Question 1

Differentiate between necrosis and apoptosis.

Accepted Answer

Necrosis occurs when a cell is damaged b...

Question 2

If a cell in G2 has 1.6 pg of DNA, it had _______ of DNA in G1.

Accepted Answer

A)   0.4 pg
B)   0.8 pg
C)   1.6 pg
D)   3.2 pg
E)   1.6 pg if it is a plant cell and 3.2 pg if it is an animal cellF) A) and B)
G) All of the above

Question 3

Which example is not a use of apoptosis in the regular functioning of an organism?

Accepted Answer

A)   Plants' hypersensitive response to wall off infectious agents
B)   Removal of excess tissue during development
C)   Replacement of cells subject to regular damage
D)   Destruction of cells with DNA errors
E)   All of the above are routine applications of apoptosis.F) A) and E)
G) A) and D)

Question 4

Chromosomes contain large amounts of interacting proteins known as

Accepted Answer

A)   pentanes.
B)   centrosomes.
C)   histones.
D)   protein hormones.
E)   cyclins.F) C) and E)
G) B) and D)

Question 5

Cancer-fighting drugs are usually given in combination to target several different stages of the cell cycle.Which statement best explains why this might be a better approach than use of a single drug?

Accepted Answer

A)   Cancers often have multiple mutations in different cells of the tumor, and some of these mutations might affect different parts of the cell cycle.
B)   A single drug approach might not pick the correct drug on the first try, so trying many at once saves time.
C)   Cancer-fighting drugs are not very potent, so many are needed at the same time.
D)   Cancer cells constantly change, and multiple drugs can overcome those changes.
E)   None of the above; this is not a better approach and is not well thought out.F) C) and D)
G) D) and E)

Question 6

Mature nerve cells, which are incapable of cell division, are most likely in

Accepted Answer

A)   G1.
B)   the S phase.
C)   G2.
D)   mitosis.
E)   meiosis.F) A) and E)
G) B) and D)

Question 7

A patient who was treated for skin cancer was considered in remission but now has tumors in other organs.This is due to _______ of the original cancer.

Accepted Answer

The answer of A patient who was treated for skin...

Question 8

The products of mitosis are

Accepted Answer

A)   one nucleus containing twice as much DNA as the parent nucleus.
B)   two genetically identical cells.
C)   four nuclei containing half as much DNA as the parent nucleus.
D)   four genetically identical nuclei.
E)   two genetically identical nuclei.F) A) and D)
G) B) and C)

Question 9

In which stage of meiosis would chiasmata be visible?

Accepted Answer

A)   Late prophase of meiosis I
B)   Interphase preceding meiosis II
C)   Telophase I
D)   Anaphase II
E)   Interphase preceding meiosis IF) B) and C)
G) A) and C)

Question 10

A cell in G1 contains 18 chromosomes.That same cell in G2 would have

Accepted Answer

A)   9 chromosomes.
B)   36 chromosomes.
C)   9 sister chromatids.
D)   18 sister chromatids.
E)   36 sister chromatids.F) B) and C)
G) None of the above

Question 11

Programmed cell death (apoptosis)

Accepted Answer

A)   occurs in cells that have been deprived of essential nutrients.
B)   occurs only in cells that have damaged DNA.
C)   is a natural process during development.
D)   is signaled by the initiation of mitosis.
E)   is well controlled in cancer cells.F) C) and D)
G) B) and E)

Question 12

Which statement about homologous chromosome pairs is false?

Accepted Answer

A)   They come from only one of the individual's parents.
B)   They usually contain slightly different versions of the same genetic information.
C)   They separate from each other during meiosis I.
D)   They synapse during meiosis I.
E)   All of the above are true; none is false.F) B) and C)
G) A) and B)

Question 13

If an egg of a species has 32 chromosomes, then a zygote would have _______ chromosomes.

Accepted Answer

The answer of If an egg of a species has...

Question 14

The members of a homologous pair of chromosomes

Accepted Answer

A)   are identical in size and appearance.
B)   contain identical genetic information.
C)   separate to opposite poles of the cell during mitosis.
D)   are found only in haploid cells.
E)   are present only after the S phase.F) A) and B)
G) B) and E)

Question 15

A mutation causes difficulty in the separation of sister chromatids during mitosis.Based on what you have read, the most likely cause of this phenomenon is that

Accepted Answer

A)   the histones are too positively charged.
B)   the histones are not sufficiently positively charged.
C)   cyclin levels are inappropriate.
D)   there is a defect in the spindle apparatus.
E)   there is a defect in the cell wall.F) A) and D)
G) B) and C)

Question 16

In order to divide, cells must be stimulated by external chemical signals called _______.

Accepted Answer

The answer of In order to divide, cells must be...

Question 17

To produce larger seeds, researchers cross two varieties of a grain.These researchers are attempting to cause

Accepted Answer

A)   aneuploidy.
B)   autopolyploidy.
C)   allopolyploidy.
D)   apoptosis.
E)   translocation.F) B) and D)
G) C) and D)

Question 18

When you cut yourself, the wound will most likely release

Accepted Answer

A)   interferon.
B)   cyclins.
C)   Cdk's.
D)   erythropoietin.
E)   platelet-derived growth factor.F) A) and B)
G) C) and D)

Question 19

Asexual reproduction produces genetically identical individuals because

Accepted Answer

A)   chromosomes do not have to replicate during asexual reproduction.
B)   it involves chromosome replication without cytokinesis.
C)   no meiosis or fertilization take place.
D)   cell division occurs only in meiosis.
E)   the mitotic spindle prevents nondisjunction.F) C) and E)
G) B) and E)

Question 20

Describe how a cell exposed to radiation for a prolonged period of time might trigger and proceed with apoptosis.

Accepted Answer

A cell that has been damaged by radiatio...

Exam 11: The Cell Cycle and Cell Division

If a cell in G2 has 1.6 pg of DNA, it had _______ of DNA in G1.

Correct AnswerverifiedShow Answer

A mutation causes difficulty in the separation of sister chromatids during mitosis.Based on what you have read, the most likely cause of this phenomenon is that

Correct AnswerverifiedShow Answer

When you cut yourself, the wound will most likely release

Correct AnswerverifiedShow Answer

The products of mitosis are

Correct AnswerverifiedShow Answer

To produce larger seeds, researchers cross two varieties of a grain.These researchers are attempting to cause

Correct AnswerverifiedShow Answer

A patient who was treated for skin cancer was considered in remission but now has tumors in other organs.This is due to _______ of the original cancer.

Correct AnswerverifiedShow Answer

Chromosomes contain large amounts of interacting proteins known as

Correct AnswerverifiedShow Answer

Describe how a cell exposed to radiation for a prolonged period of time might trigger and proceed with apoptosis.

Correct AnswerverifiedA cell that has been damaged by radiatio...View AnswerShow Answer

Which example is not a use of apoptosis in the regular functioning of an organism?

Correct AnswerverifiedShow Answer

Cancer-fighting drugs are usually given in combination to target several different stages of the cell cycle.Which statement best explains why this might be a better approach than use of a single drug?

Correct AnswerverifiedShow Answer

In which stage of meiosis would chiasmata be visible?

Correct AnswerverifiedShow Answer

The members of a homologous pair of chromosomes

Correct AnswerverifiedShow Answer

A cell in G1 contains 18 chromosomes.That same cell in G2 would have

Correct AnswerverifiedShow Answer

In order to divide, cells must be stimulated by external chemical signals called _______.

Correct AnswerverifiedShow Answer

Which statement about homologous chromosome pairs is false?

Correct AnswerverifiedShow Answer

Mature nerve cells, which are incapable of cell division, are most likely in

Correct AnswerverifiedShow Answer

Differentiate between necrosis and apoptosis.

Correct AnswerverifiedNecrosis occurs when a cell is damaged b...View AnswerShow Answer

If an egg of a species has 32 chromosomes, then a zygote would have _______ chromosomes.

Correct AnswerverifiedShow Answer

Asexual reproduction produces genetically identical individuals because

Correct AnswerverifiedShow Answer

Programmed cell death (apoptosis)

Correct AnswerverifiedShow Answer

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A cell that has been damaged by radiatio...
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Necrosis occurs when a cell is damaged b...
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