Question 1

At the end of the first meiotic division, each chromosome consists of

Accepted Answer

A)  chiasmata. 
B)  a homologous chromosome pair. 
C)  four copies of each DNA molecule. 
D)  two chromatids. 
E)  a pair of polar microtubules. 
A)  chiasmata. 
B)  a homologous chromosome pair. 
C)  four copies of each DNA molecule. 
D)  two chromatids. 
E)  a pair of polar microtubules. D

Question 2

Paclitaxel

Accepted Answer

A)  is an oncogene. 
B)  prevents the functioning of microtubules in a cell. 
C)  is a Cdk. 
D)  acts as a negative regulator. 
E)  produces a protein called E7. 
A)  is an oncogene. 
B)  prevents the functioning of microtubules in a cell. 
C)  is a Cdk. 
D)  acts as a negative regulator. 
E)  produces a protein called E7. B

Question 3

Caspases play a role in the process of

Accepted Answer

A)  autopolyploidy. 
B)  allopolyploidy. 
C)  aneuploidy. 
D)  necrosis. 
E)  apoptosis. 
A)  autopolyploidy. 
B)  allopolyploidy. 
C)  aneuploidy. 
D)  necrosis. 
E)  apoptosis. E

Question 4

In the sexual life cycle called alternation of generations, an organism spends roughly equal amounts of time in the _______ and the _______ stages.

Accepted Answer

A)  monosomic; trisomic 
B)  haploid; monosomic 
C)  haploid; diploid 
D)  prokaryotic; eukaryotic 
E)  haplontic; diplontic 
A)  monosomic; trisomic 
B)  haploid; monosomic 
C)  haploid; diploid 
D)  prokaryotic; eukaryotic 
E)  haplontic; diplontic

Question 5

Refer to the figure showing a phase of mitosis.   What phase is shown here?

Accepted Answer

A)  Mitosis prophase 
B)  Mitosis metaphase 
C)  Mitosis anaphase 
D)  Meiosis prophase I 
E)  Meiosis prophase II 
A)  Mitosis prophase 
B)  Mitosis metaphase 
C)  Mitosis anaphase 
D)  Meiosis prophase I 
E)  Meiosis prophase II

Question 6

At the milestone that defines anaphase, the chromosomes

Accepted Answer

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

Question 7

DNA is _______ charged; thus, _______ amino acids in histones make histones more likely to bind DNA.

Accepted Answer

A)  positively; positively charged 
B)  positively; neutral 
C)  positively; negatively charged 
D)  negatively; positively charged 
E)  negatively; negatively charged 
A)  positively; positively charged 
B)  positively; neutral 
C)  positively; negatively charged 
D)  negatively; positively charged 
E)  negatively; negatively charged

Question 8

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

Accepted Answer

A)  homologous pairing. 
B)  meiosis and fertilization. 
C)  mitosis and cytokinesis. 
D)  karyotyping. 
E)  crossing over. 
A)  homologous pairing. 
B)  meiosis and fertilization. 
C)  mitosis and cytokinesis. 
D)  karyotyping. 
E)  crossing over.

Question 9

Refer to the figure showing two sexual life cycles.   Which sexual life cycle type is not illustrated, and what is an example of that type of organism?

Accepted Answer

A)  Haplontic; Rhizopus fungus 
B)  Haplontic; a sheep 
C)  Diplontic; a sheep 
D)  Alternation of generations; a fern 
E)  Alternation of generations; Rhizopus fungus 
A)  Haplontic; Rhizopus fungus 
B)  Haplontic; a sheep 
C)  Diplontic; a sheep 
D)  Alternation of generations; a fern 
E)  Alternation of generations; Rhizopus fungus

Question 10

If a mutation renders a cyclin-Cdk more likely to phosphorylate RB, the result will be _______ (more/fewer) active RB molecules and more cells going through the checkpoint.

Accepted Answer

The answer of If a mutation renders a cyclin-Cdk more...

Question 11

Which statement about necrosis is true?

Accepted Answer

A)  It requires ATP. 
B)  It does not cause inflammation. 
C)  It may occur when cells are damaged by toxins. 
D)  It produces nucleosome-sized pieces of chromatin. 
E)  It results in fragmentation of the cell. 
A)  It requires ATP. 
B)  It does not cause inflammation. 
C)  It may occur when cells are damaged by toxins. 
D)  It produces nucleosome-sized pieces of chromatin. 
E)  It results in fragmentation of the cell.

Question 12

High-energy radiation is often used to treat cancer.The radiation damages the cancerous cells, and the cell cycle checkpoint for DNA repair is overwhelmed.Radiation therefore

Accepted Answer

A)  causes apoptosis when cells are at the S and G2 checkpoints. 
B)  inhibits the growth factor at the restriction point. 
C)  blocks DNA replication. 
D)  causes apoptosis only at the tumor site. 
E)  kills all tumor cells without harming healthy cells. 
A)  causes apoptosis when cells are at the S and G2 checkpoints. 
B)  inhibits the growth factor at the restriction point. 
C)  blocks DNA replication. 
D)  causes apoptosis only at the tumor site. 
E)  kills all tumor cells without harming healthy cells.

Question 13

The number of chromosomes in a cell is reduced to half during

Accepted Answer

A)  interphase. 
B)  meiosis I. 
C)  meiosis II. 
D)  fertilization. 
E)  mitosis. 
A)  interphase. 
B)  meiosis I. 
C)  meiosis II. 
D)  fertilization. 
E)  mitosis.

Question 14

A cell in G2 has 0.8 pg of DNA.How much DNA did that cell have in G1?

Accepted Answer

A)  0.4 pg 
B)  0.8 pg 
C)  1.6 pg 
D)  1.6 pg in animals, but 3.2 pg in plants 
E)  1.6 pg in plants, but 3.2 pg in animals 
A)  0.4 pg 
B)  0.8 pg 
C)  1.6 pg 
D)  1.6 pg in animals, but 3.2 pg in plants 
E)  1.6 pg in plants, but 3.2 pg in animals

Question 15

Which phase of the cell cycle is not part of interphase?

Accepted Answer

A)  S 
B)  G0 
C)  G1 
D)  G2 
E)  M 
A)  S 
B)  G0 
C)  G1 
D)  G2 
E)  M

Question 16

Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle.   At what point is the commitment made to another cell cycle?

Accepted Answer

Late in G1

Question 17

A mutation in _______ can lead to aneuploidy.

Accepted Answer

A)  a cyclin 
B)  a Cdk 
C)  cohesin 
D)  caspases 
E)  chromosome 21 
A)  a cyclin 
B)  a Cdk 
C)  cohesin 
D)  caspases 
E)  chromosome 21

Question 18

Refer to the figure showing the artificial selection of wheat.   According to the figure, what is the ploidy level of the most modern form of wheat?

Accepted Answer

A)  1n 
B)  2n 
C)  3n 
D)  4n 
E)  6n 
A)  1n 
B)  2n 
C)  3n 
D)  4n 
E)  6n

Question 19

If n = 30 for a species of beetles, then a diploid cell would have a total of _______ chromosomes.

Accepted Answer

A)  1 
B)  15 
C)  30 
D)  60 
E)  90 
A)  1 
B)  15 
C)  30 
D)  60 
E)  90

Question 20

In general, the division of the cell, which is called _______, follows immediately after mitosis.

Accepted Answer

The answer of In general, the division of the cell,...

Exam 11: The Cell Cycle and Cell Division

At the end of the first meiotic division, each chromosome consists of

Paclitaxel

Caspases play a role in the process of

In the sexual life cycle called alternation of generations, an organism spends roughly equal amounts of time in the _______ and the _______ stages.

Refer to the figure showing a phase of mitosis. What phase is shown here?

At the milestone that defines anaphase, the chromosomes

DNA is _______ charged; thus, _______ amino acids in histones make histones more likely to bind DNA.

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

Refer to the figure showing two sexual life cycles. Which sexual life cycle type is not illustrated, and what is an example of that type of organism?

If a mutation renders a cyclin-Cdk more likely to phosphorylate RB, the result will be _______ (more/fewer) active RB molecules and more cells going through the checkpoint.

Which statement about necrosis is true?

High-energy radiation is often used to treat cancer.The radiation damages the cancerous cells, and the cell cycle checkpoint for DNA repair is overwhelmed.Radiation therefore

The number of chromosomes in a cell is reduced to half during

A cell in G2 has 0.8 pg of DNA.How much DNA did that cell have in G1?

Which phase of the cell cycle is not part of interphase?

Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle. At what point is the commitment made to another cell cycle?

A mutation in _______ can lead to aneuploidy.

Refer to the figure showing the artificial selection of wheat. According to the figure, what is the ploidy level of the most modern form of wheat?

If n = 30 for a species of beetles, then a diploid cell would have a total of _______ chromosomes.

In general, the division of the cell, which is called _______, follows immediately after mitosis.

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

In the sexual life cycle called alternation of generations, an organism spends roughly equal amounts of time in the _ and the _ stages.

DNA is _ charged; thus, _ amino acids in histones make histones more likely to bind DNA.