Question 1

DNA and histones form bead-like globules known as

Accepted Answer

A)   nucleotides.
B)   the chromatin network.
C)   centrosomes.
D)   nucleosomes.
E)   mesosomes.F) None of the above
G) All of the above

Question 2

All of the following statements are true about mitosis except

Accepted Answer

A)   the cells arising from the process are genetically alike.
B)   the process of mitosis is followed by cytokinesis.
C)   spindle fibers are involved in the movement of chromosomes.
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.F) B) and C)
G) A) and E)

Question 3

Ben was looking at onion root tip cells under the microscope in biology class. He saw one cell that had two nuclei within it. What stage of the cell cycle was this cell in?

Accepted Answer

A)   anaphase
B)   interphase
C)   metaphase
D)   prophase
E)   telophase/cytokinesisF) C) and D)
G) B) and C)

Question 4

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.F) B) and E)
G) A) and D)

Question 5

If there are 20 centromeres in a cell, how many chromosomes are there?

Accepted Answer

A)   10
B)   20
C)   30
D)   40
E)   80F) B) and D)
G) B) and E)

Question 6

Cancer will occur if one copy of a mutant tumor suppressor gene is inherited.

Accepted Answer

A) True 
 B)False

Question 7

The figure below shows a cell in the mitotic stage of

Accepted Answer

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G1 of the cell cycle?

Accepted Answer

A)   The daughter cells have half the amount of cytoplasm and half the amount of DNA.
B)   The daughter cells have half the number of chromosomes and half the amount of DNA.
C)   The daughter cells have the same number of chromosomes and half the amount of DNA.
D)   The daughter cells have the same number of chromosomes and the same amount of DNA.
E)   The daughter cells have the same number of chromosomes and twice the amount of DNA.F) C) and D)
G) A) and E)

Question 10

Apoptosis

Accepted Answer

A)   is a process that repairs damaged DNA.
B)   occurs as telomeres increase in length.
C)   can be used to remove damaged or malfunctioning cells.
D)   increases the number of somatic cells.
E)   increases the number of gamete cells.F) B) and D)
G) B) and C)

Question 11

Which of the following organelles would be abundant and in close proximity to the cell plate in a plant cell undergoing cytokinesis?

Accepted Answer

A)   centrioles
B)   Golgi apparatus
C)   rough endoplasmic reticulum
D)   lysosomes
E)   central vacuoleF) A) and E)
G) A) and C)

Question 12

Multicellular organisms undergo mitotic cell division to

Accepted Answer

A)   produce new organisms.
B)   produce gametes.
C)   increase the variability of the population.
D)   increase the size of the organism.
E)   facilitate sexual reproduction.F) D) and E)
G) None of the above

Question 13

Stem cells that contain telomerase can be found in adults.

Accepted Answer

A) True 
 B)False

Question 14

A mutation that causes an increase in function in a tumor suppressor gene would not likely cause cancer because a tumor suppressor protein

Accepted Answer

A)   normally promotes the cell cycle.
B)   normally responds to growth factors.
C)   activates a signal transduction pathway.
D)   inactivates growth factors.
E)   does not promote cell division.F) D) and E)
G) None of the above

Question 15

Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?

Accepted Answer

A)   When cells come into contact with other cells, they stop growing.
B)   The controls on cell growth and division can be turned on and off.
C)   Cell division can be regulated by factors outside of the cell.
D)   Cells continue to grow as long as there is adequate space.
E)   All answers are valid and correct.F) All of the above
G) A) and B)

Question 16

Cells that do not receive the correct signals to move from G1 into S phase will enter G0 and therefore will

Accepted Answer

A)   immediately move into the mitotic phase.
B)   never be able to undergo mitosis.
C)   be able to produce gametes through meiosis.
D)   stay in an undifferentiated state and become stem cells.
E)   not undergo mitotic division unless it later receives the go-ahead signal.F) D) and E)
G) A) and B)

Question 17

A proto-oncogene differs from a tumor suppressor gene because a proto-oncogene

Accepted Answer

A)   may cause cancer if mutated, whereas a tumor suppressor gene cannot.
B)   stimulates mitosis in a normal cell, whereas a tumor suppressor gene inhibits mitosis.
C)   only activates enzymes in a cell that allows metastasis.
D)   inhibits the cell cycle, whereas a tumor suppressor accelerates the cell cycle.
E)   promotes meiosis, whereas a tumor suppressor gene promotes mitosis.F) C) and E)
G) B) and C)

Question 18

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)   myosinF) B) and E)
G) A) and C)

Question 19

A positive genetic test for telomerase indicates that

Accepted Answer

A)   RB is inactive.
B)   a cell is undergoing apoptosis.
C)   proto-oncogenes have not yet mutated.
D)   a cell is probably cancerous.
E)   tumor suppressors are active.F) B) and D)
G) A) and D)

Question 20

Rebecca found out that she has a mass of dividing cells called a tumor in her ovaries. She has had tests and is returning to the doctor. Which of the following would be the best news that Rebecca could receive from her doctor?

Accepted Answer

A)   It is a benign tumor.
B)   The cells are cancerous and are in situ.
C)   It is a malignant tumor.
D)   It is malignant ovarian cancer.
E)   The tumor has metastasized and invaded neighboring tissue.F) A) and B)
G) A) and C)

Exam 8: Cellular Reproduction

Cells that do not receive the correct signals to move from G1 into S phase will enter G0 and therefore will

Correct AnswerverifiedShow Answer

How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G1 of the cell cycle?

Correct AnswerverifiedShow Answer

A mutation that causes an increase in function in a tumor suppressor gene would not likely cause cancer because a tumor suppressor protein

Correct AnswerverifiedShow Answer

Stem cells that contain telomerase can be found in adults.

Correct AnswerverifiedShow Answer

Which of the following organelles would be abundant and in close proximity to the cell plate in a plant cell undergoing cytokinesis?

Correct AnswerverifiedShow Answer

Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?

Correct AnswerverifiedShow Answer

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

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

A positive genetic test for telomerase indicates that

Correct AnswerverifiedShow Answer

Multicellular organisms undergo mitotic cell division to

Correct AnswerverifiedShow Answer

DNA and histones form bead-like globules known as

Correct AnswerverifiedShow Answer

Rebecca found out that she has a mass of dividing cells called a tumor in her ovaries. She has had tests and is returning to the doctor. Which of the following would be the best news that Rebecca could receive from her doctor?

Correct AnswerverifiedShow Answer

The figure below shows a cell in the mitotic stage of

Correct AnswerverifiedShow Answer

Cancer will occur if one copy of a mutant tumor suppressor gene is inherited.

Correct AnswerverifiedShow Answer

If there are 20 centromeres in a cell, how many chromosomes are there?

Correct AnswerverifiedShow Answer

Apoptosis

Correct AnswerverifiedShow Answer

Ben was looking at onion root tip cells under the microscope in biology class. He saw one cell that had two nuclei within it. What stage of the cell cycle was this cell in?

Correct AnswerverifiedShow Answer

A proto-oncogene differs from a tumor suppressor gene because a proto-oncogene

Correct AnswerverifiedShow Answer

All of the following statements are true about mitosis except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cells that do not receive the correct signals to move from G₁ into S phase will enter G₀ and therefore will

Correct Answer
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How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G₁ of the cell cycle?

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