Question 1

During prokaryotic cell division, two chromosomes separate and are distributed to the two ends of the cell by ____.

Accepted Answer

A)  the action of the mitotic spindle 
B)  an unknown mechanism 
C)  attachment to actin 
D)  attachment to separating membrane regions 
E)  formation of a newly made cell wall 
A)  the action of the mitotic spindle 
B)  an unknown mechanism 
C)  attachment to actin 
D)  attachment to separating membrane regions 
E)  formation of a newly made cell wall

Question 2

During ____, microtubules disassemble, pulling the chromatids to the ends of the spindle.

Accepted Answer

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

Question 3

If a given protein's level peaks early in G1, but is absent before the G2transition, what can be inferred about its possible role in regulating the cell cycle?

Accepted Answer

A)  This protein inhibits S-phase Cdks. 
B)  This protein activates S-phase Cdks. 
C)  This protein inhibits G1/S Cdks. 
D)  This protein activates G1/S Cdks. 
E)  This protein is involved in DNA synthesis. 
A)  This protein inhibits S-phase Cdks. 
B)  This protein activates S-phase Cdks. 
C)  This protein inhibits G1/S Cdks. 
D)  This protein activates G1/S Cdks. 
E)  This protein is involved in DNA synthesis.

Question 4

Bacterial DNA is not compacted into an organized higher structure.

Accepted Answer

A) True 
 B)False

Question 5

A somatic cell divides to form two genetically identical daughter cells during mitosis. Prior to mitosis, what must occur?

Accepted Answer

A)  The cell must replicate its DNA. 
B)  The cell must first be fertilized. 
C)  The nucleus must divide. 
D)  Chromatids must be separated. 
E)  The nuclear envelope must disintegrate. 
A)  The cell must replicate its DNA. 
B)  The cell must first be fertilized. 
C)  The nucleus must divide. 
D)  Chromatids must be separated. 
E)  The nuclear envelope must disintegrate.

Question 6

What are the two main features of prokaryotic binary fission?

Accepted Answer

Replication of the s

Question 7

Which external factors influence a cell to divide?

Accepted Answer

A variety of external chemical and physi

Question 8

Histones are positively charged proteins that complex with DNA in eukaryotic chromosomes.

Accepted Answer

A) True 
 B)False

Question 9

The evolution of binary fusion solved the mechanical problems associated with distributing long DNA molecules without breakage.

Accepted Answer

A) True 
 B)False

Question 10

If a dividing cell had no functional G1/S Cdk protein, the cell would not be able to ____.

Accepted Answer

A)  phosphorylate cyclins 
B)  transcribe the Cdk gene 
C)  enter S phase 
D)  translate cyclin mRNA 
E)  degrade cyclins 
A)  phosphorylate cyclins 
B)  transcribe the Cdk gene 
C)  enter S phase 
D)  translate cyclin mRNA 
E)  degrade cyclins

Question 11

Progression through the phases of the cell cycle is regulated by fluctuating concentrations of ____.

Accepted Answer

A)  microtubules 
B)  actin 
C)  cyclins 
D)  cyclin-dependent kinases 
E)  histones 
A)  microtubules 
B)  actin 
C)  cyclins 
D)  cyclin-dependent kinases 
E)  histones

Question 12

Replication of a bacterial chromosome begins at a specific region called the ____.

Accepted Answer

A)  ter 
B)  replication fork 
C)  beg 
D)  ori 
E)  rep 
A)  ter 
B)  replication fork 
C)  beg 
D)  ori 
E)  rep

Question 13

If a cell contains 84 sister chromatids at metaphase of mitosis, how many chromosomes will be present in each nucleus in late telophase?

Accepted Answer

A)  168 
B)  84 
C)  42 
D)  21 
E)  cannot be determined from the information given 
A)  168 
B)  84 
C)  42 
D)  21 
E)  cannot be determined from the information given

Question 14

Match between columns
                        Premises: sister chromatids are pulled to opposite spindle poles
mitotic spindle disassembles
chromosomes align at the center of the cell
daughter chromosomes decondense and the nuclear envelope reforms
spindle fiber begins to form
RNA synthesis shuts down
duplicated chromosomes condense
nuclear envelope disappears

Accepted Answer

The Answer of metaphase and prometaphase and anaphase and telophase is...

Question 15

What is the role of Cdks?

Accepted Answer

A)  to add phosphate groups to target proteins 
B)  to check for proper attachment of spindle fibers to chromosomes 
C)  to remove phosphate groups from cyclins 
D)  to arrest the cell cycle 
E)  to allow the cell cycle to work forward or backward 
A)  to add phosphate groups to target proteins 
B)  to check for proper attachment of spindle fibers to chromosomes 
C)  to remove phosphate groups from cyclins 
D)  to arrest the cell cycle 
E)  to allow the cell cycle to work forward or backward

Question 16

Some bacteria produce the enzyme β-lactamase, which results in resistance to certain antibiotics such as penicillin. Since these same organisms reproduce asexually, they produce offspring that ____.

Accepted Answer

A)  can be killed by penicillin 
B)  have an abnormally high rate of mutation 
C)  are resistant to penicillin 
D)  have variable numbers of chromosomes 
E)  can make penicillin 
A)  can be killed by penicillin 
B)  have an abnormally high rate of mutation 
C)  are resistant to penicillin 
D)  have variable numbers of chromosomes 
E)  can make penicillin

Question 17

Vinblastine, a chemotherapeutic drug used to treat breast and testicular cancers, interferes with the assembly of microtubules. Speculate how this drug works to inhibit cancer cell growth.

Accepted Answer

A)  Vinblastine inhibits transition from G1to S. 
B)  Vinblastine inhibits transition from S to G2. 
C)  Vinblastine inhibits cytokinesis. 
D)  Vinblastine disrupts mitotic spindle formation and consequently mitosis. 
E)  Vinblastine inhibits cyclin production. 
A)  Vinblastine inhibits transition from G1to S. 
B)  Vinblastine inhibits transition from S to G2. 
C)  Vinblastine inhibits cytokinesis. 
D)  Vinblastine disrupts mitotic spindle formation and consequently mitosis. 
E)  Vinblastine inhibits cyclin production.

Question 18

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

Identify the stage of mitosis shown in panel A.

Accepted Answer

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

Question 19

Comparison of a cancer cell to a normal cell reveals that ____.

Accepted Answer

A)  only cancer cell growth is limited by contact inhibition 
B)  only normal cell growth is limited by contact inhibition 
C)  cancer cells cannot metastasize, while normal cells can 
D)  regulation of mitosis is strictly regulated in cancer cells, but not in normal cells. 
E)  cancer cells remain adherent to other cells, while normal cells do not 
A)  only cancer cell growth is limited by contact inhibition 
B)  only normal cell growth is limited by contact inhibition 
C)  cancer cells cannot metastasize, while normal cells can 
D)  regulation of mitosis is strictly regulated in cancer cells, but not in normal cells. 
E)  cancer cells remain adherent to other cells, while normal cells do not

Question 20

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

Identify the stage of mitosis shown in panel C.

Accepted Answer

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

Exam 10: Cell Division and Mitosis

During prokaryotic cell division, two chromosomes separate and are distributed to the two ends of the cell by ____.

During ____, microtubules disassemble, pulling the chromatids to the ends of the spindle.

If a given protein's level peaks early in G1, but is absent before the G2transition, what can be inferred about its possible role in regulating the cell cycle?

Bacterial DNA is not compacted into an organized higher structure.

A somatic cell divides to form two genetically identical daughter cells during mitosis. Prior to mitosis, what must occur?

What are the two main features of prokaryotic binary fission?

Which external factors influence a cell to divide?

Histones are positively charged proteins that complex with DNA in eukaryotic chromosomes.

The evolution of binary fusion solved the mechanical problems associated with distributing long DNA molecules without breakage.

If a dividing cell had no functional G1/S Cdk protein, the cell would not be able to ____.

Progression through the phases of the cell cycle is regulated by fluctuating concentrations of ____.

Replication of a bacterial chromosome begins at a specific region called the ____.

If a cell contains 84 sister chromatids at metaphase of mitosis, how many chromosomes will be present in each nucleus in late telophase?

What is the role of Cdks?

Some bacteria produce the enzyme β-lactamase, which results in resistance to certain antibiotics such as penicillin. Since these same organisms reproduce asexually, they produce offspring that ____.

Vinblastine, a chemotherapeutic drug used to treat breast and testicular cancers, interferes with the assembly of microtubules. Speculate how this drug works to inhibit cancer cell growth.

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

Comparison of a cancer cell to a normal cell reveals that ____.

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

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

If a given protein's level peaks early in G₁, but is absent before the G₂transition, what can be inferred about its possible role in regulating the cell cycle?