Question 1

At what point during the cell cycle do chromosomes decondense into chromatin?

Accepted Answer

A) at the end of telophase 
B) at the beginning of metaphase 
C) at the beginning of interphase 
D) at the end of interphase 
A) at the end of telophase 
B) at the beginning of metaphase 
C) at the beginning of interphase 
D) at the end of interphase

Question 2

Which term represents two identical copies of a chromosome?

Accepted Answer

A) sister chromosomes 
B) sister chromatids 
C) brother chromosomes 
D) brother chromatids 
A) sister chromosomes 
B) sister chromatids 
C) brother chromosomes 
D) brother chromatids

Question 3

Which of the following regulates progression through the phases of the cell cycle?

Accepted Answer

A) fluctuating concentrations of cyclin-dependent kinases 
B) fluctuating concentrations of microtubules 
C) fluctuating concentrations of cyclins 
D) fluctuating concentrations of actin 
A) fluctuating concentrations of cyclin-dependent kinases 
B) fluctuating concentrations of microtubules 
C) fluctuating concentrations of cyclins 
D) fluctuating concentrations of actin

Question 4

During which phases of mitosis are chromosomes composed of two sister chromatids?

Accepted Answer

A) in anaphase and telophase 
B) in prophase and metaphase 
C) in prophase, metaphase, and anaphase 
D) in prophase and telophase 
A) in anaphase and telophase 
B) in prophase and metaphase 
C) in prophase, metaphase, and anaphase 
D) in prophase and telophase

Question 5

What is it that bacterial cells typically have compared to eukaryotic cells?

Accepted Answer

A) two circular chromosomes versus numerous circular chromosomes, depending on the species 
B) a single circular chromosome versus many linear chromosomes 
C) one linear chromosome versus many circular chromosomes 
D) several circular chromosomes versus many linear chromosomes 
A) two circular chromosomes versus numerous circular chromosomes, depending on the species 
B) a single circular chromosome versus many linear chromosomes 
C) one linear chromosome versus many circular chromosomes 
D) several circular chromosomes versus many linear chromosomes

Question 6

Early in mitosis, chromatin condenses into the compact, rodlike structures known as chromosomes. What process takes place more easily as a result?

Accepted Answer

A) the orderly distribution of DNA into the two new nuclei 
B) the disappearance of the nuclear envelope 
C) the formation of the mitotic spindle 
D) the replication of DNA 
A) the orderly distribution of DNA into the two new nuclei 
B) the disappearance of the nuclear envelope 
C) the formation of the mitotic spindle 
D) the replication of DNA

Question 7

Which of the following is synonymous with blastema?

Accepted Answer

A) a temporary cell organelle 
B) a temporary cell 
C) a temporary organ 
D) a temporary tissue 
A) a temporary cell organelle 
B) a temporary cell 
C) a temporary organ 
D) a temporary tissue

Question 8

Identify the stage of mitosis in which each activity occurs.
-RNA synthesis shuts down.

Accepted Answer

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

Question 9

Which sentence characterizes cancer cells?

Accepted Answer

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

Question 10

In general, microtubules disassemble and consequently pull the chromatids to the ends of the spindle. When does this occur?

Accepted Answer

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

Question 11

Which of the following best describes meiosis and/or mitosis?

Accepted Answer

A) Meiosis is involved in producing cells with the same number of chromosomes as the parent cell. 
B) Mitosis is involved in producing cells with half the number of chromosomes as the parent cell. 
C) Meiosis is involved in repair and growth of the cells that comprise the body of an organism. 
D) Mitosis is involved in repair and growth of the cells that comprise the body of an organism. 
A) Meiosis is involved in producing cells with the same number of chromosomes as the parent cell. 
B) Mitosis is involved in producing cells with half the number of chromosomes as the parent cell. 
C) Meiosis is involved in repair and growth of the cells that comprise the body of an organism. 
D) Mitosis is involved in repair and growth of the cells that comprise the body of an organism.

Question 12

What is the name of the specific region where replication of a bacterial chromosome begins?

Accepted Answer

A) the replication fork 
B) the ori 
C) the ter 
D) the beg 
A) the replication fork 
B) the ori 
C) the ter 
D) the beg

Question 13

At what stage of the cell cycle is DNA found in its condensed form, which is known as a chromosome?

Accepted Answer

A) throughout prophase only 
B) throughout prophase and metaphase 
C) throughout the cell cycle 
D) throughout mitosis until late telophase 
A) throughout prophase only 
B) throughout prophase and metaphase 
C) throughout the cell cycle 
D) throughout mitosis until late telophase

Question 14

What is contained in each of the two daughter cells that result from normal mitotic division of the original parent cell?

Accepted Answer

A) the same number of chromosomes and genes as the parent cell, and identical to those of the parent cell 
B) one-half the number of chromosomes as the parent cell, but different genes 
C) one-half of the number of chromosomes and genes as the parent cell, and identical to those of the parent cell 
D) the same number of chromosomes as the parent cell, but different genes 
A) the same number of chromosomes and genes as the parent cell, and identical to those of the parent cell 
B) one-half the number of chromosomes as the parent cell, but different genes 
C) one-half of the number of chromosomes and genes as the parent cell, and identical to those of the parent cell 
D) the same number of chromosomes as the parent cell, but different genes

Question 15

Which statement best explains contact inhibition?

Accepted Answer

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

Question 16

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.
-turns CDK on or off

Accepted Answer

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

Question 17

Which of the following terms is synonymous with restriction point?

Accepted Answer

A) G2 checkpoint 
B) G1 checkpoint 
C) G0 checkpoint 
D) S checkpoint 
A) G2 checkpoint 
B) G1 checkpoint 
C) G0 checkpoint 
D) S checkpoint

Question 18

What is the correct sequence of phases in mitosis?

Accepted Answer

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

Question 19

Which of the following are products of mitosis?

Accepted Answer

A) gametes in animals and spores in plants 
B) gametes and spores in plants 
C) body cells in animals and spores in plants 
D) body cells in animals and plants 
A) gametes in animals and spores in plants 
B) gametes and spores in plants 
C) body cells in animals and spores in plants 
D) body cells in animals and plants

Question 20

Which of the following events occurs during interphase?

Accepted Answer

A) formation of the spindle 
B) alignment of chromosomes at the spindle midpoint 
C) disappearance of the nuclear envelope 
D) DNA synthesis 
A) formation of the spindle 
B) alignment of chromosomes at the spindle midpoint 
C) disappearance of the nuclear envelope 
D) DNA synthesis

Exam 8: Cell Cycles

At what point during the cell cycle do chromosomes decondense into chromatin?

Which term represents two identical copies of a chromosome?

Which of the following regulates progression through the phases of the cell cycle?

During which phases of mitosis are chromosomes composed of two sister chromatids?

What is it that bacterial cells typically have compared to eukaryotic cells?

Early in mitosis, chromatin condenses into the compact, rodlike structures known as chromosomes. What process takes place more easily as a result?

Which of the following is synonymous with blastema?

Identify the stage of mitosis in which each activity occurs. -RNA synthesis shuts down.

Which sentence characterizes cancer cells?

In general, microtubules disassemble and consequently pull the chromatids to the ends of the spindle. When does this occur?

Which of the following best describes meiosis and/or mitosis?

What is the name of the specific region where replication of a bacterial chromosome begins?

At what stage of the cell cycle is DNA found in its condensed form, which is known as a chromosome?

What is contained in each of the two daughter cells that result from normal mitotic division of the original parent cell?

Which statement best explains contact inhibition?

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. -turns CDK on or off

Which of the following terms is synonymous with restriction point?

What is the correct sequence of phases in mitosis?

Which of the following are products of mitosis?

Which of the following events occurs during interphase?

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