Question 1

In humans,the diploid number of chromosomes is

Accepted Answer

A)   20.
B)   46.
C)   23.
D)   variable depending on whether male or female.
E)   92.

Question 2

What lines up at the metaphase plate during metaphase II of meiosis and metaphase of mitosis?

Accepted Answer

A)   each chromosome composed of two sister chromatids at both
B)   homologous chromosomes at both
C)   each chromosome composed of two sister chromatids for meiosis, each chromosome composed of one sister chromatid for mitosis
D)   homologous chromosomes for meiosis, each chromosome composed of two sister chromatids for mitosis
E)   each chromosome composed of two sister chromatids for meiosis, homologous chromosomes for mitosis

Question 3

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.

Question 4

Would it be possible to observe crossing-over between sister chromatids? Why or why not?

Accepted Answer

A)   No. Crossing-over is not observable.
B)   No. Sister chromatids are not present within the same nucleus.
C)   No. Since they are genetically identical you could not tell the difference without labeling the chromatids.
D)   Yes. Sister chromatids look different from each other.
E)   Yes. One sister chromatid comes from mother and one comes from father.

Question 5

During which phase will homologous chromosomes separate?

Accepted Answer

A)   Anaphase I
B)   Anaphase II
C)   Prophase
D)   Anaphase
E)   Metaphase I

Question 6

List in order the stages of the cell cycle.

Accepted Answer

Interphase - prophas...

Question 7

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

Question 8

Which of the following descriptions does not occur during apoptosis?

Accepted Answer

A)   cell rounds up
B)   cells lose contact with neighbors
C)   nucleus fragments
D)   DNA is duplicated
E)   plasma membrane develops blisters

Question 9

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 determine the structure of the chromosome.
D)   Histones are not thought to play any role in the cell.
E)   Histones determine the diploid number of chromosomes.

Question 10

Which type of genes,if abnormally activated such that the protein is always present and active,can result in cancer?

Accepted Answer

A)   tumor suppressor genes
B)   initator caspase genes
C)   proto-oncogenes
D)   DNA repair protein genes
E)   executioner caspase genes

Question 11

Mitotic division is the normal process of cell reproduction to build and maintain the body of an organism,while meiosis takes place only in the formation of gametes for reproduction.

Accepted Answer

A) True 
 B)False

Question 12

During what stage of mitosis does the nuclear envelope disappear and the chromosomes become distinct?

Accepted Answer

A)   interphase
B)   prophase
C)   metaphase
D)   anaphase
E)   telophase

Question 13

Which of the following is not a reason why two children born to the same parents [not identical twins] are unlikely to have the same genetic makeup?

Accepted Answer

A)   Crossing over recombines portions of sister chromatids.
B)   Fertilization provides a new pairing of chromosomes.
C)   Each sperm or egg has a random assortment of chromosomes, half from each pair.
D)   Chromosomes align themselves independently during meiosis I.
E)   Since though they are produced at different times, all sperm will be genetically different from all other sperm.

Question 14

During what stage do homologous chromosomes separate from each other?

Accepted Answer

A)   prophase
B)   anaphase I
C)   anaphase II
D)   metaphase I
E)   metaphase II

Question 15

One difference between spermatogenesis and oogenesis is

Accepted Answer

A)   spermatogenesis results in three times more cells.
B)   spermatogenesis produces polar bodies in an effort to keep nutrients for the one sperm cell.
C)   oogenesis stops at the second meiotic division and awaits fertilization by a sperm before finishing meiosis.
D)   spermatogenesis results after fertilization.
E)   oogensis produces 2 eggs and spermatogenesis produces 4 sperms.

Question 16

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 stage of the cell cycle is this cell in?

Accepted Answer

A)   M phase
B)   S phase
C)   G1 phase
D)   G2 phase
E)   cytokinesis

Question 17

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.

Question 18

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

Accepted Answer

A)   centrosomes
B)   centrioles
C)   microtubules
D)   aster
E)   centromeres

Question 19

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)   a caspase
E)   a DNA replication protein

Question 20

Which of the following statements is NOT true about oogenesis in humans?

Accepted Answer

A)   It occurs in the ovary.
B)   The egg will contain 23 chromosomes.
C)   Four equal size daughter cells will form.
D)   Three nonfunctional polar bodies will form.
E)   Once started, it will not necessarily go to completion.

Exam 5: Cell Division

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

Correct AnswerverifiedShow Answer

The mitotic stage of cell division consists of

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 stage of the cell cycle is this cell in?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What lines up at the metaphase plate during metaphase II of meiosis and metaphase of mitosis?

Correct AnswerverifiedShow Answer

Which of the following descriptions does not occur during apoptosis?

Correct AnswerverifiedShow Answer

Which of the following best describes the role of histones?

Correct AnswerverifiedShow Answer

Which of the following is not a reason why two children born to the same parents [not identical twins] are unlikely to have the same genetic makeup?

Correct AnswerverifiedShow Answer

Would it be possible to observe crossing-over between sister chromatids? Why or why not?

Correct AnswerverifiedShow Answer

During which phase will homologous chromosomes separate?

Correct AnswerverifiedShow Answer

Mitotic division is the normal process of cell reproduction to build and maintain the body of an organism,while meiosis takes place only in the formation of gametes for reproduction.

Correct AnswerverifiedShow Answer

Which of the following statements is NOT true about oogenesis in humans?

Correct AnswerverifiedShow Answer

During what stage do homologous chromosomes separate from each other?

Correct AnswerverifiedShow Answer

List in order the stages of the cell cycle.

Correct AnswerverifiedInterphase - prophas...View AnswerShow Answer

During what stage of mitosis does the nuclear envelope disappear and the chromosomes become distinct?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

One difference between spermatogenesis and oogenesis is

Correct AnswerverifiedShow Answer

Which type of genes,if abnormally activated such that the protein is always present and active,can result in cancer?

Correct AnswerverifiedShow Answer

The cell cycle consists of

Correct AnswerverifiedShow Answer

In humans,the diploid number of chromosomes is

Correct AnswerverifiedShow Answer

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Interphase - prophas...
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