Question 1

During this stage of mitosis, the nuclear envelope begins to break down and the spindle begins to form.

Accepted Answer

A)  Anaphase
B)  Metaphase
C)  Prophase
D)  TelophaseE) A) and C)
F) C) and D)

Question 2

The number of chromosomes in diploid eukaryotic cellsrev: 10_20_2014_QC_57039

Accepted Answer

A)  is 46.
B)  can be predicted by the size of the organism.
C)  changes as each organism grows and ages.
D)  varies considerably from 2 to over 1000 in different species.E) None of the above
F) A) and C)

Question 3

If there are 32 sister chromatids in a normal somatic cell, how many chromosomes are there?

Accepted Answer

A)  8
B)  16
C)  32
D)  64E) B) and D)
F) A) and D)

Question 4

Consider the cell cycle of a human cell.During G2, what is the state of the homologous chromosomes?

Accepted Answer

A)  The homologous chromosomes are lined up on the equator of the cell.
B)  The homologous chromosomes have all been copied through DNA replication and are beginning to condense.
C)  The homologous chromosomes have been pulled to their respective poles by the spindle apparatus.
D)  The homologous chromosomes have not been replicated yet.E) B) and C)
F) A) and D)

Question 5

What is separase?

Accepted Answer

A)  A protein that marks a protein called securin for destruction.
B)  A protein that is part of the cohesin complex.
C)  A protein that destroys cohesin through its protease activity.
D)  A protein that targets the mitotic cyclin for degradation.E) A) and D)
F) A) and C)

Question 6

If a cell has 32 chromosomes prior to S and undergoes mitosis followed by cytokinesis, each new daughter cell will have how many chromosomes?

Accepted Answer

A)  64
B)  32
C)  16
D)  8E) B) and C)
F) B) and D)

Question 7

If a chromosome contains a mutation such that it cannot bind to the kinetochore complex, what would be the consequence?

Accepted Answer

A)  That chromosome would not be able to be replicated.
B)  That chromosome would not be able to condense.
C)  That chromosome would not be able to bind to the mitotic spindle.
D)  That chromosome would not be able to interact with histone proteins.E) A) and D)
F) B) and D)

Question 8

If a cell was capable of bypassing metaphase and going directly from prometaphase to anaphase, what is the most likely consequence of this?

Accepted Answer

A)  The resulting daughter cells would not have a nuclear envelope.
B)  The resulting daughter cells would have significantly different quantities of cytoplasmic materials.
C)  The resulting daughter cells would have different numbers of chromosomes.
D)  The resulting daughter cells would be completely normal.E) A) and D)
F) B) and C)

Question 9

The drug Taxol, or Paclitaxel, is used to treat patients with a variety of cancers, including breast, lung and ovarian cancers.The drug works by stabilizing microtubules, and preventing their disassembly.The goal of the drug is to prevent dividing cells from being able to complete mitosis.As a result, cancerous cells can no longer divide.In a cell treated with Taxol, at what stage of mitosis will the cells arrest?

Accepted Answer

A)  Prior to metaphase
B)  Anaphase
C)  Telophase
D)  CytokinesisE) C) and D)
F) A) and B)

Question 10

The progress of the eukaryotic cell cycle is regulated primarily by what proteins?

Accepted Answer

A)  Cyclins
B)  Histone proteins
C)  Condensins
D)  FtsZE) A) and B)
F) All of the above

Question 11

This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes:

Accepted Answer

A)  Prometaphase
B)  Telophase
C)  Anaphase
D)  MetaphaseE) All of the above
F) A) and B)

Question 12

Plant 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) A) and B)
F) A) and C)

Question 13

Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?

Accepted Answer

A)  This is the only place in the cell where the cyclins and Cdks are located.
B)  If they cannot, it suggests that they aren't properly attached to the spindle microtubules, and thus won't separate properly during anaphase.
C)  This is the location where the chromosomes can become attached to the spindle microtubules.
D)  This allows asters to form.E) None of the above
F) A) and C)

Question 14

The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:

Accepted Answer

A)  The kinetochore
B)  The centromere
C)  The cohesin complex
D)  The centrioleE) A) and B)
F) A) and C)

Question 15

The physical distribution of cytoplasmic material into the two daughter cells in plant cells is referred to as:

Accepted Answer

A)  The gap phase
B)  Cytokinesis
C)  Binary fission
D)  InterphaseE) None of the above
F) A) and D)

Question 16

These structures are held together by cohesin:

Accepted Answer

A)  Nucleosomes
B)  Sister chromatids
C)  Homologous chromosomes
D)  SolenoidsE) A) and B)
F) B) and C)

Question 17

In later chapters, you will learn more about the regulation of gene expression.One way to regulate gene expression is to make changes to the histone proteins to alter how tightly the DNA is coiled and wrapped.The more tightly coiled and wrapped a particular region of DNA is, the less likely it is that the genes in that region will be expressed.Bearing this in mind, how tightly do you think regions of heterochromatin are compacted?

Accepted Answer

A)  Very tightly
B)  Moderately
C)  Loosely
D)  Not at allE) None of the above
F) C) and D)

Question 18

At what checkpoint(s)  does the cell arrest in response to DNA damage?

Accepted Answer

A)  G1/S
B)  G2/M
C)  spindle
D)  G1/S and G2/ME) B) and C)
F) A) and C)

Question 19

What stage of mitosis is essentially the reverse of prophase?

Accepted Answer

A)  Anaphase
B)  Prometaphase
C)  Metaphase
D)  TelophaseE) None of the above
F) B) and C)

Question 20

What is one of the roles of the APC/C during anaphase?

Accepted Answer

A)  To directly target the mitotic cyclins for destruction.
B)  To directly target cohesin for destruction.
C)  To directly target separase for destruction.
D)  To directly target microtubules for destruction.E) A) and D)
F) B) and C)

Exam 10: How Cells Divide

If a chromosome contains a mutation such that it cannot bind to the kinetochore complex, what would be the consequence?

Correct Answer
verified

If there are 32 sister chromatids in a normal somatic cell, how many chromosomes are there?

Correct Answer
verified

What is one of the roles of the APC/C during anaphase?

Correct Answer
verified

Correct Answer
verified

What stage of mitosis is essentially the reverse of prophase?

Correct Answer
verified

The physical distribution of cytoplasmic material into the two daughter cells in plant cells is referred to as:

Correct Answer
verified

The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:

Correct Answer
verified

This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes:

Correct Answer
verified

The number of chromosomes in diploid eukaryotic cellsrev: 10_20_2014_QC_57039

Correct Answer
verified

These structures are held together by cohesin:

Correct Answer
verified

Consider the cell cycle of a human cell.During G2, what is the state of the homologous chromosomes?

Correct Answer
verified

During this stage of mitosis, the nuclear envelope begins to break down and the spindle begins to form.

Correct Answer
verified

Plant cells typically achieve cytokinesis by:

Correct Answer
verified

The progress of the eukaryotic cell cycle is regulated primarily by what proteins?

Correct Answer
verified

Correct Answer
verified

If a cell was capable of bypassing metaphase and going directly from prometaphase to anaphase, what is the most likely consequence of this?

Correct Answer
verified

At what checkpoint(s) does the cell arrest in response to DNA damage?

Correct Answer
verified

What is separase?

Correct Answer
verified

If a cell has 32 chromosomes prior to S and undergoes mitosis followed by cytokinesis, each new daughter cell will have how many chromosomes?

Correct Answer
verified

Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?

Correct Answer
verified

Exam 10: How Cells Divide

If a chromosome contains a mutation such that it cannot bind to the kinetochore complex, what would be the consequence?

Correct AnswerverifiedShow Answer

If there are 32 sister chromatids in a normal somatic cell, how many chromosomes are there?

Correct AnswerverifiedShow Answer

What is one of the roles of the APC/C during anaphase?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What stage of mitosis is essentially the reverse of prophase?

Correct AnswerverifiedShow Answer

The physical distribution of cytoplasmic material into the two daughter cells in plant cells is referred to as:

Correct AnswerverifiedShow Answer

The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:

Correct AnswerverifiedShow Answer

This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes:

Correct AnswerverifiedShow Answer

The number of chromosomes in diploid eukaryotic cellsrev: 10_20_2014_QC_57039

Correct AnswerverifiedShow Answer

These structures are held together by cohesin:

Correct AnswerverifiedShow Answer

Consider the cell cycle of a human cell.During G2, what is the state of the homologous chromosomes?

Correct AnswerverifiedShow Answer

During this stage of mitosis, the nuclear envelope begins to break down and the spindle begins to form.

Correct AnswerverifiedShow Answer

Plant cells typically achieve cytokinesis by:

Correct AnswerverifiedShow Answer

The progress of the eukaryotic cell cycle is regulated primarily by what proteins?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If a cell was capable of bypassing metaphase and going directly from prometaphase to anaphase, what is the most likely consequence of this?

Correct AnswerverifiedShow Answer

At what checkpoint(s) does the cell arrest in response to DNA damage?

Correct AnswerverifiedShow Answer

What is separase?

Correct AnswerverifiedShow Answer

If a cell has 32 chromosomes prior to S and undergoes mitosis followed by cytokinesis, each new daughter cell will have how many chromosomes?

Correct AnswerverifiedShow Answer

Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?

Correct AnswerverifiedShow Answer

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