells.
C)  All of the chromosomes will go to one of the daughter cells.
D)  Sister chromatids will not be divided equally among daughter cells.E) A) and D)
F) All of the above

Question 12

You are examining the effect of maturation-promoting factor (MPF) in sea urchin cells,which have a diploid number of 36.If you fuse a dividing sea urchin cell with a G1 arrested oocyte,what would be the outcome?

Accepted Answer

A)  The G1 cell would undergo mitosis and its daughter cells would each have 18 chromosomes.
B)  The G1 cell would undergo mitosis and its daughter cells would each have 36 chromosomes.
C)  The G1 cell would fail to undergo mitosis because it has not yet gone through S phase.
D)  The G1 cell would first go through S phase and then mitosis.Its daughter cells would have 36 chromosomes.E) B) and C)
F) A) and C)

Question 13

Chromosomes are readily visible under the microscope.

Accepted Answer

A)  G1
B)  S
C)  G2
D)  M
E)  CF) A) and B)
G) C) and D)

Question 14

You are assembling a model of a chromosome,but begin having some trouble when you get to the solenoids.If you are unable to resolve this problem,which of the following steps of chromosome structure would you be unable to achieve?

Accepted Answer

A)  DNA double helix
B)  nucleosome
C)  chromatin loop
D)  histone/DNA complexE) A) and C)
F) A) and B)

Question 15

If a eukaryotic cell has a single set of chromosomes,it is called

Accepted Answer

A)  haploid.
B)  diploid.
C)  polypoid.D) B) and C)
E) All of the above

Question 16

Animal cells typically achieve cytokinesis by

Accepted Answer

A)  binary fission.
B)  forming a cell plate across the middle of the cell.
C)  forming a cleavage furrow that pinches the cell into two.
D)  chromosome condensation.
E)  chromosome elongation.F) A) and B)
G) A) and C)

Question 17

Which of the following statements best fits as an analogy for a cell with a mutation in a tumor-suppressor gene?

Accepted Answer

A)  The gas pedal of a car gets stuck while pushed down.
B)  The gas pedal of a car does not work at all.
C)  The brake pedal of a car gets stuck while pushed down.
D)  The brake pedal of a car does not work at all.E) C) and D)
F) None of the above

Question 18

Eukaryotic chromosomes are coated with proteins containing a high proportion of basic amino acids.These proteins are given the name

Accepted Answer

A)  albumins.
B)  antibodies.
C)  enzymes.
D)  histamines.
E)  histones.F) A) and E)
G) B) and E)

Question 19

The stage of mitosis characterized by the physical separation of sister chromatids is called __________.

Accepted Answer

A)  anaphase
B)  metaphase
C)  interphase
D)  telophaseE) B) and C)
F) All of the above

Question 20

The first stage of mitosis,when the chromosomes become visibly shorter and thicker is

Accepted Answer

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

Exam 10: How Cells Divide

If a eukaryotic cell has a single set of chromosomes,it is called

Correct Answer
verified

The proteins that participate in the functioning of the checkpoints for cell cycle control are

Correct Answer
verified

The stage of mitosis characterized by the physical separation of sister chromatids is called __________.

Correct Answer
verified

Eukaryotic chromosomes are coated with proteins containing a high proportion of basic amino acids.These proteins are given the name

Correct Answer
verified

The first stage of mitosis,when the chromosomes become visibly shorter and thicker is

Correct Answer
verified

You are examining the effect of maturation-promoting factor (MPF) in sea urchin cells,which have a diploid number of 36.If you fuse a dividing sea urchin cell with a G₁ arrested oocyte,what would be the outcome?

Correct Answer
verified

If the centrioles are mispositioned in the cell,a functional mitotic spindle will fail to form.In this situation,how will chromosome segregation be affected?

Correct Answer
verified

Which of the following sequence of cell-cycle phases is characteristic of eukaryotes?

Correct Answer
verified

You are studying cell cycle progression in yeast cells.If you could prevent cdc2 from associating with mitotic cyclin,the cells would

Correct Answer
verified

The actual process of cell division in eukaryotic cells is called

Correct Answer
verified

The progress of mitosis is regulated by ______ and their dependent kinases.

Correct Answer
verified

In prophase,ribosomal RNA synthesis stops when the chromosomes condense,and this makes the

Correct Answer
verified

Animal cells typically achieve cytokinesis by

Correct Answer
verified

All of the following phases occur during interphase of the cell cycle except

Correct Answer
verified

Which of the following statements best fits as an analogy for a cell with a mutation in a tumor-suppressor gene?

Correct Answer
verified

In the human,the body cells (non-sex cells) contain two sets of chromosomes totaling

Correct Answer
verified

Correct Answer
verified

The attachment of which molecules is critical for the proper separation of sister chromatids?

Correct Answer
verified

Chromosomes are readily visible under the microscope.

Correct Answer
verified

You are assembling a model of a chromosome,but begin having some trouble when you get to the solenoids.If you are unable to resolve this problem,which of the following steps of chromosome structure would you be unable to achieve?

Correct Answer
verified

Exam 10: How Cells Divide

If a eukaryotic cell has a single set of chromosomes,it is called

Correct AnswerverifiedShow Answer

The proteins that participate in the functioning of the checkpoints for cell cycle control are

Correct AnswerverifiedShow Answer

The stage of mitosis characterized by the physical separation of sister chromatids is called __________.

Correct AnswerverifiedShow Answer

Eukaryotic chromosomes are coated with proteins containing a high proportion of basic amino acids.These proteins are given the name

Correct AnswerverifiedShow Answer

The first stage of mitosis,when the chromosomes become visibly shorter and thicker is

Correct AnswerverifiedShow Answer

You are examining the effect of maturation-promoting factor (MPF) in sea urchin cells,which have a diploid number of 36.If you fuse a dividing sea urchin cell with a G1 arrested oocyte,what would be the outcome?

Correct AnswerverifiedShow Answer

If the centrioles are mispositioned in the cell,a functional mitotic spindle will fail to form.In this situation,how will chromosome segregation be affected?

Correct AnswerverifiedShow Answer

Which of the following sequence of cell-cycle phases is characteristic of eukaryotes?

Correct AnswerverifiedShow Answer

You are studying cell cycle progression in yeast cells.If you could prevent cdc2 from associating with mitotic cyclin,the cells would

Correct AnswerverifiedShow Answer

The actual process of cell division in eukaryotic cells is called

Correct AnswerverifiedShow Answer

The progress of mitosis is regulated by ______ and their dependent kinases.

Correct AnswerverifiedShow Answer

In prophase,ribosomal RNA synthesis stops when the chromosomes condense,and this makes the

Correct AnswerverifiedShow Answer

Animal cells typically achieve cytokinesis by

Correct AnswerverifiedShow Answer

All of the following phases occur during interphase of the cell cycle except

Correct AnswerverifiedShow Answer

Which of the following statements best fits as an analogy for a cell with a mutation in a tumor-suppressor gene?

Correct AnswerverifiedShow Answer

In the human,the body cells (non-sex cells) contain two sets of chromosomes totaling

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The attachment of which molecules is critical for the proper separation of sister chromatids?

Correct AnswerverifiedShow Answer

Chromosomes are readily visible under the microscope.

Correct AnswerverifiedShow Answer

You are assembling a model of a chromosome,but begin having some trouble when you get to the solenoids.If you are unable to resolve this problem,which of the following steps of chromosome structure would you be unable to achieve?

Correct AnswerverifiedShow Answer

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You are examining the effect of maturation-promoting factor (MPF) in sea urchin cells,which have a diploid number of 36.If you fuse a dividing sea urchin cell with a G₁ arrested oocyte,what would be the outcome?

Correct Answer
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