Question 1

Besides the ability of some cancer cells to over proliferate, which of the following situations might logically result in a tumor?

Accepted Answer

A)  changes in the order of cell cycle stages 
B)  lack of appropriate cell death 
C)  inability to form spindles 
D)  failure of cells to enter S phase 
A)  changes in the order of cell cycle stages 
B)  lack of appropriate cell death 
C)  inability to form spindles 
D)  failure of cells to enter S phase

Question 2

How is plant cell cytokinesis different from animal cell cytokinesis?

Accepted Answer

A)  The contractile filaments found in plant cells are structures composed of carbohydrates; the cleavage furrow in animal cells is composed of contractile proteins. 
B)  Plant cells deposit vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow. 
C)  The structural proteins of plant cells separate the two cells; in animal cells, a cell membrane separates the two daughter cells. 
D)  Plant cells divide after metaphase but before anaphase; animal cells divide after anaphase. 
A)  The contractile filaments found in plant cells are structures composed of carbohydrates; the cleavage furrow in animal cells is composed of contractile proteins. 
B)  Plant cells deposit vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow. 
C)  The structural proteins of plant cells separate the two cells; in animal cells, a cell membrane separates the two daughter cells. 
D)  Plant cells divide after metaphase but before anaphase; animal cells divide after anaphase.

Question 3

For a chemotherapeutic drug to be useful for treating cancer cells, which of the following characteristics is most desirable?

Accepted Answer

A)  It is safe enough to prevent all apoptosis. 
B)  It does not interfere with metabolically active cells. 
C)  It specifically inhibits cells entering G₀. 
D)  It specifically inhibits rapidly dividing cells. 
A)  It is safe enough to prevent all apoptosis. 
B)  It does not interfere with metabolically active cells. 
C)  It specifically inhibits cells entering G₀. 
D)  It specifically inhibits rapidly dividing cells.

Question 4

Motor proteins require which of the following structures or molecules to function in the movement of chromosomes toward the poles of the mitotic spindle?

Accepted Answer

A)  intact centromeres 
B)  a microtubule-organizing center 
C)  ATP as an energy source 
D)  intact cohesin 
A)  intact centromeres 
B)  a microtubule-organizing center 
C)  ATP as an energy source 
D)  intact cohesin

Question 5

Which of the following molecules triggers the cell's passage past the G₂ checkpoint into mitosis?

Accepted Answer

A)  PDGF 
B)  MPF 
C)  cyclin 
D)  Cdk 
A)  PDGF 
B)  MPF 
C)  cyclin 
D)  Cdk

Question 6

The decline of MPF activity at the end of mitosis is due to

Accepted Answer

A)  the destruction of the protein kinase Cdk. 
B)  decreased synthesis of Cdk. 
C)  the degradation of cyclin. 
D)  the accumulation of cyclin. 
A)  the destruction of the protein kinase Cdk. 
B)  decreased synthesis of Cdk. 
C)  the degradation of cyclin. 
D)  the accumulation of cyclin.

Exam 12: The Cell Cycle

Besides the ability of some cancer cells to over proliferate, which of the following situations might logically result in a tumor?

How is plant cell cytokinesis different from animal cell cytokinesis?

For a chemotherapeutic drug to be useful for treating cancer cells, which of the following characteristics is most desirable?

Motor proteins require which of the following structures or molecules to function in the movement of chromosomes toward the poles of the mitotic spindle?

Which of the following molecules triggers the cell's passage past the G₂ checkpoint into mitosis?

The decline of MPF activity at the end of mitosis is due to

Evolution, the Themes of Biology, and Scientific Inquiry

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Vascular Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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