Question 1

Crossing-over is the only factor that is responsible for the variation that exists between offspring of one set of parents.

Accepted Answer

A) True 
 B)False  False

Question 2

Which of the following proteins would you expect to be a coded for by a proto-oncogene?

Accepted Answer

A)   a growth factor receptor
B)   a DNA repair protein
C)   a protein involved with the G1 checkpoint
D)   an enzyme involved with apoptosis
E)   a DNA replication proteinF) None of the above
G) C) and D)

Question 3

In plant cells, what is responsible for organizing the spindle?

Accepted Answer

A)   centrosomes
B)   centrioles
C)   microtubules
D)   asters
E)   centromeresF) A) and C)
G) C) and E)

Question 4

Which of the following best describes the role of histones?

Accepted Answer

A)   Histones play a role in coding for hereditary features.
B)   Histones make RNA synthesis possible.
C)   Histones are responsible for packaging the DNA so it can fit into a small space.
D)   Histones are not thought to play any role in the cell.
E)   Histones determine the diploid number of chromosomes.F) A) and B)
G) D) and E)

Question 5

What is the difference between the chromosomes in a secondary spermatocyte and those in a spermatid?

Accepted Answer

A)   The chromosomes in secondary spermatocytes consist of two chromatids; the ones in the spermatid consist of only one chromatid.
B)   The chromosomes in a secondary spermatocyte consist of homologous chromosomes; the ones in the spermatid consist of two chromatids.
C)   The chromosomes in the secondary spermatocyte consist of one chromatid; the ones in the spermatid consist of two chromatids.
D)   The secondary spermatocyte is diploid; the spermatid is haploid.
E)   The secondary spermatocyte is haploid; the spermatid is diploid.F) All of the above
G) B) and D)

Question 6

You are looking at a single chromosome in a human being. Assuming there is no crossing over, what is the source of all the genes on this chromosome?

Accepted Answer

A)   mother
B)   father
C)   either the mother or father
D)   a combination of both mother and father
E)   it is impossible to tell given this informationF) C) and E)
G) B) and C)

Question 7

Following a cut or scrape, which process repairs your skin?

Accepted Answer

A)   meiosis
B)   meiosis and mitosis
C)   mitosis
D)   mitosis and apoptosis
E)   apoptosisF) None of the above
G) C) and E)

Question 8

A basic difference between spermatogenesis and oogenesis is that in oogenesis

Accepted Answer

A)   four functional eggs are produced.
B)   mitosis instead of meiosis occurs.
C)   both sperm and egg are produced.
D)   one functional egg is produced.
E)   the chromosome number is not divided in half.F) C) and D)
G) A) and B) D

Question 9

During mitosis, separation of the sister chromatids ensures that each daughter cell will receive two copies of each type of chromosome.

Accepted Answer

A) True 
 B)False

Question 10

Growth factors that are transported through the blood play what role in the cell cycle?

Accepted Answer

A)   an internal signal that tells the cell to stop dividing and repair its DNA
B)   an internal signal that functions as an executioner
C)   an internal signal to tell the cell which stage of the cell cycle to enter next
D)   an external signal to tell the cell how long it should spend in each phase of the cell cycle
E)   an external signal to tell the cell whether or not to divideF) A) and C)
G) C) and D)

Question 11

Which of the following is a correct association?

Accepted Answer

A)   S stage-cell growth
B)   M stage-DNA replication
C)   interphase-shortest stage of the cell cycle
D)   G1 stage-cytokinesis
E)   G2 stage-the cell synthesizes the proteins needed for cell divisionF) B) and C)
G) A) and E)

Question 12

If their sperm contain 32 chromosomes, how many chromosomes do diploid cells in horses contain?

Accepted Answer

A)   46
B)   23
C)   32
D)   64
E)   128F) A) and E)
G) B) and E)

Question 13

If the diploid chromosome number is 16, the chromosome number of each gamete will be

Accepted Answer

A)   4.
B)   8.
C)   12.
D)   16.
E)   32.F) A) and B)
G) B) and E)

Question 14

Which sequence of stages in mitosis is correct?

Accepted Answer

A)   prophase, metaphase, interphase, telophase, prometaphase
B)   metaphase, anaphase, prophase, prometaphase, telophase
C)   anaphase, prometaphase, interphase, telophase, prophase
D)   prophase, prometaphase, metaphase, anaphase, telophase
E)   prometaphase, interphase, metaphase, prophase, anaphaseF) A) and C)
G) B) and C)

Question 15

Oogenesis

Accepted Answer

A)   occurs in the ovary.
B)   produces eggs with 23 chromosomes.
C)   produces four equal-size eggs.
D)   occurs in the ovary and produces eggs with 23 chromosomes.
E)   occurs in the ovary, produces four equal-sized eggs with 23 chromosomes each.F) C) and D)
G) B) and D)

Question 16

The cell cycle consists of

Accepted Answer

A)   mitosis and interphase.
B)   meiosis and interphase.
C)   prophase and interphase.
D)   metaphase and interphase.
E)   changes from a haploid to a diploid state.F) A) and B)
G) A) and C)

Question 17

Centrioles are necessary to the process of mitosis in all organisms.

Accepted Answer

A) True 
 B)False

Question 18

Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of replicating the DNA. All of the DNA is found within a single nucleus. Which phase of the cell cycle is this cell in?

Accepted Answer

A)   M
B)   S
C)   G1
D)   G2
E)   cytokinesisF) All of the above
G) B) and D)

Question 19

The mitotic stage of cell division consists of

Accepted Answer

A)   DNA synthesis and DNA degradation.
B)   mitosis and cytokinesis.
C)   duplication and division.
D)   cell growth and cell death.
E)   meiosis and mitosis.F) B) and C)
G) C) and D)

Question 20

If the total number of chromosomes in a cell is six, then after mitosis there will be

Accepted Answer

A)   six chromosomes in each daughter cell.
B)   three chromosomes in each daughter cell.
C)   12 chromosomes in each daughter cell.
D)   two chromosomes in each daughter cell.
E)   three chromosomes in one daughter cell and six chromosomes in the other cell.F) A) and E)
G) C) and D) A

Exam 5: Cell Division

Crossing-over is the only factor that is responsible for the variation that exists between offspring of one set of parents.

Correct AnswerverifiedFalse

Which of the following proteins would you expect to be a coded for by a proto-oncogene?

Correct AnswerverifiedShow Answer

In plant cells, what is responsible for organizing the spindle?

Correct AnswerverifiedShow Answer

Which of the following best describes the role of histones?

Correct AnswerverifiedShow Answer

What is the difference between the chromosomes in a secondary spermatocyte and those in a spermatid?

Correct AnswerverifiedShow Answer

You are looking at a single chromosome in a human being. Assuming there is no crossing over, what is the source of all the genes on this chromosome?

Correct AnswerverifiedShow Answer

Following a cut or scrape, which process repairs your skin?

Correct AnswerverifiedShow Answer

A basic difference between spermatogenesis and oogenesis is that in oogenesis

Correct AnswerverifiedD

During mitosis, separation of the sister chromatids ensures that each daughter cell will receive two copies of each type of chromosome.

Correct AnswerverifiedShow Answer

Growth factors that are transported through the blood play what role in the cell cycle?

Correct AnswerverifiedShow Answer

Which of the following is a correct association?

Correct AnswerverifiedShow Answer

If their sperm contain 32 chromosomes, how many chromosomes do diploid cells in horses contain?

Correct AnswerverifiedShow Answer

If the diploid chromosome number is 16, the chromosome number of each gamete will be

Correct AnswerverifiedShow Answer

Which sequence of stages in mitosis is correct?

Correct AnswerverifiedShow Answer

Oogenesis

Correct AnswerverifiedShow Answer

The cell cycle consists of

Correct AnswerverifiedShow Answer

Centrioles are necessary to the process of mitosis in all organisms.

Correct AnswerverifiedShow Answer

Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of replicating the DNA. All of the DNA is found within a single nucleus. Which phase of the cell cycle is this cell in?

Correct AnswerverifiedShow Answer

The mitotic stage of cell division consists of

Correct AnswerverifiedShow Answer

If the total number of chromosomes in a cell is six, then after mitosis there will be

Correct AnswerverifiedA

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