Question 1

At the milestone that defines telophase,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 2

The process of programmed cell death is called

Accepted Answer

A)  necrosis. 
B)  lysis. 
C)  apoptosis. 
D)  cell displacement. 
E)  cellular suicide. 
A)  necrosis. 
B)  lysis. 
C)  apoptosis. 
D)  cell displacement. 
E)  cellular suicide.

Question 3

Each diploid cell of a human female contains how many of each type of chromosome?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  23 
E)  46 
A)  1 
B)  2 
C)  4 
D)  23 
E)  46

Question 4

Cells that do not divide are usually arrested in

Accepted Answer

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

Question 5

During prokaryotic cell division,duplicated chromosomes separate from each other and are distributed into the daughter cells by

Accepted Answer

A)  attaching themselves to microtubules. 
B)  a mitotic spindle. 
C)  repellent forces. 
D)  the attaching of adjacent regions of ori to a protein filament. 
E)  the attaching of ter to a protein filament. 
A)  attaching themselves to microtubules. 
B)  a mitotic spindle. 
C)  repellent forces. 
D)  the attaching of adjacent regions of ori to a protein filament. 
E)  the attaching of ter to a protein filament.

Question 6

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 7

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

Accepted Answer

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

Question 8

Cytokinesis occurs during

Accepted Answer

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

Question 9

In organisms that display alternation of generations,

Accepted Answer

A)  only gametes are haploid. 
B)  only zygotes are diploid. 
C)  gametophytes are haploid and zygotes are diploid. 
D)  only diploid stages are multicellular. 
E)  spores and zygotes are diploid. 
A)  only gametes are haploid. 
B)  only zygotes are diploid. 
C)  gametophytes are haploid and zygotes are diploid. 
D)  only diploid stages are multicellular. 
E)  spores and zygotes are diploid.

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 can result only from mitosis. 
D)  with twice the number of chromosomes of a diploid cell. 
E)  produced only by binary fission. 
A)  in which the genes are arranged haphazardly. 
B)  containing only one copy of each chromosome. 
C)  that can result only from mitosis. 
D)  with twice the number of chromosomes of a diploid cell. 
E)  produced only by binary fission.

Question 11

How does a nucleus in G2 differ from a nucleus in G1?

Accepted Answer

A)  The G2 nucleus has twice the amount of DNA as the G1 nucleus. 
B)  The nuclear envelope breaks down during G2 phase. 
C)  Inactive cells are arrested only in G2 phase. 
D)  During G2,the cell prepares for DNA synthesis. 
E)  The G1 nucleus has twice the amount of DNA as the G2 nucleus. 
A)  The G2 nucleus has twice the amount of DNA as the G1 nucleus. 
B)  The nuclear envelope breaks down during G2 phase. 
C)  Inactive cells are arrested only in G2 phase. 
D)  During G2,the cell prepares for DNA synthesis. 
E)  The G1 nucleus has twice the amount of DNA as the G2 nucleus.

Question 12

Centrosomes

Accepted Answer

A)  are constricted regions of phase chromosomes. 
B)  are part of cilia. 
C)  are the central region of the cell. 
D)  are the region where the membrane constricts during cytokinesis. 
E)  determine the plane of cell division. 
A)  are constricted regions of phase chromosomes. 
B)  are part of cilia. 
C)  are the central region of the cell. 
D)  are the region where the membrane constricts during cytokinesis. 
E)  determine the plane of cell division.

Question 13

Which event is not part of sexual reproduction?

Accepted Answer

A)  The segregation of homologous chromosomes during gamete formation 
B)  The fusion of sister chromatids during fertilization 
C)  The fusion of haploid cells to form a diploid zygote 
D)  The reduction in chromosome number during meiosis 
E)  The production of genetically distinct gametes during meiosis 
A)  The segregation of homologous chromosomes during gamete formation 
B)  The fusion of sister chromatids during fertilization 
C)  The fusion of haploid cells to form a diploid zygote 
D)  The reduction in chromosome number during meiosis 
E)  The production of genetically distinct gametes during meiosis

Question 14

The second meiotic division of meiosis

Accepted Answer

A)  returns the chromosome number to diploid before fertilization. 
B)  allows for crossing over and random distribution of chromosomes. 
C)  reduces cell size by dividing the cytoplasm in half. 
D)  prevents chromosome copies from doubling at each fertilization. 
E)  is a step required for fertilization to take place. 
A)  returns the chromosome number to diploid before fertilization. 
B)  allows for crossing over and random distribution of chromosomes. 
C)  reduces cell size by dividing the cytoplasm in half. 
D)  prevents chromosome copies from doubling at each fertilization. 
E)  is a step required for fertilization to take place.

Question 15

Chromosome number is reduced during meiosis because the process consists of

Accepted Answer

A)  two cell divisions without any chromosome replication. 
B)  a single cell division without any chromosome replication. 
C)  two cell divisions in which half of the chromosomes are destroyed. 
D)  two cell divisions and only a single round of chromosome replication. 
E)  four cell divisions with no chromosome replication. 
A)  two cell divisions without any chromosome replication. 
B)  a single cell division without any chromosome replication. 
C)  two cell divisions in which half of the chromosomes are destroyed. 
D)  two cell divisions and only a single round of chromosome replication. 
E)  four cell divisions with no chromosome replication.

Question 16

The DNA of a typical eukaryotic cell is

Accepted Answer

A)  linear. 
B)  single-stranded. 
C)  circular. 
D)  complex inverted. 
E)  conservative. 
A)  linear. 
B)  single-stranded. 
C)  circular. 
D)  complex inverted. 
E)  conservative.

Question 17

During bacterial cell division,the single cell is separated into two cells by

Accepted Answer

A)  centrosomes. 
B)  spindle fibers. 
C)  nucleosomes. 
D)  pinching of the plasma membrane. 
E)  aneuploidy. 
A)  centrosomes. 
B)  spindle fibers. 
C)  nucleosomes. 
D)  pinching of the plasma membrane. 
E)  aneuploidy.

Question 18

For a prokaryote cell to divide,which of the following must occur?

Accepted Answer

A)  DNA replication,segregation of DNA,and cytokinesis 
B)  DNA replication,crossing over,and segregation of DNA 
C)  DNA replication and segregation of DNA 
D)  Cell growth and cytokinesis 
E)  A reproductive signal,DNA replication,segregation,and cytokinesis 
A)  DNA replication,segregation of DNA,and cytokinesis 
B)  DNA replication,crossing over,and segregation of DNA 
C)  DNA replication and segregation of DNA 
D)  Cell growth and cytokinesis 
E)  A reproductive signal,DNA replication,segregation,and cytokinesis

Question 19

In a diploid organism,zygotes are

Accepted Answer

A)  haploid. 
B)  diploid. 
C)  animals. 
D)  clones. 
E)  gametes. 
A)  haploid. 
B)  diploid. 
C)  animals. 
D)  clones. 
E)  gametes.

Exam 7: The Cell Cycle and Cell Division

At the milestone that defines telophase,the chromosomes

The process of programmed cell death is called

Each diploid cell of a human female contains how many of each type of chromosome?

Cells that do not divide are usually arrested in

During prokaryotic cell division,duplicated chromosomes separate from each other and are distributed into the daughter cells by

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 molecules that make up a chromosome are _______ and _______.

Cytokinesis occurs during

In organisms that display alternation of generations,

A haploid cell is a cell

How does a nucleus in G2 differ from a nucleus in G1?

Centrosomes

Which event is not part of sexual reproduction?

The second meiotic division of meiosis

Chromosome number is reduced during meiosis because the process consists of

The DNA of a typical eukaryotic cell is

During bacterial cell division,the single cell is separated into two cells by

For a prokaryote cell to divide,which of the following must occur?

In a diploid organism,zygotes are

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

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