Question 1

Contact inhibition stops normal cells from dividing when they come in contact with neighboring cells,but this is not functional in cancer cells.

Accepted Answer

A) True 
 B)False

Question 2

Cytokinesis in plant cells differs from this process in animal cells because

Accepted Answer

A)  the plant endoplasmic reticulum forms a cell plate.
B)  microtubules are laid down in a plywood-like cell plate pattern.
C)  the Golgi apparatus produces vesicles that migrate along microtubules and fuse to become a cell plate.
D)  the inner plasma membrane divides by cytokinesis as in animal cells and then secretes a cellulose cell wall.
E)  asters coalesce to form a fibrous plate that reinforces with cellulose.F) A) and E)
G) None of the above C

Question 3

Generally,complex organisms do require more genes to control their synthesis and organization than do primitive organisms.However,the numbers of chromosomes vary from ants with 2,molds with 8-14,humans with 46,potatoes with 100 and the crayfish with 200! Some birds and insects have chromosomes that dwindle in size into obscurity,so it is not possible to establish a diploid number.How do you explain this situation?

Accepted Answer

A)  there must be no relationship between amount of genetic information and complexity of the organism.
B)  the number of genes per chromosome may vary among organisms,preventing a simple relationship between chromosome number and complexity.
C)  birds and insects probably cannot follow the same mitotic laws as other organisms.
D)  All of the choices are correct.E) A) and B)
F) B) and C) B

Question 4

Generally,animals build an organism using the diploid number of chromosomes.However,insects in the order of ants,wasps and bees can use a haploid-diploid system where adults of one sex are formed with a haploid number of chromosomes.This would mean that

Accepted Answer

A)  a single set of chromosomes is sufficient to code for a functional individual.
B)  a female could determine the sex of the offspring by fertilizing or not fertilizing an egg.
C)  the males and females are not equally "related" to their mothers considering the proportion of genes held in common.
D)  All of the choices are true.
E)  this system in no way differs from regular diploid organisms.F) C) and D)
G) A) and C)

Question 5

are only present in the cell immediately before apoptosis begins.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A)  23.
B)  24.
C)  44.
D)  46.
E)  48.F) B) and C)
G) All of the above

Question 7

The region that contains the genetic information in a bacterial cell is called the

Accepted Answer

A)  nucleus.
B)  nucleoid.
C)  nucleolus.
D)  nucleosome.
E)  nucleoprotein.F) B) and E)
G) C) and D)

Question 8

Which is NOT true about the chromosomes of a multicellular organism?

Accepted Answer

A)  They are made up of DNA and protein.
B)  Each chromosome is replicated into two chromatids during the S phase of interphase.
C)  Each chromosome separates into two daughter chromosomes by binary fission.
D)  All cells contain chromosomes that carry the same genetic information.E) All of the above
F) None of the above

Question 9

Cloning can only be carried out using adult stem cells.

Accepted Answer

A) True 
 B)False

Question 10

The purpose of therapeutic cloning is:

Accepted Answer

A)  to produce an individual to the donor of the nucleus
B)  to produce specialized tissue cells
C)  to stimulate cells that have been arrested in the S phase
D)  none of the aboveE) B) and C)
F) A) and B)

Question 11

Organisms produced as a result of mitosis exhibit a great deal of genetic variation.

Accepted Answer

A) True 
 B)False

Question 12

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 D)
F) C) and D)

Question 13

The critical checkpoints that control the cell cycle are the:

Accepted Answer

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

Question 14

Eukaryotic chromosomes

Accepted Answer

A)  consist of both DNA and protein.
B)  may occur as chromatin.
C)  contain histones responsible for packaging DNA to fit into a small space.
D)  All of the choices are correct.E) C) and D)
F) B) and D)

Question 15

Generally,brain and nerve cells are not able to regenerate after injury because they have left the cell cycle and are unable to return.

Accepted Answer

A) True 
 B)False

Question 16

Below the skin are "stem cells" that divide,with some cells continuing the stem cell line and others being pushed toward the surface to flatten and die and be sloughed off.In the bone marrow other stem cells produce erythrocytes that lose their nucleus and function for a few months in the bloodstream before they too die.Such "dead end" cells that reproduce no further

Accepted Answer

A)  leave the cell cycle in a G0 phase,which immediately follows telophase.
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 17

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 the above
E)  none of the aboveF) D) and E)
G) A) and D)

Question 18

The enzymes that bring about apoptosis are: called caspases.

Accepted Answer

A) True 
 B)False

Question 19

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) All of the above
F) B) and C) A

Question 20

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) A) and B)
F) C) and D)

Exam 9: The Cell Cycle and Cellular Reproduction

Contact inhibition stops normal cells from dividing when they come in contact with neighboring cells,but this is not functional in cancer cells.

Correct Answer
verified

Cytokinesis in plant cells differs from this process in animal cells because

Correct Answer
verified
C

Correct Answer
verified
B

Generally,animals build an organism using the diploid number of chromosomes.However,insects in the order of ants,wasps and bees can use a haploid-diploid system where adults of one sex are formed with a haploid number of chromosomes.This would mean that

Correct Answer
verified

are only present in the cell immediately before apoptosis begins.

Correct Answer
verified

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

Correct Answer
verified

The region that contains the genetic information in a bacterial cell is called the

Correct Answer
verified

Which is NOT true about the chromosomes of a multicellular organism?

Correct Answer
verified

Cloning can only be carried out using adult stem cells.

Correct Answer
verified

The purpose of therapeutic cloning is:

Correct Answer
verified

Organisms produced as a result of mitosis exhibit a great deal of genetic variation.

Correct Answer
verified

The function of mitosis is:

Correct Answer
verified

The critical checkpoints that control the cell cycle are the:

Correct Answer
verified

Eukaryotic chromosomes

Correct Answer
verified

Generally,brain and nerve cells are not able to regenerate after injury because they have left the cell cycle and are unable to return.

Correct Answer
verified

Correct Answer
verified

Angiogenesis:

Correct Answer
verified

The enzymes that bring about apoptosis are: called caspases.

Correct Answer
verified

Which statement below lists the correct steps for binary fission?

Correct Answer
verified
A

The function of mitosis is:

Correct Answer
verified

Exam 9: The Cell Cycle and Cellular Reproduction

Contact inhibition stops normal cells from dividing when they come in contact with neighboring cells,but this is not functional in cancer cells.

Correct AnswerverifiedShow Answer

Cytokinesis in plant cells differs from this process in animal cells because

Correct AnswerverifiedC

Correct AnswerverifiedB

Generally,animals build an organism using the diploid number of chromosomes.However,insects in the order of ants,wasps and bees can use a haploid-diploid system where adults of one sex are formed with a haploid number of chromosomes.This would mean that

Correct AnswerverifiedShow Answer

are only present in the cell immediately before apoptosis begins.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The region that contains the genetic information in a bacterial cell is called the

Correct AnswerverifiedShow Answer

Which is NOT true about the chromosomes of a multicellular organism?

Correct AnswerverifiedShow Answer

Cloning can only be carried out using adult stem cells.

Correct AnswerverifiedShow Answer

The purpose of therapeutic cloning is:

Correct AnswerverifiedShow Answer

Organisms produced as a result of mitosis exhibit a great deal of genetic variation.

Correct AnswerverifiedShow Answer

The function of mitosis is:

Correct AnswerverifiedShow Answer

The critical checkpoints that control the cell cycle are the:

Correct AnswerverifiedShow Answer

Eukaryotic chromosomes

Correct AnswerverifiedShow Answer

Generally,brain and nerve cells are not able to regenerate after injury because they have left the cell cycle and are unable to return.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Angiogenesis:

Correct AnswerverifiedShow Answer

The enzymes that bring about apoptosis are: called caspases.

Correct AnswerverifiedShow Answer

Which statement below lists the correct steps for binary fission?

Correct AnswerverifiedA

The function of mitosis is:

Correct AnswerverifiedShow Answer

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C

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B

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A

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