Question 1

Cell division, the climax of the cell cycle, consists of

Accepted Answer

A)  chromosome replication and separation.
B)  the breakup of the nucleus at the metaphase plate.
C)  cytokinesis plus mitosis or meiosis.
D)  the formation of a new karyotype.E) A) and D)
F) All of the above

Question 2

During the S phase, the cell

Accepted Answer

A)  duplicates its DNA.
B)  grows in size to prepare for DNA synthesis.
C)  completes its preparation for mitosis.
D)  rests between divisions.E) A) and B)
F) A) and D)

Question 3

At the end of telophase the cell is ready for physical division into two cells, a process called ____________________.

Accepted Answer

The answer of At the end of telophase the cell...

Question 4

The mitotic spindle guides the movement of chromosomes during certain stages of mitosis.

Accepted Answer

A) True 
 B)False

Question 5

The parthenogenetic whiptail lizards have maintained their population levels primarily because they live in an extremely stable environment, a situation that minimizes the value of genetic diversity within a population.

Accepted Answer

A) True 
 B)False

Question 6

Only meiosis could lead to the production of new

Accepted Answer

A)  skin cells.
B)  brain cells.
C)  sperm cells.
D)  liver cells.E) B) and D)
F) B) and C)

Question 7

When examining the rapidly dividing cells of a fish embryo, you notice a cell that seems to contain two nuclei. The middle of the cell is pinched inward. This cell must be in _____ of mitosis.

Accepted Answer

A)  prophase
B)  telophase
C)  metaphase
D)  anaphaseE) A) and C)
F) A) and B)

Question 8

Which set of symbols represents the stages of interphase?

Accepted Answer

A)  G0, G1, and G2
B)  S1, S2, and G0
C)  G0, G1, and S
D)  S, G1, and G2E) B) and C)
F) A) and B)

Question 9

Some daughter cells are described as clones; for this description to be appropriate, the daughter cells must

Accepted Answer

A)  show the same differentiation characteristics as the parent cell.
B)  separate from one another and experience an independent existence.
C)  contain a set of DNA that is identical to that of the parent cell.
D)  have been produced by meiotic cell division.E) B) and D)
F) None of the above

Question 10

Plants perform cytokinesis differently than animals because

Accepted Answer

A)  plant cytokinesis takes place during interphase, but animal cytokinesis takes place in cell division.
B)  plant chromosomes are more difficult to separate than animal chromosomes.
C)  the rigid cell wall of the plant cell prevents the plasma membrane from pinching inward like it does in animal cells.
D)  the centrosomes of plants do not replicate prior to cell division.E) None of the above
F) C) and D)

Question 11

DNA molecules are both exceptionally long (6 feet in humans)and exceptionally thin; to minimize breakage yet facilitate transcription, the DNA is wrapped around ____________________ to form a complex know as chromatin.

Accepted Answer

The answer of DNA molecules are both exceptionally long (6...

Question 12

During anaphase I of meiosis,

Accepted Answer

A)  sister chromatids are pulled apart toward opposite poles.
B)  each member of a bivalent moves toward a different pole.
C)  all bivalents are pulled to the same pole.
D)  paired homologues become attached to each other by microtubules.E) A) and B)
F) B) and C)

Question 13

The G₀ phase of the cell cycle is distinguished by

Accepted Answer

A)  an active preparation for DNA synthesis.
B)  a doubling of chromosomes.
C)  an absence of preparation for DNA synthesis.
D)  the appearance of a metaphase plate.E) A) and D)
F) C) and D)

Question 14

The sequence of events in meiosis II is prophase II, ____________________, anaphase II, and telophase II, then cytokinesis.

Accepted Answer

The answer of The sequence of events in meiosis II...

Question 15

Lily plants sometimes have twice as many chromosomes per cell as their parent plants had. Which of the following explains how this might have happened?

Accepted Answer

A)  The lily's sister chromatids failed to separate during meiosis.
B)  The chromosome number of the lily went from 2n to 1n.
C)  The lily gametes fused during mitosis.
D)  The parent plant lost half of its chromosomes during mitosis.E) B) and C)
F) All of the above

Question 16

The goal of mitosis is to

Accepted Answer

A)  form two equal daughter nuclei.
B)  form chromatin strands.
C)  loop chromatin into chromosomes.
D)  package chromosomes into chromatin.E) None of the above
F) All of the above

Question 17

Meiosis I is called a reduction division because the

Accepted Answer

A)  need for mitosis is reduced.
B)  time it takes for the cell to divide is reduced.
C)  chromosome number goes from diploid to haploid.
D)  cell size is reduced.E) A) and B)
F) C) and D)

Question 18

After a single cell undergoes meiosis, how many new cells will be produced?

Accepted Answer

A)  2
B)  4
C)  12
D)  16E) A) and C)
F) B) and C)

Question 19

When appropriately prompted, diploid individuals of Ulva prolifera form spores that germinate to become haploid individuals. How might diploid individuals be created to complete the life cycle?

Accepted Answer

A)  Haploid individuals meiotically produce egg and sperm cells, which subsequently fuse.
B)  Some haploid individuals experience mitosis without cytokinesis followed by nuclear fusion.
C)  Some individuals differentiate to become haploid gametes and then fuse to produce a diploid zygote.
D)  Haploid individuals experience two sequential S phases in their cell cycle to reestablish the diploid state.E) None of the above
F) C) and D)

Question 20

The fact that DNA is distributed into homologous pairs allows

Accepted Answer

A)  cells to reduce their chromosome number by half during meiosis.
B)  a cell to begin meiosis with only half of its DNA.
C)  sex chromosomes to exist in some cells.
D)  microtubules to attach to only half of the chromosomes.E) A) and B)
F) A) and C)

Exam 10: Cell Division

When appropriately prompted, diploid individuals of Ulva prolifera form spores that germinate to become haploid individuals. How might diploid individuals be created to complete the life cycle?

Correct AnswerverifiedShow Answer

Only meiosis could lead to the production of new

Correct AnswerverifiedShow Answer

The mitotic spindle guides the movement of chromosomes during certain stages of mitosis.

Correct AnswerverifiedShow Answer

When examining the rapidly dividing cells of a fish embryo, you notice a cell that seems to contain two nuclei. The middle of the cell is pinched inward. This cell must be in _____ of mitosis.

Correct AnswerverifiedShow Answer

Plants perform cytokinesis differently than animals because

Correct AnswerverifiedShow Answer

Some daughter cells are described as clones; for this description to be appropriate, the daughter cells must

Correct AnswerverifiedShow Answer

Cell division, the climax of the cell cycle, consists of

Correct AnswerverifiedShow Answer

During anaphase I of meiosis,

Correct AnswerverifiedShow Answer

At the end of telophase the cell is ready for physical division into two cells, a process called ____________________.

Correct AnswerverifiedShow Answer

The G₀ phase of the cell cycle is distinguished by

Correct AnswerverifiedShow Answer

DNA molecules are both exceptionally long (6 feet in humans)and exceptionally thin; to minimize breakage yet facilitate transcription, the DNA is wrapped around ____________________ to form a complex know as chromatin.

Correct AnswerverifiedShow Answer

The parthenogenetic whiptail lizards have maintained their population levels primarily because they live in an extremely stable environment, a situation that minimizes the value of genetic diversity within a population.

Correct AnswerverifiedShow Answer

The fact that DNA is distributed into homologous pairs allows

Correct AnswerverifiedShow Answer

Meiosis I is called a reduction division because the

Correct AnswerverifiedShow Answer

Which set of symbols represents the stages of interphase?

Correct AnswerverifiedShow Answer

During the S phase, the cell

Correct AnswerverifiedShow Answer

The goal of mitosis is to

Correct AnswerverifiedShow Answer

Lily plants sometimes have twice as many chromosomes per cell as their parent plants had. Which of the following explains how this might have happened?

Correct AnswerverifiedShow Answer

The sequence of events in meiosis II is prophase II, ____________________, anaphase II, and telophase II, then cytokinesis.

Correct AnswerverifiedShow Answer

After a single cell undergoes meiosis, how many new cells will be produced?

Correct AnswerverifiedShow Answer

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