Question 1

The function of mitosis is

Accepted Answer

A)  growth of the organism and tissue repair.
B)  to ensure that each new cell receives a complete set of genetic information.
C)  asexual reproduction in some species.
D)  All of the choices are correct.E) B) and C)
F) A) and D)

Question 2

Name the labeled structures in the figure and answer the following questions.  A.________
B.________
C.________
D.When the structures labeled "A" separate,what are they called?
E.What is the function of the structure labeled "C"?

Accepted Answer

A.Sister chromatids B.Centrome...

Question 3

In some organisms,mitosis occurs without cytokinesis.This results in

Accepted Answer

A)  cell death.
B)  a multinucleated cell.
C)  cells arrested in the G0 phase.
D)  cells with no nucleus.
E)  uncontrolled cell division.F) None of the above
G) A) and D)

Question 4

Cancer cells require many nutrients which are supplied by blood vessels.The growth of new blood vessels into cancerous tissue is called

Accepted Answer

A)  angiogenesis.
B)  metastasis.
C)  carcinogenesis.
D)  apoptosis.E) A) and B)
F) B) and C)

Question 5

In the bone marrow,stem cells produce erythrocytes which lose their nucleus and function for a few months in the bloodstream before they die.Erythrocytes never divide.Based on this information,erythrocytes

Accepted Answer

A)  leave the cell cycle in a G0 phase,after exiting G1.
B)  leave the cell cycle in a G3 phase,which immediately follows G2.
C)  halt in the midst of the S phase.
D)  continually cycle but simply fail to go through cytokinesis.
E)  reverse from G2 to G1.F) B) and C)
G) A) and E)

Question 6

Viruses and chemical exposure can cause mutations in proto-oncogenes which can lead to cancer.

Accepted Answer

A) True 
 B)False

Question 7

How does euchromatin differ from heterochromatin? Select all that apply.

Accepted Answer

A)  Euchromatin represents the active chromatin containing genes that are being transcribed.
B)  Heterochromatin is more compacted than euchromatin.
C)  Euchromatin is more representative of the chromosomes during mitosis.
D)  Most chromosomes contain both regions of euchromatin and heterochromatin.E) A) and D)
F) B) and C)

Question 8

The diploid (2n) number of chromosomes for a human being is

Accepted Answer

A)  23.
B)  24.
C)  44.
D)  46.
E)  48.F) A) and E)
G) C) and E)

Question 9

Which of the following are necessary for a cell to pass the G1 checkpoint?

Accepted Answer

A)  Growth signals must be present.
B)  Sufficient nutrients must be available.
C)  The DNA must be undamaged.
D)  All of these.
E)  None of these.F) C) and E)
G) None of the above

Question 10

Angiogenesis

Accepted Answer

A)  is the growth of blood vessels into the tumor.
B)  is directed by additional mutations in tumor cells.
C)  brings nutrients and oxygen to a tumor.
D)  All of these.
E)  None of these.F) A) and E)
G) D) and E)

Question 11

If a parent cell has 48 chromosomes,how many chromosomes will each daughter cell have after mitosis and cytokinesis occurs?

Accepted Answer

A)  24 chromosomes
B)  48 chromosomes
C)  12 chromosomes
D)  96 chromosomesE) A) and B)
F) A) and C)

Question 12

What might prevent a cell from passing the G1 checkpoint?

Accepted Answer

A)  The DNA has not completed replication.
B)  The cell may need to enter the G0 stage.
C)  The cell may have damaged DNA and need to undergo apoptosis.
D)  Only A and B are correct.
E)  Only B and C are correct.F) D) and E)
G) B) and D)

Question 13

A human cell contains at least 2 m of DNA,yet all of this DNA is packed into a nucleus that is about 6 μm in diameter.How is this accomplished? Select all that apply.

Accepted Answer

A)  DNA is wrapped around histone proteins giving it the appearance of a string of beads.
B)  DNA is folded into a zigzag structure.
C)  The DNA is coiled into radial loops.
D)  The DNA is cut at several locations and each section is loosely wrapped into a bead-like shape.E) A) and C)
F) B) and C)

Question 14

Which is NOT correctly associated with cancer?

Accepted Answer

A)  Angiogenesis forms new blood vessels and brings nutrients and oxygen to the tumor.
B)  The cells are organized in a single layer.
C)  Metastasis establishes new tumors distant from the site of the primary tumor.
D)  Cells may have abnormally large nuclei.E) A) and B)
F) A) and D)

Question 15

Use the following line to complete the next group of questions.

The enzymes that bring about apoptosis:
-are ordinarily held in check by inhibitors.

Accepted Answer

A) True 
 B)False

Question 16

Which statement below lists the correct steps for binary fission?

Accepted Answer

A)  1) attachment of chromosome to the plasma membrane,2.enlargement of cell volume,3.DNA replication occurs,4.cell elongates and chromosomes are pulled apart,5.a new cell wall and plasma membrane divide the cell in half
B)  1) attachment of chromosome to the plasma membrane,2.enlargement of cell volume,3.DNA replication occurs,4.a new cell wall and plasma membrane divide the cell in half,5.cell elongates and chromosomes are pulled apart
C)  1) a new cell wall and plasma membrane divide the cell in half,2.attachment of chromosome to the plasma membrane,3.enlargement of cell volume,4.DNA replication occurs,5.cell elongates and chromosomes are pulled apart
D)  1) enlargement of cell volume,2.attachment of chromosome to the plasma membrane,3.DNA replication occurs,4.cell elongates and chromosomes are pulled apart,5.a new cell wall and plasma membrane divide the cell in halfE) A) and B)
F) A) and C)

Question 17

Which of the following statements applies to mitosis but not to cytokinesis?

Accepted Answer

A)  It contains a checkpoint that will evaluate the quality of the cell.
B)  It requires a large amount of ATP in order for the cellular mechanisms to function.
C)  If it is disrupted,it can lead to an abnormal cell.
D)  It results in two daughter cells that are half the size of the original cell.E) A) and C)
F) C) and D)

Question 18

Which of the following descriptions of malignant and benign tumors are true? Select all that apply.

Accepted Answer

A)  Both benign and malignant tumors are forms of abnormal cell growth
B)  Benign tumors tend to grow very large while malignant tumors stay small.
C)  Malignant tumors have more genetic mutations than benign tumors .
D)  benign tumors can metastasize while malignant tumors tend to stay in one location.
E)  malignant tumors have more genetic mutations than benign tumors.F) A) and B)
G) A) and C)

Question 19

Which represents the correct sequence of stages in the cell cycle?

Accepted Answer

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

Question 20

The haploid (n) number of chromosomes for a human being is

Accepted Answer

A)  23.
B)  24.
C)  44.
D)  46.
E)  48.F) D) and E)
G) C) and D)

Exam 9: The Cell Cycle and Cellular Reproduction

Viruses and chemical exposure can cause mutations in proto-oncogenes which can lead to cancer.

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The function of mitosis is

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A human cell contains at least 2 m of DNA,yet all of this DNA is packed into a nucleus that is about 6 μm in diameter.How is this accomplished? Select all that apply.

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How does euchromatin differ from heterochromatin? Select all that apply.

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In some organisms,mitosis occurs without cytokinesis.This results in

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Cancer cells require many nutrients which are supplied by blood vessels.The growth of new blood vessels into cancerous tissue is called

Correct AnswerverifiedShow Answer

What might prevent a cell from passing the G1 checkpoint?

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Which of the following are necessary for a cell to pass the G1 checkpoint?

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Angiogenesis

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Which is NOT correctly associated with cancer?

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Which represents the correct sequence of stages in the cell cycle?

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Which statement below lists the correct steps for binary fission?

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Name the labeled structures in the figure and answer the following questions. A.________ B.________ C.________ D.When the structures labeled "A" separate,what are they called? E.What is the function of the structure labeled "C"?

Correct AnswerverifiedA.Sister chromatids B.Centrome...View AnswerShow Answer

In the bone marrow,stem cells produce erythrocytes which lose their nucleus and function for a few months in the bloodstream before they die.Erythrocytes never divide.Based on this information,erythrocytes

Correct AnswerverifiedShow Answer

The haploid (n) number of chromosomes for a human being is

Correct AnswerverifiedShow Answer

Use the following line to complete the next group of questions. The enzymes that bring about apoptosis: -are ordinarily held in check by inhibitors.

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Which of the following statements applies to mitosis but not to cytokinesis?

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The diploid (2n) number of chromosomes for a human being is

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Which of the following descriptions of malignant and benign tumors are true? Select all that apply.

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If a parent cell has 48 chromosomes,how many chromosomes will each daughter cell have after mitosis and cytokinesis occurs?

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What might prevent a cell from passing the G₁ checkpoint?

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Which of the following are necessary for a cell to pass the G₁ checkpoint?

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Name the labeled structures in the figure and answer the following questions. A. B. C. D.When the structures labeled "A" separate,what are they called? E.What is the function of the structure labeled "C"?

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A.Sister chromatids B.Centrome...
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