Question 1

The chromatin _______ during prophase.

Accepted Answer

The answer of The chromatin _______ during prophase....

Question 2

A mechanism for increasing the genetic diversity of offspring is

Accepted Answer

A)  mitosis. 
B)  cloning. 
C)  sexual reproduction. 
D)  cytokinesis. 
E)  fission. 
A)  mitosis. 
B)  cloning. 
C)  sexual reproduction. 
D)  cytokinesis. 
E)  fission.

Question 3

Which statement about asexual reproduction is true?

Accepted Answer

A)  It generates much genetic variability. 
B)  It involves the production of clones. 
C)  It requires the production of gametes. 
D)  Only single-celled organisms reproduce asexually. 
E)  Both b and c 
A)  It generates much genetic variability. 
B)  It involves the production of clones. 
C)  It requires the production of gametes. 
D)  Only single-celled organisms reproduce asexually. 
E)  Both b and c

Question 4

The "invisible thread" that pinches animal cells apart during cell division is made of actin and _______.

Accepted Answer

The answer of The "invisible thread" that pinches animal cells...

Question 5

Pairing of homologous chromosomes occurs

Accepted Answer

A)  in mitosis. 
B)  in meiosis I only. 
C)  in meiosis II only. 
D)  in both meiosis I and meiosis II. 
E)  at no time. 
A)  in mitosis. 
B)  in meiosis I only. 
C)  in meiosis II only. 
D)  in both meiosis I and meiosis II. 
E)  at no time.

Question 6

The mitotic spindle is composed of

Accepted Answer

A)  chromosomes. 
B)  chromatids. 
C)  microtubules. 
D)  chromatin. 
E)  centrosomes. 
A)  chromosomes. 
B)  chromatids. 
C)  microtubules. 
D)  chromatin. 
E)  centrosomes.

Question 7

Refer to the figure showing a cell during meiosis.   The phase this cell is in is most likely _______.

Accepted Answer

The answer of Refer to the figure showing a cell...

Question 8

Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle.   At which phase does the cyclin-Cdk complex regulate the repair of incomplete DNA replication?

Accepted Answer

The answer of Refer to the figure showing cyclin-dependent kinases...

Question 9

Which change could potentially disrupt the process of cytokinesis in a dividing cell?

Accepted Answer

A)  A mutation in the S cyclin-Cdk complex 
B)  A mutation in the gene that encodes actin 
C)  A mutation in the G2-M cyclin-Cdk complex 
D)  A mutation in the histone protein 
E)  All of the above 
A)  A mutation in the S cyclin-Cdk complex 
B)  A mutation in the gene that encodes actin 
C)  A mutation in the G2-M cyclin-Cdk complex 
D)  A mutation in the histone protein 
E)  All of the above

Question 10

A haploid cell is a cell

Accepted Answer

A)  in which the genes are arranged haphazardly. 
B)  containing only one copy of each chromosome. 
C)  that has resulted from the process of mitosis. 
D)  with twice as many chromosomes as a diploid cell. 
E)  None of the above 
A)  in which the genes are arranged haphazardly. 
B)  containing only one copy of each chromosome. 
C)  that has resulted from the process of mitosis. 
D)  with twice as many chromosomes as a diploid cell. 
E)  None of the above

Question 11

If the rate of cell division is 6r per hour and the rate of apoptosis is 4r per hour (where r is a constant), then the rate of growth of the cell population is _______ per hour.

Accepted Answer

A)  -4r 
B)  -2r 
C)  2r 
D)  6r 
E)  10r 
A)  -4r 
B)  -2r 
C)  2r 
D)  6r 
E)  10r

Question 12

In most sexually reproducing organisms, the diploid phase of the life cycle begins at

Accepted Answer

A)  spore formation. 
B)  gamete formation. 
C)  meiosis. 
D)  mitosis. 
E)  fertilization. 
A)  spore formation. 
B)  gamete formation. 
C)  meiosis. 
D)  mitosis. 
E)  fertilization.

Question 13

As a result of fertilization, the number of chromosomes in the zygote _______ in comparison to the number of chromosomes in each of the gametes.

Accepted Answer

A)  doubles 
B)  is reduced by a factor of two 
C)  is reduced by a factor of three 
D)  doubles in plants but stays the same in animals 
E)  doubles in animals but stays the same in plants 
A)  doubles 
B)  is reduced by a factor of two 
C)  is reduced by a factor of three 
D)  doubles in plants but stays the same in animals 
E)  doubles in animals but stays the same in plants

Question 14

If the haploid chromosome number is 29, then triploids would have _______ chromosomes.

Accepted Answer

A)  30 
B)  58 
C)  59 
D)  87 
E)  88 
A)  30 
B)  58 
C)  59 
D)  87 
E)  88

Question 15

A cell in G2 has 4.8 pg of DNA.In G1, this cell had _______ pg of DNA.

Accepted Answer

A)  0.5 
B)  1.2 
C)  2.4 
D)  4.8 
E)  7.2 
A)  0.5 
B)  1.2 
C)  2.4 
D)  4.8 
E)  7.2

Question 16

Which situation is not involved in the separation of paired chromatids and their movement to opposite poles?

Accepted Answer

A)  Sister chromatids attach to microtubules in opposite halves of the spindle. 
B)  Separase hydrolyzes cohesion, allowing chromatid separation. 
C)  Tubulin fibers move the chromatids away from the equatorial plate. 
D)  Polar microtubules push the chromatids to the poles. 
E)  ATP is hydrolyzed by cytoplasmic dynein. 
A)  Sister chromatids attach to microtubules in opposite halves of the spindle. 
B)  Separase hydrolyzes cohesion, allowing chromatid separation. 
C)  Tubulin fibers move the chromatids away from the equatorial plate. 
D)  Polar microtubules push the chromatids to the poles. 
E)  ATP is hydrolyzed by cytoplasmic dynein.

Question 17

The microtubules of the mitotic spindle attach to a specialized structure in the centromere region of each chromosome called the

Accepted Answer

A)  kinetochore. 
B)  nucleosome. 
C)  equatorial plate. 
D)  aster. 
E)  centrosome. 
A)  kinetochore. 
B)  nucleosome. 
C)  equatorial plate. 
D)  aster. 
E)  centrosome.

Question 18

A species of fish has a diploid chromosome number of 36.How many different types of gametes can be produced from meiosis in a diploid individual with just independent assortment (no crossing over)?

Accepted Answer

A)  218 
B)  236 
C)  272 
D)  182 
E)  362 
A)  218 
B)  236 
C)  272 
D)  182 
E)  362

Question 19

Refer to the figure of two sexual life cycles.   Bald eagles reproduce through which cycle? Is a fertilized bird egg 1n or 2n? Which stage(s) of the life cycle is/are represented within the eggshell?

Accepted Answer

Bald eagles have a diplontic l

Question 20

In mitotic metaphase, there are 12 sister chromatids in a cell.Thus, there would be _______ centromeres in the cell.

Accepted Answer

The answer of In mitotic metaphase, there are 12 sister...

Exam 11: The Cell Cycle and Cell Division

The chromatin _______ during prophase.

A mechanism for increasing the genetic diversity of offspring is

Which statement about asexual reproduction is true?

The "invisible thread" that pinches animal cells apart during cell division is made of actin and _______.

Pairing of homologous chromosomes occurs

The mitotic spindle is composed of

Refer to the figure showing a cell during meiosis. The phase this cell is in is most likely _______.

Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle. At which phase does the cyclin-Cdk complex regulate the repair of incomplete DNA replication?

Which change could potentially disrupt the process of cytokinesis in a dividing cell?

A haploid cell is a cell

If the rate of cell division is 6r per hour and the rate of apoptosis is 4r per hour (where r is a constant), then the rate of growth of the cell population is _______ per hour.

In most sexually reproducing organisms, the diploid phase of the life cycle begins at

As a result of fertilization, the number of chromosomes in the zygote _______ in comparison to the number of chromosomes in each of the gametes.

If the haploid chromosome number is 29, then triploids would have _______ chromosomes.

A cell in G2 has 4.8 pg of DNA.In G1, this cell had _______ pg of DNA.

Which situation is not involved in the separation of paired chromatids and their movement to opposite poles?

The microtubules of the mitotic spindle attach to a specialized structure in the centromere region of each chromosome called the

A species of fish has a diploid chromosome number of 36.How many different types of gametes can be produced from meiosis in a diploid individual with just independent assortment (no crossing over)?

Refer to the figure of two sexual life cycles. Bald eagles reproduce through which cycle? Is a fertilized bird egg 1n or 2n? Which stage(s) of the life cycle is/are represented within the eggshell?

In mitotic metaphase, there are 12 sister chromatids in a cell.Thus, there would be _______ centromeres in the cell.

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

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