Question 1

A scientist who observes cancer cells under a microscope would likely see

Accepted Answer

A)  orderly rows of cells. 
B)  cells that are much smaller than normal cells. 
C)  large growths containing fluid. 
D)  disorganized cells. 
A)  orderly rows of cells. 
B)  cells that are much smaller than normal cells. 
C)  large growths containing fluid. 
D)  disorganized cells.

Question 2

In a certain species of animal, 33% of the bases in its DNA are A. What percent of the bases are C?

Accepted Answer

A)  8.5% 
B)  17% 
C)  33% 
D)  34% 
A)  8.5% 
B)  17% 
C)  33% 
D)  34%

Question 3

________ is the cause of about one-third of all cancer deaths.

Accepted Answer

A)  Smoking tobacco 
B)  Exposure to viruses 
C)  Exposure to ultraviolet light 
D)  Exposure to high-energy radiation 
A)  Smoking tobacco 
B)  Exposure to viruses 
C)  Exposure to ultraviolet light 
D)  Exposure to high-energy radiation

Question 4

Sister chromatids separate during

Accepted Answer

A)  meiosis I and meiosis II. 
B)  meiosis I and mitosis. 
C)  mitosis and cytokinesis. 
D)  meiosis II and mitosis. 
A)  meiosis I and meiosis II. 
B)  meiosis I and mitosis. 
C)  mitosis and cytokinesis. 
D)  meiosis II and mitosis.

Question 5

Radiation therapy works primarily by

Accepted Answer

A)  causing problems with microtubule formation, preventing chromosomes from aligning properly during mitosis. 
B)  causing tumor cells to stick together, making them easier to remove. 
C)  damaging DNA in cells so that cells can no longer grow and divide. 
D)  making cancer cells divide so fast that they may develop extra mutations and die. 
A)  causing problems with microtubule formation, preventing chromosomes from aligning properly during mitosis. 
B)  causing tumor cells to stick together, making them easier to remove. 
C)  damaging DNA in cells so that cells can no longer grow and divide. 
D)  making cancer cells divide so fast that they may develop extra mutations and die.

Question 6

A cell plate forms during which process?

Accepted Answer

A)  cytokinesis in an animal cell 
B)  cytokinesis in a plant cell 
C)  mitosis in an animal cell 
D)  mitosis in a plant cell 
A)  cytokinesis in an animal cell 
B)  cytokinesis in a plant cell 
C)  mitosis in an animal cell 
D)  mitosis in a plant cell

Question 7

-DNA polymerase moves along the length of the unwound helix, starting at the end of one strand and finishing at the end of the other strand. As shown in this figure, what is the result of this phenomenon?

Accepted Answer

A)  One resulting double strand of DNA is composed of new DNA, and one is composed of parental DNA. 
B)  Free nucleotides are added to one strand of parental DNA but not to the other. 
C)  The DNA polymerase moves toward the unwound helix on one strand of DNA and away from it on the other strand. 
D)  DNA polymerase is destroyed as it binds nucleotides to form each daughter strand. 
A)  One resulting double strand of DNA is composed of new DNA, and one is composed of parental DNA. 
B)  Free nucleotides are added to one strand of parental DNA but not to the other. 
C)  The DNA polymerase moves toward the unwound helix on one strand of DNA and away from it on the other strand. 
D)  DNA polymerase is destroyed as it binds nucleotides to form each daughter strand.

Question 8

During which phase of mitosis are the replicated chromosome aligned in the middle of the cell?

Accepted Answer

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

Question 9

Which of the following is not a known carcinogen?

Accepted Answer

A)  certain viruses 
B)  ultraviolet light 
C)  cigarette smoke 
D)  pet dander 
A)  certain viruses 
B)  ultraviolet light 
C)  cigarette smoke 
D)  pet dander

Question 10

Which of the following is the correct order of events in mitosis?

Accepted Answer

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

Question 11

Which of the following is a feature of DNA?

Accepted Answer

A)  Adenine (
A)  forms a base pair with cytosine (
C) . 
B)  The backbone of each strand is composed of alternating sugar and phosphate groups. 
C)  Complementary strands are held together by ionic bonds. 
D)  DNA remains condensed in a short linear form both before and after cell division. 
A)  Adenine (
A)  forms a base pair with cytosine (
C) . 
B)  The backbone of each strand is composed of alternating sugar and phosphate groups. 
C)  Complementary strands are held together by ionic bonds. 
D)  DNA remains condensed in a short linear form both before and after cell division.

Question 12

Crossing over occurs during

Accepted Answer

A)  anaphase I of meiosis I. 
B)  anaphase II of meiosis II. 
C)  prophase I of meiosis I. 
D)  prophase II of meiosis II. 
A)  anaphase I of meiosis I. 
B)  anaphase II of meiosis II. 
C)  prophase I of meiosis I. 
D)  prophase II of meiosis II.

Question 13

Most cells spend most of their time in which phase?

Accepted Answer

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

Question 14

A normal human cell containing 22 autosomes and a Y chromosome is a(n)

Accepted Answer

A)  egg cell. 
B)  somatic cell of a female. 
C)  somatic cell of a male. 
D)  sperm cell. 
A)  egg cell. 
B)  somatic cell of a female. 
C)  somatic cell of a male. 
D)  sperm cell.

Question 15

Which of these conditions is caused by nondisjunction of autosomal chromosomes?

Accepted Answer

A)  XO - Turner syndrome 
B)  Trisomy 21 - Down syndrome 
C)  XXY - Kleinfelter syndrome 
D)  Trisomy X - Meta female 
A)  XO - Turner syndrome 
B)  Trisomy 21 - Down syndrome 
C)  XXY - Kleinfelter syndrome 
D)  Trisomy X - Meta female

Question 16

The multiple-hit model of cancer means that

Accepted Answer

A)  most cancer-causing mutations are passed on to future generations. 
B)  most cancers occur in many different tissues simultaneously. 
C)  multiple mutations are required to cause most forms of cancer. 
D)  a person gets cancer only if both of his or her parents had cancer. 
A)  most cancer-causing mutations are passed on to future generations. 
B)  most cancers occur in many different tissues simultaneously. 
C)  multiple mutations are required to cause most forms of cancer. 
D)  a person gets cancer only if both of his or her parents had cancer.

Question 17

What are the two halves of a duplicated chromosome called?

Accepted Answer

A)  alleles 
B)  centromeres 
C)  homologous chromosomes 
D)  sister chromatids 
A)  alleles 
B)  centromeres 
C)  homologous chromosomes 
D)  sister chromatids

Question 18

During which phase of mitosis do sister chromatids separate to opposite poles of the cell?

Accepted Answer

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

Question 19

The term "semiconservative replication" refers to the fact that

Accepted Answer

A)  DNA is created from only four of nine available nucleotides. 
B)  the DNA molecule includes a parental strand and newly created DNA strand. 
C)  DNA is not just one strand but two complementary strands. 
D)  the mode of DNA replication is only tentatively described. 
A)  DNA is created from only four of nine available nucleotides. 
B)  the DNA molecule includes a parental strand and newly created DNA strand. 
C)  DNA is not just one strand but two complementary strands. 
D)  the mode of DNA replication is only tentatively described.

Question 20

________ are places in the cell cycle where proteins survey the cell to make sure that conditions for a favorable cell division have been met.

Accepted Answer

The answer of ________ are places in the cell cycle...

Exam 6: Cancer: DNA Synthesis, Mitosis, and Meiosis

A scientist who observes cancer cells under a microscope would likely see

In a certain species of animal, 33% of the bases in its DNA are A. What percent of the bases are C?

________ is the cause of about one-third of all cancer deaths.

Sister chromatids separate during

Radiation therapy works primarily by

A cell plate forms during which process?

-DNA polymerase moves along the length of the unwound helix, starting at the end of one strand and finishing at the end of the other strand. As shown in this figure, what is the result of this phenomenon?

During which phase of mitosis are the replicated chromosome aligned in the middle of the cell?

Which of the following is not a known carcinogen?

Which of the following is the correct order of events in mitosis?

Which of the following is a feature of DNA?

Crossing over occurs during

Most cells spend most of their time in which phase?

A normal human cell containing 22 autosomes and a Y chromosome is a(n)

Which of these conditions is caused by nondisjunction of autosomal chromosomes?

The multiple-hit model of cancer means that

What are the two halves of a duplicated chromosome called?

During which phase of mitosis do sister chromatids separate to opposite poles of the cell?

The term "semiconservative replication" refers to the fact that

________ are places in the cell cycle where proteins survey the cell to make sure that conditions for a favorable cell division have been met.

Can Science Cure the Common Cold? Introduction to the Scientific Method

Are We Alone in the Universe? Water, Biochemistry, and Cells

Is It Possible to Supplement Your Way to Better Health?

Fat: How Much is Right for You? Enzymes, Metabolism, and Cellular Respiration

Life in the Greenhouse: Photosynthesis and Global Warming

Are You Only as Smart as Your Genes? Mendelian and Quantitative Genetics

DNA Detective: Complex Patterns of Inheritance and DNA Fingerprinting

Genetically Modified Organisms: Gene Expression, Mutation, and Cloning

Where Did We Come From? The Evidence for Evolution

An Evolving Enemy: Natural Selection

Who Am I? Species and Races

Prospecting for Biological Gold: Biodiversity and Classification

Is the Human Population Too Large? Population Ecology

Conserving Biodiversity: Community and Ecosystem Ecology

Where Do You Live? Climate and Biomes

Organ Donation: Tissues Organs and Organ Systems

Clearing the Air: Respiratory Cardiovascular and Excretory Systems

Vaccinations: Protection and Prevention or Peril? Immune System

Sex Differences and Athleticism: Endocrine Skeletal and Muscular Systems

Is There Something in the Water? Reproductive and Developmental Biology

Attention Deficit Disorder: Brain Structure and Function

Feeding the World: Plant Structure and Growth

Growing a Green Thumb: Plant Physiology

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