Question 1

A mutated form of normal cell proteins that stimulate cancer cells to divide frequently is known as a(n) _______.

Accepted Answer

The answer of A mutated form of normal cell proteins...

Question 2

A set of cells in the intestinal epithelium divide continually to replace dead cells lost from the surface of the intestinal lining. If you examined this continually dividing population of intestinal epithelial cells under the microscope, most of the cells would

Accepted Answer

A)  be in meiosis. 
B)  be in mitosis. 
C)  be in interphase. 
D)  have condensed chromatin. 
E)  Both b and d 
A)  be in meiosis. 
B)  be in mitosis. 
C)  be in interphase. 
D)  have condensed chromatin. 
E)  Both b and d

Question 3

The major drawback of asexual reproduction is that it

Accepted Answer

A)  takes a great deal of time. 
B)  generates variation. 
C)  prevents change. 
D)  requires cytokinesis. 
E)  produces less variation among offspring than does sexual reproduction. 
A)  takes a great deal of time. 
B)  generates variation. 
C)  prevents change. 
D)  requires cytokinesis. 
E)  produces less variation among offspring than does sexual reproduction.

Question 4

During meiosis, the sister chromatids separate during

Accepted Answer

A)  anaphase II. 
B)  anaphase I. 
C)  the S phase. 
D)  synapsis. 
E)  telophase II. 
A)  anaphase II. 
B)  anaphase I. 
C)  the S phase. 
D)  synapsis. 
E)  telophase II.

Question 5

How does a nucleus in G2 differ from a nucleus in G1?

Accepted Answer

A)  The G2 nucleus has double the amount of DNA as the G1 nucleus. 
B)  DNA synthesis occurs only in the G1 phase. 
C)  Inactive cells are arrested only in the G2 phase. 
D)  During G2, the cell prepares for S phase. 
E)  All of the above 
A)  The G2 nucleus has double the amount of DNA as the G1 nucleus. 
B)  DNA synthesis occurs only in the G1 phase. 
C)  Inactive cells are arrested only in the G2 phase. 
D)  During G2, the cell prepares for S phase. 
E)  All of the above

Question 6

After the centromeres separate during mitosis, the chromatids, now called _______, move toward opposite poles of the spindle.

Accepted Answer

A)  centrosomes 
B)  kinetochores 
C)  half-spindles 
D)  asters 
E)  daughter chromosomes 
A)  centrosomes 
B)  kinetochores 
C)  half-spindles 
D)  asters 
E)  daughter chromosomes

Question 7

DNA replication occurs

Accepted Answer

A)  during both mitosis and meiosis. 
B)  only during mitosis. 
C)  only during meiosis. 
D)  during the S phase. 
E)  during G2. 
A)  during both mitosis and meiosis. 
B)  only during mitosis. 
C)  only during meiosis. 
D)  during the S phase. 
E)  during G2.

Question 8

During a process known as _______, a piece of one chromosome breaks off and becomes joined to a different chromosome.

Accepted Answer

The answer of During a process known as _______, a...

Question 9

All zygotes are

Accepted Answer

A)  multicellular. 
B)  diploid. 
C)  animals. 
D)  clones. 
E)  gametes. 
A)  multicellular. 
B)  diploid. 
C)  animals. 
D)  clones. 
E)  gametes.

Question 10

The process of programmed cell death is called

Accepted Answer

A)  necrosis. 
B)  lysis. 
C)  apoptosis. 
D)  cell displacement. 
E)  cellular suicide. 
A)  necrosis. 
B)  lysis. 
C)  apoptosis. 
D)  cell displacement. 
E)  cellular suicide.

Question 11

During mitotic anaphase, chromosomes migrate

Accepted Answer

A)  from the poles of the cell toward the equatorial plate. 
B)  from the equatorial plate toward the poles. 
C)  toward the nuclear envelope. 
D)  along with their sister chromatids toward one pole. 
E)  along with the other member of the homologous pair toward the equatorial plate. 
A)  from the poles of the cell toward the equatorial plate. 
B)  from the equatorial plate toward the poles. 
C)  toward the nuclear envelope. 
D)  along with their sister chromatids toward one pole. 
E)  along with the other member of the homologous pair toward the equatorial plate.

Question 12

Which of the following statements about sister chromatids is false?

Accepted Answer

A)  They arise by replication during S phase. 
B)  They separate from each other during each mitotic anaphase. 
C)  They usually contain identical versions of the same genetic information. 
D)  They separate from each other during meiosis I. 
E)  They are joined during prophase I and metaphase I at their common centromere. 
A)  They arise by replication during S phase. 
B)  They separate from each other during each mitotic anaphase. 
C)  They usually contain identical versions of the same genetic information. 
D)  They separate from each other during meiosis I. 
E)  They are joined during prophase I and metaphase I at their common centromere.

Question 13

Polyploidy

Accepted Answer

A)  is common in fungi. 
B)  is common in higher plants. 
C)  can result in crop plants that have larger fruit than diploid plants. 
D)  can result in sterility. 
E)  All of the above 
A)  is common in fungi. 
B)  is common in higher plants. 
C)  can result in crop plants that have larger fruit than diploid plants. 
D)  can result in sterility. 
E)  All of the above

Question 14

Chiasmata

Accepted Answer

A)  are sites where nonsister chromatids can exchange genetic material during meiosis. 
B)  are sites where sister chromatids can exchange genetic material during meiosis. 
C)  increase genetic variation among the products of meiosis. 
D)  increase genetic variation among the products of mitosis. 
E)  Both a and c 
A)  are sites where nonsister chromatids can exchange genetic material during meiosis. 
B)  are sites where sister chromatids can exchange genetic material during meiosis. 
C)  increase genetic variation among the products of meiosis. 
D)  increase genetic variation among the products of mitosis. 
E)  Both a and c

Question 15

The mitotic spindle

Accepted Answer

A)  is composed of intermediate filaments. 
B)  begins to form during metaphase. 
C)  is composed of two different types of microtubules. 
D)  provides the force needed for chromosome movement. 
E)  plays a role in cytokinesis. 
A)  is composed of intermediate filaments. 
B)  begins to form during metaphase. 
C)  is composed of two different types of microtubules. 
D)  provides the force needed for chromosome movement. 
E)  plays a role in cytokinesis.

Question 16

Which of the following statements about kinetochores on mitotic chromosomes is true?

Accepted Answer

A)  They are located at the centromere of each chromosome. 
B)  They are the sites where microtubules attach to separate the chromosomes. 
C)  They are organized so that there is one per sister chromatid. 
D)  Kinetochore microtubules from opposite poles attach to each sister chromatid. 
E)  All of the above 
A)  They are located at the centromere of each chromosome. 
B)  They are the sites where microtubules attach to separate the chromosomes. 
C)  They are organized so that there is one per sister chromatid. 
D)  Kinetochore microtubules from opposite poles attach to each sister chromatid. 
E)  All of the above

Exam 11: The Cell Cycle and Cell Division

A mutated form of normal cell proteins that stimulate cancer cells to divide frequently is known as a(n) _______.

A set of cells in the intestinal epithelium divide continually to replace dead cells lost from the surface of the intestinal lining. If you examined this continually dividing population of intestinal epithelial cells under the microscope, most of the cells would

The major drawback of asexual reproduction is that it

During meiosis, the sister chromatids separate during

How does a nucleus in G2 differ from a nucleus in G1?

After the centromeres separate during mitosis, the chromatids, now called _______, move toward opposite poles of the spindle.

DNA replication occurs

During a process known as _______, a piece of one chromosome breaks off and becomes joined to a different chromosome.

All zygotes are

The process of programmed cell death is called

During mitotic anaphase, chromosomes migrate

Which of the following statements about sister chromatids is false?

Polyploidy

Chiasmata

The mitotic spindle

Which of the following statements about kinetochores on mitotic chromosomes is true?

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