Question 1

Mitotic prophase differs from prophase I of meiosis in that

Accepted Answer

A)  chromatin becomes supercoiled only in mitotic prophase. 
B)  the nuclear envelope disappears only in prophase I of meiosis. 
C)  synapsis occurs only in mitotic prophase. 
D)  the chromatids separate in mitotic prophase, not in prophase I of meiosis. 
E)  crossing over is characteristic of prophase I of meiosis but not of mitotic prophase. 
A)  chromatin becomes supercoiled only in mitotic prophase. 
B)  the nuclear envelope disappears only in prophase I of meiosis. 
C)  synapsis occurs only in mitotic prophase. 
D)  the chromatids separate in mitotic prophase, not in prophase I of meiosis. 
E)  crossing over is characteristic of prophase I of meiosis but not of mitotic prophase.

Question 2

A(n) _______ is one member of a pair of chromosomes that share the same overall genetic composition and sequence.

Accepted Answer

The answer of A(n) _______ is one member of a...

Question 3

A species of grass has a haploid number of 18.How many different types of gametes can be produced from meiosis in a diploid individual just with independent assortment (no crossing over)?

Accepted Answer

A)  182 
B)  362 
C)  218 
D)  2 × 1018 
E)  2 × 1036 
A)  182 
B)  362 
C)  218 
D)  2 × 1018 
E)  2 × 1036

Question 4

You want to design a new drug that will help with wound healing.A class of molecules you will most likely investigate is _______.

Accepted Answer

The answer of You want to design a new drug...

Question 5

Which statement about meiosis and mitosis is true?

Accepted Answer

A)  DNA replication occurs only in mitosis and not in meiosis. 
B)  DNA replication occurs only in meiosis and not in mitosis. 
C)  The products of meiosis can be different from one another, while the products of mitosis are all the same (except for rare mutations). 
D)  The products of mitosis can be different from one another, while the products of meiosis are all the same (except for rare mutations). 
E)  Mitosis and meiosis are the same process. 
A)  DNA replication occurs only in mitosis and not in meiosis. 
B)  DNA replication occurs only in meiosis and not in mitosis. 
C)  The products of meiosis can be different from one another, while the products of mitosis are all the same (except for rare mutations). 
D)  The products of mitosis can be different from one another, while the products of meiosis are all the same (except for rare mutations). 
E)  Mitosis and meiosis are the same process.

Question 6

Knowledge of the cell cycle has led to improved means of treating cancer.The drug 5-fluorouracil, which blocks the synthesis of thymine, inhibits the cell cycle during

Accepted Answer

A)  G1 phase. 
B)  G2 phase. 
C)  S phase. 
D)  prophase. 
E)  metaphase. 
A)  G1 phase. 
B)  G2 phase. 
C)  S phase. 
D)  prophase. 
E)  metaphase.

Question 7

Refer to the figure showing two cells.   The cell on the left is a healthy nondividing cell while the cell on the right is undergoing _______.

Accepted Answer

The answer of Refer to the figure showing two cells....

Question 8

Mutations in the hypothetical gene S67 can lead to cancer when these mutations reduce the expression of the gene.Thus, S67 is likely

Accepted Answer

A)  an oncogene. 
B)  a necrosis factor. 
C)  the result of aneuploidy. 
D)  a tumor suppressor. 
E)  a chiasma. 
A)  an oncogene. 
B)  a necrosis factor. 
C)  the result of aneuploidy. 
D)  a tumor suppressor. 
E)  a chiasma.

Question 9

Tumors

Accepted Answer

A)  are large masses of cells. 
B)  are always cancerous. 
C)  always resemble the tissues they come from. 
D)  always metastasize. 
E)  are always fatal. 
A)  are large masses of cells. 
B)  are always cancerous. 
C)  always resemble the tissues they come from. 
D)  always metastasize. 
E)  are always fatal.

Question 10

Which statement about cell division in prokaryotes and eukaryotes is true?

Accepted Answer

A)  In prokaryotes, all cells divide if conditions are favorable; in eukaryotes, only a few cells divide, and they do so according to a developmental program. 
B)  In eukaryotes, all cells divide if conditions are favorable; in prokaryotes, only a few cells divide, and they do so according to a developmental program. 
C)  The process of segregation is more complicated in prokaryotes than in eukaryotes. 
D)  Reproductive signals for initiation of cell division are intracellular for prokaryotes and extracellular for eukaryotes. 
E)  The process of cytokinesis is more complicated in prokaryotes than in eukaryotes. 
A)  In prokaryotes, all cells divide if conditions are favorable; in eukaryotes, only a few cells divide, and they do so according to a developmental program. 
B)  In eukaryotes, all cells divide if conditions are favorable; in prokaryotes, only a few cells divide, and they do so according to a developmental program. 
C)  The process of segregation is more complicated in prokaryotes than in eukaryotes. 
D)  Reproductive signals for initiation of cell division are intracellular for prokaryotes and extracellular for eukaryotes. 
E)  The process of cytokinesis is more complicated in prokaryotes than in eukaryotes.

Question 11

Sexual reproduction increases genetic variability through

Accepted Answer

A)  the exchange of genetic information between male and female gametes during meiosis I. 
B)  the random separation of homologous chromosomes. 
C)  the union of male and female gametes. 
D)  crossing over, independent assortment, and random fertilization. 
E)  random assortment of male and female chromosomes. 
A)  the exchange of genetic information between male and female gametes during meiosis I. 
B)  the random separation of homologous chromosomes. 
C)  the union of male and female gametes. 
D)  crossing over, independent assortment, and random fertilization. 
E)  random assortment of male and female chromosomes.

Question 12

Which characteristic is an indicator of programmed cell death?

Accepted Answer

A)  Fragmented chromatin 
B)  Swelling of the membrane 
C)  Cell lysis 
D)  Loss of transcription control 
E)  None of the above 
A)  Fragmented chromatin 
B)  Swelling of the membrane 
C)  Cell lysis 
D)  Loss of transcription control 
E)  None of the above

Question 13

In an organism in which the diploid number is 10, _______ different types of gametes can be produced by independent assortment alone.

Accepted Answer

The answer of In an organism in which the diploid...

Question 14

During prometaphase, each chromatid is held together by a(n) _______.

Accepted Answer

The answer of During prometaphase, each chromatid is held together...

Question 15

Refer to the figure showing the eukaryotic cell cycle.   At what point would you expect a cyclin-Cdk complex to regulate the repair of incomplete DNA replication?

Accepted Answer

A)  In G1 phase 
B)  In S phase 
C)  In G2 phase 
D)  In M phase 
E)  In either G2 or M phase 
A)  In G1 phase 
B)  In S phase 
C)  In G2 phase 
D)  In M phase 
E)  In either G2 or M phase

Question 16

Nucleosomes contain _______ and _______.

Accepted Answer

A)  centromeres; DNA 
B)  microtubules; condensins 
C)  kinetochores; centromeres 
D)  histones; DNA 
E)  polar microtubules; kinetochore microtubules 
A)  centromeres; DNA 
B)  microtubules; condensins 
C)  kinetochores; centromeres 
D)  histones; DNA 
E)  polar microtubules; kinetochore microtubules

Question 17

Exchange of genetic material between nonsister chromatids occurs during meiosis I at the _______.

Accepted Answer

The answer of Exchange of genetic material between nonsister chromatids...

Question 18

Which statement about mitosis is false?

Accepted Answer

A)  It involves the segregation of sister chromatids. 
B)  It occurs in eukaryotes. 
C)  It ensures that new cells have the same amount of DNA as the parental cell. 
D)  It ensures that new cells have the same type of DNA as the parental cell. 
E)  All of the above are true; none is false. 
A)  It involves the segregation of sister chromatids. 
B)  It occurs in eukaryotes. 
C)  It ensures that new cells have the same amount of DNA as the parental cell. 
D)  It ensures that new cells have the same type of DNA as the parental cell. 
E)  All of the above are true; none is false.

Question 19

The molecules that make up a chromosome are _______ and _______.

Accepted Answer

A)  DNA; RNA 
B)  DNA; proteins 
C)  proteins; lipids 
D)  nucleotides; nucleosides 
E)  proteins; phospholipids 
A)  DNA; RNA 
B)  DNA; proteins 
C)  proteins; lipids 
D)  nucleotides; nucleosides 
E)  proteins; phospholipids

Question 20

At the milestone that defines telophase, the chromosomes

Accepted Answer

A)  separate. 
B)  come together. 
C)  cross over. 
D)  line up. 
E)  are at opposite poles. 
A)  separate. 
B)  come together. 
C)  cross over. 
D)  line up. 
E)  are at opposite poles.

Exam 11: The Cell Cycle and Cell Division

Mitotic prophase differs from prophase I of meiosis in that

A(n) _______ is one member of a pair of chromosomes that share the same overall genetic composition and sequence.

A species of grass has a haploid number of 18.How many different types of gametes can be produced from meiosis in a diploid individual just with independent assortment (no crossing over)?

You want to design a new drug that will help with wound healing.A class of molecules you will most likely investigate is _______.

Which statement about meiosis and mitosis is true?

Knowledge of the cell cycle has led to improved means of treating cancer.The drug 5-fluorouracil, which blocks the synthesis of thymine, inhibits the cell cycle during

Refer to the figure showing two cells. The cell on the left is a healthy nondividing cell while the cell on the right is undergoing _______.

Mutations in the hypothetical gene S67 can lead to cancer when these mutations reduce the expression of the gene.Thus, S67 is likely

Tumors

Which statement about cell division in prokaryotes and eukaryotes is true?

Sexual reproduction increases genetic variability through

Which characteristic is an indicator of programmed cell death?

In an organism in which the diploid number is 10, _______ different types of gametes can be produced by independent assortment alone.

During prometaphase, each chromatid is held together by a(n) _______.

Refer to the figure showing the eukaryotic cell cycle. At what point would you expect a cyclin-Cdk complex to regulate the repair of incomplete DNA replication?

Nucleosomes contain _______ and _______.

Exchange of genetic material between nonsister chromatids occurs during meiosis I at the _______.

Which statement about mitosis is false?

The molecules that make up a chromosome are _______ and _______.

At the milestone that defines telophase, the chromosomes

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

Filters

Nucleosomes contain _ and _.

The molecules that make up a chromosome are _ and _.