Question 1

Explain how the non-kinetochore microtubules lead to the elongation of the cell during anaphase.

Accepted Answer

Two different mechanisms are responsible

Question 2

Humans (which have a chromosome number of 2 n =46) have 92 chromosomes during G2.

Accepted Answer

A) True 
 B)False

Question 3

Which sequence of the cell cycle is correct?

Accepted Answer

A)  prophase, metaphase, interphase, telophase, anaphase 
B)  prometaphase, anaphase, prophase, telophase, interphase, metaphase 
C)  anaphase, interphase, telophase, prometaphase, prophase, metaphase 
D)  interphase, prophase, prometaphase, metaphase, anaphase, telophase 
E)  interphase, metaphase, prometaphase, prophase, telophase, anaphase 
A)  prophase, metaphase, interphase, telophase, anaphase 
B)  prometaphase, anaphase, prophase, telophase, interphase, metaphase 
C)  anaphase, interphase, telophase, prometaphase, prophase, metaphase 
D)  interphase, prophase, prometaphase, metaphase, anaphase, telophase 
E)  interphase, metaphase, prometaphase, prophase, telophase, anaphase

Question 4

Once human nerve cells become mature, they normally exit the cell cycle and remain in ____.

Accepted Answer

A)  G0 
B)  G1 
C)  G2 
D)  S phase 
E)  prophase 
A)  G0 
B)  G1 
C)  G2 
D)  S phase 
E)  prophase

Question 5

What is the role of nonhistone proteins in the nucleus?

Accepted Answer

A)  to regulate nuclear envelope formation 
B)  to facilitate nuclear transportation 
C)  to provide additional chromosomal structure 
D)  to disassemble the nuclear envelope 
E)  to aid in microtubule formation during mitosis 
A)  to regulate nuclear envelope formation 
B)  to facilitate nuclear transportation 
C)  to provide additional chromosomal structure 
D)  to disassemble the nuclear envelope 
E)  to aid in microtubule formation during mitosis

Question 6

Which statement characterizes cancer cells?

Accepted Answer

A)  Mitosis in cancer cells is strictly regulated. 
B)  Cancer cells form tumors that adhere strongly to surrounding tissues. 
C)  Cancer cells display uncontrolled cell division. 
D)  Tumors formed by cancer cells remain encapsulated and only grow in one location. 
E)  Cancer cells behave like normal cells. 
A)  Mitosis in cancer cells is strictly regulated. 
B)  Cancer cells form tumors that adhere strongly to surrounding tissues. 
C)  Cancer cells display uncontrolled cell division. 
D)  Tumors formed by cancer cells remain encapsulated and only grow in one location. 
E)  Cancer cells behave like normal cells.

Question 7

Contact inhibition is best explained by which statement?

Accepted Answer

A)  Contact between neighboring cells triggers reactions leading to inhibition of mitosis. 
B)  As neighboring cells become more tightly packed together, their size is restricted and cytokinesis can no longer occur. 
C)  As cell number increases, the protein kinases they produce compete with neighboring cells, inhibiting mitosis. 
D)  As cell number increases, the level of waste products increases, consequently slowing metabolism leading to mitosis. 
E)  As cell number increases, size restrictions inhibit protein synthesis. 
A)  Contact between neighboring cells triggers reactions leading to inhibition of mitosis. 
B)  As neighboring cells become more tightly packed together, their size is restricted and cytokinesis can no longer occur. 
C)  As cell number increases, the protein kinases they produce compete with neighboring cells, inhibiting mitosis. 
D)  As cell number increases, the level of waste products increases, consequently slowing metabolism leading to mitosis. 
E)  As cell number increases, size restrictions inhibit protein synthesis.

Question 8

The microtubules of the mitotic spindle originate from the ____ in both plant and animal cells.

Accepted Answer

A)  microtubule organizing centers (MTOCs) 
B)  centromere 
C)  chromatid 
D)  centriole 
E)  centrosome 
A)  microtubule organizing centers (MTOCs) 
B)  centromere 
C)  chromatid 
D)  centriole 
E)  centrosome

Question 9

Match between columns
                        Premises: Cdk1 phosphorylates target proteins to overcome the checkpoint for this transition
the primary checkpoint influenced by extracellular signals
binding of S cyclin to Cdk2 activates target proteins to overcome the checkpoint for this transition.

Accepted Answer

The Answer of GS1U1B12S1U1B0/M checkpoint and GS1U1B11S1U1B0/S checkpoint and mitotic is...

Question 10

Addition of mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G2leads the cells to ____.

Accepted Answer

A)  stop dividing 
B)  enter prophase 
C)  undergo cytokinesis without mitosis 
D)  die 
E)  remain arrested in G2 
A)  stop dividing 
B)  enter prophase 
C)  undergo cytokinesis without mitosis 
D)  die 
E)  remain arrested in G2

Question 11

The cells produced by mitotic divisions are considered to be ____ the original cell.

Accepted Answer

A)  smaller versions of 
B)  genetically unique from 
C)  clones of 
D)  mutants of 
E)  plasmids of 
A)  smaller versions of 
B)  genetically unique from 
C)  clones of 
D)  mutants of 
E)  plasmids of

Question 12

The nucleosome core particle is made up of ____.

Accepted Answer

A)  two molecules each of H2A, H2B, H3, and H4 
B)  one molecule each of H2A, H2B, H3, and H4 
C)  two molecules each of H1, H2, H3, and H4 
D)  one molecule each of H1, H2, H3, and H4 
E)  six proteins 
A)  two molecules each of H2A, H2B, H3, and H4 
B)  one molecule each of H2A, H2B, H3, and H4 
C)  two molecules each of H1, H2, H3, and H4 
D)  one molecule each of H1, H2, H3, and H4 
E)  six proteins

Question 13

The mitotic spindle is primarily composed of ____.

Accepted Answer

A)  actin 
B)  intermediate filaments 
C)  microtubules 
D)  keratin 
E)  motor proteins 
A)  actin 
B)  intermediate filaments 
C)  microtubules 
D)  keratin 
E)  motor proteins

Question 14

Generally, which phase of the cell cycle varies the most in length?

Accepted Answer

A)  G1 
B)  S 
C)  G2 
D)  M 
E)  All phases are the same length among cells 
A)  G1 
B)  S 
C)  G2 
D)  M 
E)  All phases are the same length among cells

Question 15

Kinetochore microtubules extend between the spindle poles.

Accepted Answer

A) True 
 B)False

Question 16

Figure 10.1
-Answer the following questions using the accompanying figure.

Identify the stage of mitosis shown in panel D.

Accepted Answer

A)  interphase 
B)  prophase 
C)  metaphase 
D)  anaphase 
E)  telophase 
A)  interphase 
B)  prophase 
C)  metaphase 
D)  anaphase 
E)  telophase

Question 17

A cell is committed to progressing through the cell cycle through to mitosis once it transitions from ____.

Accepted Answer

A)  G2to prophase 
B)  G1to G0 
C)  G1to S 
D)  S to G2 
E)  telophase to cytokinesis 
A)  G2to prophase 
B)  G1to G0 
C)  G1to S 
D)  S to G2 
E)  telophase to cytokinesis

Question 18

Centriole replication occurs during ____.

Accepted Answer

A)  G1phase 
B)  S phase 
C)  G2phase 
D)  prophase 
E)  telophase 
A)  G1phase 
B)  S phase 
C)  G2phase 
D)  prophase 
E)  telophase

Question 19

The ____ genome was the first eukaryotic genome to be sequenced.

Accepted Answer

A)  Escherichia coli 
B)  Caenorhabditis elegans 
C)  Drosophila melanogaster 
D)  Saccharomyces cerevisiae 
E)  Schizosaccharomyces pombe 
A)  Escherichia coli 
B)  Caenorhabditis elegans 
C)  Drosophila melanogaster 
D)  Saccharomyces cerevisiae 
E)  Schizosaccharomyces pombe

Question 20

Research conducted by G.J. Gorbsky and colleagues suggests that during anaphase, chromosomes move as a consequence of ____.

Accepted Answer

A)  a combined action of actin and microtubules 
B)  the disassembly of kinetochore microtubules 
C)  the movement of kinetochore microtubules 
D)  constriction of the contractile protein actin 
E)  sliding over or along kinetochore microtubules 
A)  a combined action of actin and microtubules 
B)  the disassembly of kinetochore microtubules 
C)  the movement of kinetochore microtubules 
D)  constriction of the contractile protein actin 
E)  sliding over or along kinetochore microtubules

Exam 10: Cell Division and Mitosis

Explain how the non-kinetochore microtubules lead to the elongation of the cell during anaphase.

Humans (which have a chromosome number of 2 n =46) have 92 chromosomes during G2.

Which sequence of the cell cycle is correct?

Once human nerve cells become mature, they normally exit the cell cycle and remain in ____.

What is the role of nonhistone proteins in the nucleus?

Which statement characterizes cancer cells?

Contact inhibition is best explained by which statement?

The microtubules of the mitotic spindle originate from the ____ in both plant and animal cells.

Addition of mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G2leads the cells to ____.

The cells produced by mitotic divisions are considered to be ____ the original cell.

The nucleosome core particle is made up of ____.

The mitotic spindle is primarily composed of ____.

Generally, which phase of the cell cycle varies the most in length?

Kinetochore microtubules extend between the spindle poles.

Figure 10.1 -Answer the following questions using the accompanying figure. Identify the stage of mitosis shown in panel D.

A cell is committed to progressing through the cell cycle through to mitosis once it transitions from ____.

Centriole replication occurs during ____.

The ____ genome was the first eukaryotic genome to be sequenced.

Research conducted by G.J. Gorbsky and colleagues suggests that during anaphase, chromosomes move as a consequence of ____.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Humans (which have a chromosome number of 2 n =46) have 92 chromosomes during G₂.

Addition of mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G₂leads the cells to ____.