Question 1

What structure is formed by two sister chromatids being held together by a centromere?

Accepted Answer

A)   duplicated chromosome
B)   chromatin
C)   histones
D)   nucleosome
E)   DNA

Question 2

What structure holds two sister chromatids together?

Accepted Answer

A)   centromere
B)   centriole
C)   chromatin
D)   spindle
E)   centrosome

Question 3

When during the cell cycle are chromosomes visible under a microscope?

Accepted Answer

A)   only during interphase
B)   only when they are being copied
C)   during mitosis
D)   only during the G 1 phase
E)   chromosomes are always visible

Question 4

Cytokinesis in plants occurs as ________ and in animals as ________.

Accepted Answer

A)   actin fibers pull the membrane inward until the two sides touch; the Golgi apparatus produces membrane-bound vesicles filled with materials to make the cell wall
B)   the Golgi apparatus produces membrane-bound vesicles filled with materials to make the cell wall; actin fibers pull the membrane inward until the two sides touch
C)   the centrosome produces membrane-bound vesicles filled with materials to make the cell wall; the Golgi apparatus produces actin fibers to pull the membrane inward until the two sides touch
D)   actin fibers interact to make the cell wall; the cleavage furrow pulls the membrane inward until the two sides touch
E)   the Golgi apparatus produces a cleavage furrow; actin fibers pull the membrane inward until the two sides touch

Question 5

Which of the following is an inaccurate statement about mitosis?

Accepted Answer

A)   the cells arising from mitosis are genetically alike
B)   the process of nuclear division is followed by cytokinesis
C)   spindle fibers are involved in the movement of chromosomes during mitosis
D)   both sexually and asexually reproducing organisms utilize the process of mitosis
E)   the cells arising from mitosis contain only half of the necessary genetic material

Question 6

Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. Which of the following statements explains why this occurs?

Accepted Answer

A)   The cells become deficient in cyclin.
B)   The petri dish inhibits the cells' growth.
C)   Cell division can be inhibited by the proximity of other cells of the same type, a process called contact inhibition.
D)   Most cells grown in petri dishes have gone through apoptosis.
E)   The cells have differentiated into more specialized cells.

Question 7

During which stage of the cell cycle do the chromosomes duplicate?

Accepted Answer

A)   interphase: S
B)   interphase: G 1
C)   interphase: G 2
D)   prophase
E)   telophase

Question 8

The figure below shows a cell in which stage of the cell cycle?

Accepted Answer

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

Question 9

Embryonic cells and cancer cells are similar because

Accepted Answer

A)   DNA polymerase is inactive.
B)   telomerase is active.
C)   telomerase is inactive.
D)   RNA polymerase is inactive.
E)   proto-oncogenes are inactive.

Question 10

Proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle, are called

Accepted Answer

A)   centromeres.
B)   kinetochores.
C)   centrioles.
D)   proton pumps.
E)   cyclins.

Question 11

The term metastasis refers to the fact that cancer cells tend to

Accepted Answer

A)   destroy.
B)   divide.
C)   decline.
D)   shrink.
E)   spread.

Question 12

Cancer is a disorder in which some cells have lost the ability to control their

Accepted Answer

A)   size.
B)   spindle fibers.
C)   rate of cell division.
D)   surface area.
E)   volume.

Question 13

Differentiated cells, such as nerve cells, would be in which of the following stages of the cell cycle?

Accepted Answer

A)   G 1
B)   G 0
C)   G 2
D)   M
E)   R

Question 14

Cytokinesis usually, but not always, follows mitosis. If a cell undergoes mitosis and not cytokinesis, this would result in

Accepted Answer

A)   a cell with a single large nucleus.
B)   a cell with two nuclei.
C)   cells with abnormally small nuclei.
D)   feedback responses that prevent mitosis.
E)   death of the cell line.

Question 15

Which of the following statements is correct regarding the events of the cell cycle?

Accepted Answer

A)   DNA is duplicated during the G 1 and G 2 phases
B)   DNA replicates during cytokinesis
C)   the M phase is usually the longest phase of the cell cycle
D)   interphase consists of G 1, S, and G 2
E)   the cell enters a non-dividing state in the G 2 phase.

Question 16

Cancer cells have abnormal chromosomes because they express telomerase when they should not.

Accepted Answer

A) True 
 B)False

Question 17

The G 2 checkpoint prevents the cell cycle from continuing until

Accepted Answer

A)   it is known for sure if the cell will divide.
B)   the DNA has finished replicating.
C)   the chromosomes are properly attached to the spindle fibers.
D)   all the organelles have been duplicated.
E)   the centrosomes have duplicated.

Question 18

What is the structure that holds together the two sister chromatids that form a chromosome?

Accepted Answer

A)   centromere
B)   nucleosome
C)   histone
D)   nucleus
E)   chromatin

Question 19

The figure below shows a cell in the mitotic stage of

Accepted Answer

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

Question 20

The presence of which protein is required in order for chromatin to compact correctly within the nucleus?

Accepted Answer

A)   histone
B)   nucleosome
C)   actin
D)   chromatid
E)   myosin

Exam 8: Cellular Reproduction

Which of the following statements is correct regarding the events of the cell cycle?

Correct AnswerverifiedShow Answer

When during the cell cycle are chromosomes visible under a microscope?

Correct AnswerverifiedShow Answer

The figure below shows a cell in the mitotic stage of

Correct AnswerverifiedShow Answer

The term metastasis refers to the fact that cancer cells tend to

Correct AnswerverifiedShow Answer

What structure is formed by two sister chromatids being held together by a centromere?

Correct AnswerverifiedShow Answer

Cytokinesis in plants occurs as ________ and in animals as ________.

Correct AnswerverifiedShow Answer

Which of the following is an inaccurate statement about mitosis?

Correct AnswerverifiedShow Answer

Proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle, are called

Correct AnswerverifiedShow Answer

Cytokinesis usually, but not always, follows mitosis. If a cell undergoes mitosis and not cytokinesis, this would result in

Correct AnswerverifiedShow Answer

Differentiated cells, such as nerve cells, would be in which of the following stages of the cell cycle?

Correct AnswerverifiedShow Answer

Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. Which of the following statements explains why this occurs?

Correct AnswerverifiedShow Answer

What is the structure that holds together the two sister chromatids that form a chromosome?

Correct AnswerverifiedShow Answer

What structure holds two sister chromatids together?

Correct AnswerverifiedShow Answer

Cancer is a disorder in which some cells have lost the ability to control their

Correct AnswerverifiedShow Answer

The G 2 checkpoint prevents the cell cycle from continuing until

Correct AnswerverifiedShow Answer

Embryonic cells and cancer cells are similar because

Correct AnswerverifiedShow Answer

The presence of which protein is required in order for chromatin to compact correctly within the nucleus?

Correct AnswerverifiedShow Answer

The figure below shows a cell in which stage of the cell cycle?

Correct AnswerverifiedShow Answer

During which stage of the cell cycle do the chromosomes duplicate?

Correct AnswerverifiedShow Answer

Cancer cells have abnormal chromosomes because they express telomerase when they should not.

Correct AnswerverifiedShow Answer

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Cytokinesis in plants occurs as and in animals as .

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The G ₂ checkpoint prevents the cell cycle from continuing until

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