Question 1

What would happen if you add mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G2?

Accepted Answer

A) Cell division would cease. 
B) The cells would enter prophase. 
C) The cells would undergo cytokinesis. 
D) Cell death would occur. 
A) Cell division would cease. 
B) The cells would enter prophase. 
C) The cells would undergo cytokinesis. 
D) Cell death would occur.

Question 2

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.
-levels fluctuate throughout the cell cycle

Accepted Answer

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

Question 3

A cell containing 84 chromatids at metaphase of mitosis would produce two nuclei. How many chromosomes would each contain in late telophase?

Accepted Answer

A) 21 
B) 42 
C) 84 
D) 168 
A) 21 
B) 42 
C) 84 
D) 168

Question 4

What happens to each daughter cell at the conclusion of mitosis?

Accepted Answer

A) It has DNA identical to the parent cell. 
B) It has twice the cytoplasm and the same amount of DNA as the parent cell. 
C) It has twice the amount of DNA and half the cytoplasm of the parent cell. 
D) It has half the DNA and half the cytoplasm found in the parent cell. 
A) It has DNA identical to the parent cell. 
B) It has twice the cytoplasm and the same amount of DNA as the parent cell. 
C) It has twice the amount of DNA and half the cytoplasm of the parent cell. 
D) It has half the DNA and half the cytoplasm found in the parent cell.

Question 5

What is the primary composition of the mitotic spindle?

Accepted Answer

A) microtubules 
B) intermediate filaments 
C) keratin 
D) actin filaments 
A) microtubules 
B) intermediate filaments 
C) keratin 
D) actin filaments

Question 6

What is the difference between a chromosome and a chromatid?

Accepted Answer

A chromosome is a linear DNA m

Question 7

When growing animal cells in a culture, what must be added to the culture medium for growth to occur?

Accepted Answer

A) growth factors 
B) RNA 
C) growth hormone 
D) DNA 
A) growth factors 
B) RNA 
C) growth hormone 
D) DNA

Question 8

Photomicrograph by Dr. Conly L. Rieder, East Greenbush, New York
-What do we call the stage of mitosis in photo C in the figure?

Accepted Answer

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

Question 9

Which of the following would be revealed by a comparison of a cancer cell and a normal cell?

Accepted Answer

A) Regulation of mitosis is strictly regulated in cancer cells; mitosis is unregulated in normal cells. 
B) Cancer cells undergo contact inhibition; normal cells do not. 
C) Cancer cells do not undergo contact inhibition; normal cells do. 
D) Cancer cells cannot metastasize; normal cells can. 
A) Regulation of mitosis is strictly regulated in cancer cells; mitosis is unregulated in normal cells. 
B) Cancer cells undergo contact inhibition; normal cells do not. 
C) Cancer cells do not undergo contact inhibition; normal cells do. 
D) Cancer cells cannot metastasize; normal cells can.

Question 10

What is the purpose of cell division in living organisms?

Accepted Answer

Multicellular organi

Question 11

Identify the stage of mitosis in which each activity occurs.
-Nuclear envelope disappears.

Accepted Answer

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

Question 12

Where do human nerve cells remain once they become mature and exit the cell cycle?

Accepted Answer

A) in G2 
B) in G1 
C) in G0 
D) in S phase 
A) in G2 
B) in G1 
C) in G0 
D) in S phase

Question 13

Identify the stage of mitosis in which each activity occurs.
-Sister chromatids are pulled to opposite spindle poles.

Accepted Answer

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

Question 14

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.
-levels remain constant throughout the cell cycle

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Which sentence best describes the difference between plant cell division and animal cell division?

Accepted Answer

A) In animal cells, but not plant cells, cytokinesis is accomplished by formation of a cleavage furrow. 
B) In animal cells, replication of chromosomes occurs during interphase, while in plant cells replication occurs when the nuclear envelope disintegrates. 
C) In plant cells, centrosomes have an important role in spindle formation, while in animal cells centrosomes do not function during cell division. 
D) In plant cells, but not animal cells, cytokinesis is accomplished by formation of a cleavage furrow. 
A) In animal cells, but not plant cells, cytokinesis is accomplished by formation of a cleavage furrow. 
B) In animal cells, replication of chromosomes occurs during interphase, while in plant cells replication occurs when the nuclear envelope disintegrates. 
C) In plant cells, centrosomes have an important role in spindle formation, while in animal cells centrosomes do not function during cell division. 
D) In plant cells, but not animal cells, cytokinesis is accomplished by formation of a cleavage furrow.

Question 17

What is the usual process by which organisms reproduce asexually?

Accepted Answer

A) mitosis 
B) gametogenesis 
C) meiosis 
D) spore formation 
A) mitosis 
B) gametogenesis 
C) meiosis 
D) spore formation

Question 18

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

Accepted Answer

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

Question 19

At the G1-to-S 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 G1/S and CDK2 
B) cyclin G1/S and CDK1 
C) cyclin S and CDK2 
D) cyclin S and CDK1 
A) cyclin G1/S and CDK2 
B) cyclin G1/S and CDK1 
C) cyclin S and CDK2 
D) cyclin S and CDK1

Question 20

Contact inhibition is an important mechanism for maintaining cell growth in developed organs and tissues. Suppose the organ and tissue cells remain in contact with each other. In order to prevent the cells from dividing, which phase of the cell cycle must they be in?

Accepted Answer

A) in G1 
B) in G0 
C) in G2 
D) in prophase 
A) in G1 
B) in G0 
C) in G2 
D) in prophase

Exam 8: Cell Cycles

What would happen if you add mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G2?

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. -levels fluctuate throughout the cell cycle

A cell containing 84 chromatids at metaphase of mitosis would produce two nuclei. How many chromosomes would each contain in late telophase?

What happens to each daughter cell at the conclusion of mitosis?

What is the primary composition of the mitotic spindle?

What is the difference between a chromosome and a chromatid?

When growing animal cells in a culture, what must be added to the culture medium for growth to occur?

Photomicrograph by Dr. Conly L. Rieder, East Greenbush, New York -What do we call the stage of mitosis in photo C in the figure?

Which of the following would be revealed by a comparison of a cancer cell and a normal cell?

What is the purpose of cell division in living organisms?

Identify the stage of mitosis in which each activity occurs. -Nuclear envelope disappears.

Where do human nerve cells remain once they become mature and exit the cell cycle?

Identify the stage of mitosis in which each activity occurs. -Sister chromatids are pulled to opposite spindle poles.

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. -levels remain constant throughout the cell cycle

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

Which sentence best describes the difference between plant cell division and animal cell division?

What is the usual process by which organisms reproduce asexually?

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

At the G1-to-S 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?

Contact inhibition is an important mechanism for maintaining cell growth in developed organs and tissues. Suppose the organ and tissue cells remain in contact with each other. In order to prevent the cells from dividing, which phase of the cell cycle must they be in?

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

What would happen if you add mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G₂?

At the G₁-to-S 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?