Question 1

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

Question 2

The second meiotic division is essentially a mitotic division except for the fact that the cells produced are

Accepted Answer

A)  haploid. 
B)  diploid. 
C)  polyploid. 
D)  autosomal. 
E)  somatic. 
A)  haploid. 
B)  diploid. 
C)  polyploid. 
D)  autosomal. 
E)  somatic.

Question 3

The nuclear membrane reappears in mitosis during

Accepted Answer

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

Question 4

What forms the contractile ring in animal cells?

Accepted Answer

A)  membrane vesicles 
B)  actin filaments 
C)  cellulose fibrils 
D)  cell wall 
E)  histones 
A)  membrane vesicles 
B)  actin filaments 
C)  cellulose fibrils 
D)  cell wall 
E)  histones

Question 5

In which stage of mitosis do the chromosomes line up in the center of the cell?

Accepted Answer

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

Question 6

If a cell stops at the G1 checkpoint, this is most likely due to what problem?

Accepted Answer

A)  The DNA has not finished replicating. 
B)  The chromosomes are not aligned properly. 
C)  There is DNA damage. 
D)  The cell is cancerous. 
E)  There is no problem. The cell normally stops at the G1 checkpoint. 
A)  The DNA has not finished replicating. 
B)  The chromosomes are not aligned properly. 
C)  There is DNA damage. 
D)  The cell is cancerous. 
E)  There is no problem. The cell normally stops at the G1 checkpoint.

Question 7

Technically, mitosis refers to nuclear division and not cytoplasmic division.

Accepted Answer

A) True 
 B)False

Question 8

The formation of sperm is termed

Accepted Answer

A)  oogenesis. 
B)  homologous formation. 
C)  spermatogenesis. 
D)  gametogenesis 
E)  mitosis. 
A)  oogenesis. 
B)  homologous formation. 
C)  spermatogenesis. 
D)  gametogenesis 
E)  mitosis.

Question 9

The length of DNA in each chromosome is longer than the diameter of the cell nucleus.

Accepted Answer

A) True 
 B)False

Question 10

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

Question 11

You are examining a cell under the microscope that is undergoing cell division and cannot find any asters. What else would be absent in this cell?

Accepted Answer

A)  a cell plate 
B)  centrosomes 
C)  a spindle 
D)  a cleavage furrow 
E)  chromosomes 
A)  a cell plate 
B)  centrosomes 
C)  a spindle 
D)  a cleavage furrow 
E)  chromosomes

Question 12

Which of the following is a correct association?

Accepted Answer

A)  cytokinesis-division of the chromosomes 
B)  centromere-forms spindle fibers during prophase 
C)  haploid-having two copies of each chromosome 
D)  sister chromatids-two identical chromosome strands still attached at the centromere 
E)  mitosis-when a cell duplicates and then divides twice to reduce chromosome number by half 
A)  cytokinesis-division of the chromosomes 
B)  centromere-forms spindle fibers during prophase 
C)  haploid-having two copies of each chromosome 
D)  sister chromatids-two identical chromosome strands still attached at the centromere 
E)  mitosis-when a cell duplicates and then divides twice to reduce chromosome number by half

Question 13

Explain what is meant by the term homologous chromosomes.

Accepted Answer

Answers will vary. When a cell

Question 14

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

Accepted Answer

A)  Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids
Metaphase of mitosis: single chromosomes composed of two sister chromatids 
B)  Metaphase 1 of meiosis: homologous chromosomes
Metaphase of mitosis: homologous chromosomes 
C)  Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids
Metaphase of mitosis: single chromosomes composed of one sister chromatid 
D)  Metaphase 1 of meiosis: homologous chromosomes
Metaphase of mitosis: chromosomes composed of two sister chromatids 
E)  Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids
Metaphase of mitosis: homologous chromosomes 
A)  Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids
Metaphase of mitosis: single chromosomes composed of two sister chromatids 
B)  Metaphase 1 of meiosis: homologous chromosomes
Metaphase of mitosis: homologous chromosomes 
C)  Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids
Metaphase of mitosis: single chromosomes composed of one sister chromatid 
D)  Metaphase 1 of meiosis: homologous chromosomes
Metaphase of mitosis: chromosomes composed of two sister chromatids 
E)  Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids
Metaphase of mitosis: homologous chromosomes

Question 15

During which phases of mitosis do the chromosomes look like Xs?

Accepted Answer

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

Question 16

Synapsis occurs during what stage of meiosis?

Accepted Answer

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

Question 17

Which of the following processes occurs in both mitosis and meiosis?

Accepted Answer

A)  homologous chromosomes pair up 
B)  two series of cell divisions 
C)  sister chromosomes separating during the second division 
D)  single chromosomes line up along the metaphase plate 
E)  fertilization restores the diploid number 
A)  homologous chromosomes pair up 
B)  two series of cell divisions 
C)  sister chromosomes separating during the second division 
D)  single chromosomes line up along the metaphase plate 
E)  fertilization restores the diploid number

Question 18

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 protein 
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 protein

Question 19

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 20

Hormones that deliver a signal to the plasma membrane of target cells are known as

Accepted Answer

A)  cyclins. 
B)  internal and external signals. 
C)  growth factors. 
D)  checkpoints. 
E)  proto-oncogenes. 
A)  cyclins. 
B)  internal and external signals. 
C)  growth factors. 
D)  checkpoints. 
E)  proto-oncogenes.

Exam 5: Cell Division

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

The second meiotic division is essentially a mitotic division except for the fact that the cells produced are

The nuclear membrane reappears in mitosis during

What forms the contractile ring in animal cells?

In which stage of mitosis do the chromosomes line up in the center of the cell?

If a cell stops at the G1 checkpoint, this is most likely due to what problem?

Technically, mitosis refers to nuclear division and not cytoplasmic division.

The formation of sperm is termed

The length of DNA in each chromosome is longer than the diameter of the cell nucleus.

In humans, the diploid number of chromosomes is

You are examining a cell under the microscope that is undergoing cell division and cannot find any asters. What else would be absent in this cell?

Which of the following is a correct association?

Explain what is meant by the term homologous chromosomes.

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

During which phases of mitosis do the chromosomes look like Xs?

Synapsis occurs during what stage of meiosis?

Which of the following processes occurs in both mitosis and meiosis?

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

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.

Hormones that deliver a signal to the plasma membrane of target cells are known as

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If a cell stops at the G₁checkpoint, this is most likely due to what problem?