Question 1

A person who inherits an extra X chromosome will have

Accepted Answer

A)  Klinefelter syndrome. 
B)  Turner syndrome. 
C)  Down syndrome. 
D)  Polyploid syndrome. 
E)  Edward syndrome. 
A)  Klinefelter syndrome. 
B)  Turner syndrome. 
C)  Down syndrome. 
D)  Polyploid syndrome. 
E)  Edward syndrome. A

Question 2

Chromosomes are replicated during the ______ phase.

Accepted Answer

A)  G1 
B)  G2 
C)  S 
D)  M 
E)  meta- 
A)  G1 
B)  G2 
C)  S 
D)  M 
E)  meta- C

Question 3

The control of the cell cycle involves all of the following EXCEPT

Accepted Answer

A)  Proteins cyclins and cyclin-dependent kinases are responsible for advancing a cell through the phases. 
B)  G2 checkpoint which checks for DNA damage, determines if all of the DNA is replicated. 
C)  Metaphase checkpoint which determines if all chromosomes are attached to the spindle apparatus. 
D)  Cytokinesis which involves the formation of cleavage furrow to separate the cells. 
E)  The restriction point determines if conditions are favorable for cell division. 
A)  Proteins cyclins and cyclin-dependent kinases are responsible for advancing a cell through the phases. 
B)  G2 checkpoint which checks for DNA damage, determines if all of the DNA is replicated. 
C)  Metaphase checkpoint which determines if all chromosomes are attached to the spindle apparatus. 
D)  Cytokinesis which involves the formation of cleavage furrow to separate the cells. 
E)  The restriction point determines if conditions are favorable for cell division. D

Question 4

If two triploid species interbreed, the offspring will be

Accepted Answer

A)  allotriploid. 
B)  allotetraploid. 
C)  allohexaploid. 
D)  alloheptaploid. 
E)  allonanoploid. 
A)  allotriploid. 
B)  allotetraploid. 
C)  allohexaploid. 
D)  alloheptaploid. 
E)  allonanoploid.

Question 5

During metaphase,

Accepted Answer

A)  heterochromatin is converted to euchromatin. 
B)  chromosomes are about 30 nm wide. 
C)  chromosomes are much shorter than they were in interphase. 
D)  chromosomes undergo gene transcription. 
E)  the "beads on a string" structure is visible. 
A)  heterochromatin is converted to euchromatin. 
B)  chromosomes are about 30 nm wide. 
C)  chromosomes are much shorter than they were in interphase. 
D)  chromosomes undergo gene transcription. 
E)  the "beads on a string" structure is visible.

Question 6

Chromosomes inside the nucleus do not overlap with each other because

Accepted Answer

A)  chromosomes are repelled from each other by their negative charges. 
B)  they all have a specific chromosome territory that is determined by the nuclear matrix. 
C)  the histone tails of the nucleosomes are repelled from each other by their negative charges. 
D)  the chromosomes are highly compacted by the formation of radial loop domains. 
E)  localized regions of the chromosomes are heterochromatic. 
A)  chromosomes are repelled from each other by their negative charges. 
B)  they all have a specific chromosome territory that is determined by the nuclear matrix. 
C)  the histone tails of the nucleosomes are repelled from each other by their negative charges. 
D)  the chromosomes are highly compacted by the formation of radial loop domains. 
E)  localized regions of the chromosomes are heterochromatic.

Question 7

When a gamete that is lacking a sex chromosome due to nondisjunction has fused with a gamete carrying an X chromosome, this type of abnormality leads to the ________.

Accepted Answer

A)  Triple X syndrome 
B)  Down Syndrome 
C)  Edward Syndrome 
D)  the Turner syndrome 
E)  Klinefelter Syndrome 
A)  Triple X syndrome 
B)  Down Syndrome 
C)  Edward Syndrome 
D)  the Turner syndrome 
E)  Klinefelter Syndrome

Question 8

DNA associates very tightly with nucleosomes because

Accepted Answer

A)  DNA can form covalent bonds with histone proteins. 
B)  negative charges on DNA are attracted to positive charges of the histone proteins. 
C)  the histone tails wrap tightly around the DNA double helix. 
D)  the amino acids of histone proteins are largely acidic, while DNA molecules are basic. 
E)  histone H1 tightens the coils of DNA that are wrapped around the nucleosome. 
A)  DNA can form covalent bonds with histone proteins. 
B)  negative charges on DNA are attracted to positive charges of the histone proteins. 
C)  the histone tails wrap tightly around the DNA double helix. 
D)  the amino acids of histone proteins are largely acidic, while DNA molecules are basic. 
E)  histone H1 tightens the coils of DNA that are wrapped around the nucleosome.

Question 9

If a cell contains 20 units of DNA during G2, it will have 40 units of DNA during S.

Accepted Answer

A) True 
 B)False

Question 10

Horses and donkeys are closely related species that can interbreed. However, the offspring produced are usually sterile and cannot reproduce. What term would best describe the offspring from this mating?

Accepted Answer

A)  alloploid 
B)  euploid 
C)  trisomic 
D)  polyploid 
E)  monosomic 
A)  alloploid 
B)  euploid 
C)  trisomic 
D)  polyploid 
E)  monosomic

Exam 15: The Eukaryotic Cell Cycle, Mitosis, and Meiosis

A person who inherits an extra X chromosome will have

Chromosomes are replicated during the ______ phase.

The control of the cell cycle involves all of the following EXCEPT

If two triploid species interbreed, the offspring will be

During metaphase,

Chromosomes inside the nucleus do not overlap with each other because

When a gamete that is lacking a sex chromosome due to nondisjunction has fused with a gamete carrying an X chromosome, this type of abnormality leads to the ________.

DNA associates very tightly with nucleosomes because

If a cell contains 20 units of DNA during G2, it will have 40 units of DNA during S.

Horses and donkeys are closely related species that can interbreed. However, the offspring produced are usually sterile and cannot reproduce. What term would best describe the offspring from this mating?

An Introduction to Biology

The Chemical Basis of Life I: Atoms, Molecules, and Water

The Chemical Basis of Life II: Organic Molecules

General Features of Cells

Membrane Structure, Synthesis, and Transport

An Introduction to Energy, Enzymes, and Metabolism

Cellular Respiration, Fermentation, and Secondary Metabolism

Photosynthesis

Cell Communication

Multicellularity

Nucleic Acid Structure, DNA Replication, and Chromosome Structure

Gene Expression at the Molecular Level

Gene Regulation

Mutation, DNA Repair, and Cancer

Simple Patterns of Inheritance

Complex Patterns of Inheritance

Genetics of Viruses and Bacteria

Developmental Genetics

Genetic Technology

Genomes, Proteomes, and Bioinformatics

The Origin and History of Life

An Introduction to Evolution

Population Genetics

Origin of Species and Macroevolution

Taxonomy and Systematics

Bacteria and Archaea

Protists

Plants and the Conquest of Land

The Evolution and Diversity of Modern Gymnosperms and Angiosperms

Fungi

An Introduction to Animal Diversity

The Invertebrates

The Vertebrates

An Introduction to Flowering Plant Form and Function

Flowering Plants: Behavior

Flowering Plants: Nutrition

Flowering Plants: Transport

Flowering Plants: Reproduction

Introduction to Animal Form and Function

Neuroscience I: Cells of the Nervous System

Neuroscience Ii: Evolution and Function of the Brain and Nervous Systems

Neuroscience Iii: Sensory Systems

The Muscular-Skeletal System and Locomotion

Nutrition, Digestion, and Absorption

Control of Energy Balance, Metabolic Rate, and Body Temperature

Circulatory Systems

Respiratory Systems

Excretory Systems and Salt and Water Balance

Endocrine Systems

Animal Reproduction

Animal Development

Immune Systems

An Introduction to Ecology and Biomes

Behavioral Ecology

Population Ecology

Species Interactions

Community Ecology

Ecosystems Ecology

Biodiversity and Conservation Biology

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