Question 1

When is a cell committed to undergoing mitosis?

Accepted Answer

A) once it transitions from S to G2 
B) once it transitions from G1 to S 
C) once it transitions from G1 to G0 
D) once it transitions from G2 to prophase 
A) once it transitions from S to G2 
B) once it transitions from G1 to S 
C) once it transitions from G1 to G0 
D) once it transitions from G2 to prophase

Question 2

When does centriole replication occur in the cell cycle?

Accepted Answer

A) during S 
B) during G1 
C) during prophase 
D) during G2 
A) during S 
B) during G1 
C) during prophase 
D) during G2

Question 3

During which phase of the cell cycle is cyclin degraded, resulting in the transition to G1?

Accepted Answer

A) during interphase 
B) during metaphase 
C) during prophase 
D) during anaphase 
A) during interphase 
B) during metaphase 
C) during prophase 
D) during anaphase

Question 4

At the G2-to-M checkpoint, one of the cyclins has reached a concentration great enough to complex with one of the CDKs to initiate DNA synthesis. Which cyclin and which CDK are the ones involved?

Accepted Answer

A) cyclin M and CDK1 
B) cyclin S and CDK1 
C) cyclin M and CDK2 
D) cyclin S and CDK2 
A) cyclin M and CDK1 
B) cyclin S and CDK1 
C) cyclin M and CDK2 
D) cyclin S and CDK2

Question 5

How is cell division in plant cells different than cell division in animal cells?

Accepted Answer

1.Unlike animal cells, no centrosome or

Question 6

Why are cancer cell lines, rather than normal cells, frequently used to study biological processes?

Accepted Answer

Scientific researchers frequently prefer

Question 7

How is cytokinesis different in plant and animal cells?

Accepted Answer

A) It forms a cleavage furrow in animal cells, and a cell plate in plant cells. 
B) It helps create four daughter cells in animal cells, and two in plant cells. 
C) It forms a cleavage furrow in plant cells, and a cell plate in animal cells. 
D) It helps create two daughter cells in animal cells, and four in plant cells. 
A) It forms a cleavage furrow in animal cells, and a cell plate in plant cells. 
B) It helps create four daughter cells in animal cells, and two in plant cells. 
C) It forms a cleavage furrow in plant cells, and a cell plate in animal cells. 
D) It helps create two daughter cells in animal cells, and four in plant cells.

Question 8

For each phrase, choose the most appropriate component of cell cycle regulation. Each component may be used once, more than once, or not at all.
-regulates cell division

Accepted Answer

A) CDK 
B) cyclins 
C) CDK/cyclin complex 
D) SPF 
A) CDK 
B) cyclins 
C) CDK/cyclin complex 
D) SPF

Question 9

In which type of cell do duplicated centrioles move to opposite poles, and during which part of the cell cycle does this occur?

Accepted Answer

A) in a plant cell, during prophase 
B) in an animal cell, during prophase 
C) in a plant cell, during metaphase 
D) in an animal cell, during metaphase 
A) in a plant cell, during prophase 
B) in an animal cell, during prophase 
C) in a plant cell, during metaphase 
D) in an animal cell, during metaphase

Question 10

How does the speed of division in normal cells and blastema cells differ?

Accepted Answer

A) Blastema cells divide 50 times faster than normal cells. 
B) Blastema cells divide 40 times faster than normal cells. 
C) Blastema cells divide 20 times faster than normal cells. 
D) Blastema cells divide at the same speed as normal cells. 
A) Blastema cells divide 50 times faster than normal cells. 
B) Blastema cells divide 40 times faster than normal cells. 
C) Blastema cells divide 20 times faster than normal cells. 
D) Blastema cells divide at the same speed as normal cells.

Question 11

Which of the following is an activity included in the stages of cytoplasmic division?

Accepted Answer

A) cytokinesis 
B) condensation of DNA into chromosomes 
C) separation of sister chromatids in the cytoplasm 
D) movement of chromosomes into alignment on the metaphase plate 
A) cytokinesis 
B) condensation of DNA into chromosomes 
C) separation of sister chromatids in the cytoplasm 
D) movement of chromosomes into alignment on the metaphase plate

Question 12

Which term refers to duplication of the complete set of chromosomes in an organism's cell, followed by the separation of the duplicated chromosomes into two new cells?

Accepted Answer

A) zygote formation 
B) mitotic cell division 
C) binary fission 
D) meiotic cell division 
A) zygote formation 
B) mitotic cell division 
C) binary fission 
D) meiotic cell division

Question 13

What external factors influence a cell to divide?

Accepted Answer

A variety of external chemical and physi

Question 14

How are the two chromosomes separated and distributed to the two ends of the cell during prokaryotic cell division?

Accepted Answer

A) by an unknown mechanism 
B) by attachment to separating membrane regions 
C) by attachment to actin 
D) by the action of the mitotic spindle 
A) by an unknown mechanism 
B) by attachment to separating membrane regions 
C) by attachment to actin 
D) by the action of the mitotic spindle

Question 15

Identify the stage of mitosis in which each activity occurs.
-Duplicated chromosomes condense into chromosomes.

Accepted Answer

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

Question 16

Embryonic development begins with a single egg being fertilized by a single sperm, thus forming a zygote; the zygote then undergoes mitosis. How many cells would be present at the conclusion of four mitotic divisions?
a.16
b.8
c.4
d.2

Accepted Answer

The answer of Embryonic development begins with a single egg...

Question 17

Photomicrograph by Dr. Conly L. Rieder, East Greenbush, New York
-Which stage of mitosis is shown in photo D in the figure?

Accepted Answer

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

Question 18

What is the primary function of centrioles in animal cells?

Accepted Answer

A) to provide a point of attachment for spindle fibres on chromosomes 
B) to connect the two sister chromatids 
C) spindle formation 
D) the generation of flagella and cilia 
A) to provide a point of attachment for spindle fibres on chromosomes 
B) to connect the two sister chromatids 
C) spindle formation 
D) the generation of flagella and cilia

Question 19

The microtubules that make up the mitotic spindle attach themselves to special structures that are found in the centromere region of the chromosome. What term refers to these specialized structures?

Accepted Answer

A) nucleosomes 
B) chromatids 
C) kinetochores 
D) centrosomes 
A) nucleosomes 
B) chromatids 
C) kinetochores 
D) centrosomes

Question 20

Which term refers to the mechanism of prokaryotic growth, DNA replication, and cell division that results in two identical daughter cells?

Accepted Answer

A) meiosis 
B) binary fission 
C) budding 
D) mitosis 
A) meiosis 
B) binary fission 
C) budding 
D) mitosis

Exam 8: Cell Cycles

When is a cell committed to undergoing mitosis?

When does centriole replication occur in the cell cycle?

During which phase of the cell cycle is cyclin degraded, resulting in the transition to G1?

At the G2-to-M checkpoint, one of the cyclins has reached a concentration great enough to complex with one of the CDKs to initiate DNA synthesis. Which cyclin and which CDK are the ones involved?

How is cell division in plant cells different than cell division in animal cells?

Why are cancer cell lines, rather than normal cells, frequently used to study biological processes?

How is cytokinesis different in plant and animal cells?

For each phrase, choose the most appropriate component of cell cycle regulation. Each component may be used once, more than once, or not at all. -regulates cell division

In which type of cell do duplicated centrioles move to opposite poles, and during which part of the cell cycle does this occur?

How does the speed of division in normal cells and blastema cells differ?

Which of the following is an activity included in the stages of cytoplasmic division?

Which term refers to duplication of the complete set of chromosomes in an organism's cell, followed by the separation of the duplicated chromosomes into two new cells?

What external factors influence a cell to divide?

How are the two chromosomes separated and distributed to the two ends of the cell during prokaryotic cell division?

Identify the stage of mitosis in which each activity occurs. -Duplicated chromosomes condense into chromosomes.

Embryonic development begins with a single egg being fertilized by a single sperm, thus forming a zygote; the zygote then undergoes mitosis. How many cells would be present at the conclusion of four mitotic divisions? a.16 b.8 c.4 d.2

Photomicrograph by Dr. Conly L. Rieder, East Greenbush, New York -Which stage of mitosis is shown in photo D in the figure?

What is the primary function of centrioles in animal cells?

The microtubules that make up the mitotic spindle attach themselves to special structures that are found in the centromere region of the chromosome. What term refers to these specialized structures?

Which term refers to the mechanism of prokaryotic growth, DNA replication, and cell division that results in two identical daughter cells?

Light and Life

The Cell: an Overview

Defining Life and Its Origins

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Genetic Recombination

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Control of Gene Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Transport in Animals: the Circulatory System

Reproduction in Animals

Animal Development

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

Filters

During which phase of the cell cycle is cyclin degraded, resulting in the transition to G₁?

At the G₂-to-M checkpoint, one of the cyclins has reached a concentration great enough to complex with one of the CDKs to initiate DNA synthesis. Which cyclin and which CDK are the ones involved?