Question 1

Which event occurs in prophase II?

Accepted Answer

A)  disappearance of the spindle 
B)  condensation of the chromatin into chromosomes 
C)  formation of the chiasmata 
D)  crossing over occurs. 
E)  formation of the cleavage furrow 
A)  disappearance of the spindle 
B)  condensation of the chromatin into chromosomes 
C)  formation of the chiasmata 
D)  crossing over occurs. 
E)  formation of the cleavage furrow

Question 2

To prevent disastrous consequences, the eukaryotic cell cycle is controlled by:

Accepted Answer

A)  the mitochondria. 
B)  replication. 
C)  environmental signals. 
D)  a very detailed, rigid genetic program. 
E)  a series of cell cycle checkpoints. 
A)  the mitochondria. 
B)  replication. 
C)  environmental signals. 
D)  a very detailed, rigid genetic program. 
E)  a series of cell cycle checkpoints.

Question 3

Bacteria divide asexually by mitosis . 
__________________

Accepted Answer

A) True 
 B)False

Question 4

Figure 10-1   Which phase of cell division is depicted in the accompanying figure?

Accepted Answer

A)  prophase of mitosis 
B)  metaphase of mitosis 
C)  prophase I of meiosis 
D)  prophase II of meiosis 
E)  metaphase I of meiosis 
A)  prophase of mitosis 
B)  metaphase of mitosis 
C)  prophase I of meiosis 
D)  prophase II of meiosis 
E)  metaphase I of meiosis

Question 5

Enzymes required for DNA replication are synthesized during the G 1 phase. 
__________________

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is produced by meiosis?

Accepted Answer

A)  somatic cells 
B)  animal gametes 
C)  polyploid cells 
D)  diploid cells 
E)  zygotes 
A)  somatic cells 
B)  animal gametes 
C)  polyploid cells 
D)  diploid cells 
E)  zygotes

Question 7

During prophase, ____ is(are) compacted into visible chromosomes.

Accepted Answer

A)  chromatin 
B)  centrioles 
C)  centromeres 
D)  kinetochores 
E)  tetrads 
A)  chromatin 
B)  centrioles 
C)  centromeres 
D)  kinetochores 
E)  tetrads

Question 8

A cell in the G2 phase:

Accepted Answer

A)  has twice the amount of DNA present in a telophase nucleus. 
B)  has visibly distinct chromosomes. 
C)  lacks a visible nuclear membrane. 
D)  is in mitosis. 
E)  is in cytokinesis. 
A)  has twice the amount of DNA present in a telophase nucleus. 
B)  has visibly distinct chromosomes. 
C)  lacks a visible nuclear membrane. 
D)  is in mitosis. 
E)  is in cytokinesis.

Question 9

In unwound chromatin, nucleosomes are organized into large coiled loops held together by:

Accepted Answer

A)  histones. 
B)  centromeres. 
C)  kinetochore proteins. 
D)  scaffolding proteins. 
E)  condensins. 
A)  histones. 
B)  centromeres. 
C)  kinetochore proteins. 
D)  scaffolding proteins. 
E)  condensins.

Question 10

A nucleosome consists of DNA wrapped around scaffolding proteins. 
__________________

Accepted Answer

A) True 
 B)False

Question 11

Figure 10-1   In the accompanying figure, which combination of letters accurately represents two homologous chromosomes?

Accepted Answer

A)  A and B 
B)  A and C 
C)  A and D 
D)  B and F 
E)  D and E 
A)  A and B 
B)  A and C 
C)  A and D 
D)  B and F 
E)  D and E

Question 12

Gametophyte plants produce gametes using:

Accepted Answer

A)  mitosis. 
B)  meiosis. 
C)  fertilization. 
D)  polyploidy. 
E)  sporogenesis. 
A)  mitosis. 
B)  meiosis. 
C)  fertilization. 
D)  polyploidy. 
E)  sporogenesis.

Question 13

Nucleosomes are best described as:

Accepted Answer

A)  eukaryotic DNA associated with histone proteins. 
B)  prokaryotic DNA associated with nonhistone proteins. 
C)  eukaryotic DNA associated with nonhistone proteins. 
D)  prokaryotic DNA associated with histone proteins. 
E)  eukaryotic DNA associated with scaffolding proteins. 
A)  eukaryotic DNA associated with histone proteins. 
B)  prokaryotic DNA associated with nonhistone proteins. 
C)  eukaryotic DNA associated with nonhistone proteins. 
D)  prokaryotic DNA associated with histone proteins. 
E)  eukaryotic DNA associated with scaffolding proteins.

Question 14

Microtubules of the mitotic spindle attach directly to each chromosome at the centromere . 
__________________

Accepted Answer

A) True 
 B)False

Question 15

Indicate the ploidy of each of the following cells: 
A. plant spores 
B. sperm 
C. somatic cells 
D. cells of a flower petal

Accepted Answer

Concepts to Consider: Plant sp

Question 16

Eukaryotic chromosomes are composed of:

Accepted Answer

A)  proteins only. 
B)  chromatin. 
C)  DNA only. 
D)  circular chromatin. 
E)  karyotypes. 
A)  proteins only. 
B)  chromatin. 
C)  DNA only. 
D)  circular chromatin. 
E)  karyotypes.

Question 17

Figure 10-1   In the accompanying figure, which combination of letters accurately represents two sister chromatids?

Accepted Answer

A)  A and B 
B)  A and C 
C)  A and D 
D)  A and E 
E)  B and F 
A)  A and B 
B)  A and C 
C)  A and D 
D)  A and E 
E)  B and F

Question 18

The nuclear envelope fragments during the prometaphase stage. 
__________________

Accepted Answer

A) True 
 B)False

Question 19

____ contain identical DNA sequences and are held together by ____ during mitosis.

Accepted Answer

A)  Daughter chromosomes; hydrogen bonding 
B)  Daughter chromosomes; ionic bonding 
C)  Sister chromatids; spindle fibers 
D)  Sister chromosomes; histone proteins 
E)  Sister chromatids; cohesin proteins 
A)  Daughter chromosomes; hydrogen bonding 
B)  Daughter chromosomes; ionic bonding 
C)  Sister chromatids; spindle fibers 
D)  Sister chromosomes; histone proteins 
E)  Sister chromatids; cohesin proteins

Question 20

Why is it important for DNA to be copied before cell division?

Accepted Answer

A)  Genetic information must be transmitted to the daughter cells. 
B)  The daughter cells must be polyploid. 
C)  The nucleus does not contain enough room for extra DNA. 
D)  The daughter cells need extra copies of the genetic information present in the parent cell. 
E)  The daughter cells do not need proteins. 
A)  Genetic information must be transmitted to the daughter cells. 
B)  The daughter cells must be polyploid. 
C)  The nucleus does not contain enough room for extra DNA. 
D)  The daughter cells need extra copies of the genetic information present in the parent cell. 
E)  The daughter cells do not need proteins.

Exam 10: Chromosomes, Mitosis, and Meiosis

Which event occurs in prophase II?

To prevent disastrous consequences, the eukaryotic cell cycle is controlled by:

Bacteria divide asexually by mitosis . __________________

Figure 10-1 Which phase of cell division is depicted in the accompanying figure?

Enzymes required for DNA replication are synthesized during the G 1 phase. __________________

Which of the following is produced by meiosis?

During prophase, ____ is(are) compacted into visible chromosomes.

A cell in the G2 phase:

In unwound chromatin, nucleosomes are organized into large coiled loops held together by:

A nucleosome consists of DNA wrapped around scaffolding proteins. __________________

Figure 10-1 In the accompanying figure, which combination of letters accurately represents two homologous chromosomes?

Gametophyte plants produce gametes using:

Nucleosomes are best described as:

Microtubules of the mitotic spindle attach directly to each chromosome at the centromere . __________________

Indicate the ploidy of each of the following cells: A. plant spores B. sperm C. somatic cells D. cells of a flower petal

Eukaryotic chromosomes are composed of:

Figure 10-1 In the accompanying figure, which combination of letters accurately represents two sister chromatids?

The nuclear envelope fragments during the prometaphase stage. __________________

____ contain identical DNA sequences and are held together by ____ during mitosis.

Why is it important for DNA to be copied before cell division?

A View of Life

Atoms and Molecules the Chemical Basis of Life

The Chemistry of Life Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp Energy-Releasing Pathways

Photosynthesis Capturing Light Energy

The Basic Principles of Heredity

Dna the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure Growth and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function an Introduction

Protection Support and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

Enzymes required for DNA replication are synthesized during the G ₁ phase. __________________

A cell in the G₂ phase:

contain identical DNA sequences and are held together by during mitosis.