Question 1

Which of the following descriptions of malignant and benign tumors are true? Select all that apply.

Accepted Answer

A) Both benign and malignant tumors are forms of abnormal cell growth 
B) Benign tumors tend to grow very large while malignant tumors stay small. 
C) Malignant tumors have more genetic mutations than benign tumors . 
D) benign tumors can metastasize while malignant tumors tend to stay in one location. 
E) malignant tumors have more genetic mutations than benign tumors. 
A) Both benign and malignant tumors are forms of abnormal cell growth 
B) Benign tumors tend to grow very large while malignant tumors stay small. 
C) Malignant tumors have more genetic mutations than benign tumors . 
D) benign tumors can metastasize while malignant tumors tend to stay in one location. 
E) malignant tumors have more genetic mutations than benign tumors.

Question 2

Use the following line to complete the next group of questions.

The enzymes that bring about apoptosis:
-are ordinarily held in check by inhibitors.

Accepted Answer

A) True 
 B)False

Question 3

The diploid (2n)number of chromosomes for a human being is

Accepted Answer

A) 23. 
B) 24. 
C) 44. 
D) 46. 
E) 48. 
A) 23. 
B) 24. 
C) 44. 
D) 46. 
E) 48.

Question 4

Which of the following are necessary for a cell to pass the G1 checkpoint?

Accepted Answer

A) Growth signals must be present. 
B) Sufficient nutrients must be available. 
C) The DNA must be undamaged. 
D) All of these. 
E) None of these. 
A) Growth signals must be present. 
B) Sufficient nutrients must be available. 
C) The DNA must be undamaged. 
D) All of these. 
E) None of these.

Question 5

In some organisms,mitosis occurs without cytokinesis.This results in

Accepted Answer

A) cell death. 
B) a multinucleated cell. 
C) cells arrested in the G0 phase. 
D) cells with no nucleus. 
E) uncontrolled cell division. 
A) cell death. 
B) a multinucleated cell. 
C) cells arrested in the G0 phase. 
D) cells with no nucleus. 
E) uncontrolled cell division.

Question 6

Which represents the correct sequence of stages in the cell cycle?

Accepted Answer

A) G1,G2,S,M 
B) G1,G2,M,S 
C) G1,M,G2,S 
D) G1,S,G2,M 
A) G1,G2,S,M 
B) G1,G2,M,S 
C) G1,M,G2,S 
D) G1,S,G2,M

Question 7

What might prevent a cell from passing the G1 checkpoint?

Accepted Answer

A) The DNA has not completed replication. 
B) The cell may need to enter the G0 stage. 
C) The cell may have damaged DNA and need to undergo apoptosis. 
D) Only A and B are correct. 
E) Only B and C are correct. 
A) The DNA has not completed replication. 
B) The cell may need to enter the G0 stage. 
C) The cell may have damaged DNA and need to undergo apoptosis. 
D) Only A and B are correct. 
E) Only B and C are correct.

Question 8

Which statement below lists the correct steps for binary fission?

Accepted Answer

A) 1)attachment of chromosome to the plasma membrane,2.enlargement of cell volume,3.DNA replication occurs,4.cell elongates and chromosomes are pulled apart,5.a new cell wall and plasma membrane divide the cell in half 
B) 1)attachment of chromosome to the plasma membrane,2.enlargement of cell volume,3.DNA replication occurs,4.a new cell wall and plasma membrane divide the cell in half,5.cell elongates and chromosomes are pulled apart 
C) 1)a new cell wall and plasma membrane divide the cell in half,2.attachment of chromosome to the plasma membrane,3.enlargement of cell volume,4.DNA replication occurs,5.cell elongates and chromosomes are pulled apart 
D) 1)enlargement of cell volume,2.attachment of chromosome to the plasma membrane,3.DNA replication occurs,4.cell elongates and chromosomes are pulled apart,5.a new cell wall and plasma membrane divide the cell in half 
A) 1)attachment of chromosome to the plasma membrane,2.enlargement of cell volume,3.DNA replication occurs,4.cell elongates and chromosomes are pulled apart,5.a new cell wall and plasma membrane divide the cell in half 
B) 1)attachment of chromosome to the plasma membrane,2.enlargement of cell volume,3.DNA replication occurs,4.a new cell wall and plasma membrane divide the cell in half,5.cell elongates and chromosomes are pulled apart 
C) 1)a new cell wall and plasma membrane divide the cell in half,2.attachment of chromosome to the plasma membrane,3.enlargement of cell volume,4.DNA replication occurs,5.cell elongates and chromosomes are pulled apart 
D) 1)enlargement of cell volume,2.attachment of chromosome to the plasma membrane,3.DNA replication occurs,4.cell elongates and chromosomes are pulled apart,5.a new cell wall and plasma membrane divide the cell in half

Question 9

Angiogenesis

Accepted Answer

A) is the growth of blood vessels into the tumor. 
B) is directed by additional mutations in tumor cells. 
C) brings nutrients and oxygen to a tumor. 
D) All of these. 
E) None of these. 
A) is the growth of blood vessels into the tumor. 
B) is directed by additional mutations in tumor cells. 
C) brings nutrients and oxygen to a tumor. 
D) All of these. 
E) None of these.

Question 10

Viruses and chemical exposure can cause mutations in proto-oncogenes which can lead to cancer.

Accepted Answer

A) True 
 B)False

Question 11

Name the labeled structures in the figure and answer the following questions.   A.________
B.________
C.________
D.When the structures labeled "A" separate,what are they called?
E.What is the function of the structure labeled "C"?

Accepted Answer

A.Sister chromatids B.Centrome

Question 12

Cancer cells require many nutrients which are supplied by blood vessels.The growth of new blood vessels into cancerous tissue is called

Accepted Answer

A) angiogenesis. 
B) metastasis. 
C) carcinogenesis. 
D) apoptosis. 
A) angiogenesis. 
B) metastasis. 
C) carcinogenesis. 
D) apoptosis.

Question 13

How does euchromatin differ from heterochromatin? Select all that apply.

Accepted Answer

A) Euchromatin represents the active chromatin containing genes that are being transcribed. 
B) Heterochromatin is more compacted than euchromatin. 
C) Euchromatin is more representative of the chromosomes during mitosis. 
D) Most chromosomes contain both regions of euchromatin and heterochromatin. 
A) Euchromatin represents the active chromatin containing genes that are being transcribed. 
B) Heterochromatin is more compacted than euchromatin. 
C) Euchromatin is more representative of the chromosomes during mitosis. 
D) Most chromosomes contain both regions of euchromatin and heterochromatin.

Question 14

Which of the following statements applies to mitosis but not to cytokinesis?

Accepted Answer

A) It contains a checkpoint that will evaluate the quality of the cell. 
B) It requires a large amount of ATP in order for the cellular mechanisms to function. 
C) If it is disrupted,it can lead to an abnormal cell. 
D) It results in two daughter cells that are half the size of the original cell. 
A) It contains a checkpoint that will evaluate the quality of the cell. 
B) It requires a large amount of ATP in order for the cellular mechanisms to function. 
C) If it is disrupted,it can lead to an abnormal cell. 
D) It results in two daughter cells that are half the size of the original cell.

Question 15

If a parent cell has 48 chromosomes,how many chromosomes will each daughter cell have after mitosis and cytokinesis occurs?

Accepted Answer

A) 24 chromosomes 
B) 48 chromosomes 
C) 12 chromosomes 
D) 96 chromosomes 
A) 24 chromosomes 
B) 48 chromosomes 
C) 12 chromosomes 
D) 96 chromosomes

Question 16

The function of mitosis is

Accepted Answer

A) growth of the organism and tissue repair. 
B) to ensure that each new cell receives a complete set of genetic information. 
C) asexual reproduction in some species. 
D) All of the choices are correct. 
A) growth of the organism and tissue repair. 
B) to ensure that each new cell receives a complete set of genetic information. 
C) asexual reproduction in some species. 
D) All of the choices are correct.

Question 17

Which is NOT correctly associated with cancer?

Accepted Answer

A) Angiogenesis forms new blood vessels and brings nutrients and oxygen to the tumor. 
B) The cells are organized in a single layer. 
C) Metastasis establishes new tumors distant from the site of the primary tumor. 
D) Cells may have abnormally large nuclei. 
A) Angiogenesis forms new blood vessels and brings nutrients and oxygen to the tumor. 
B) The cells are organized in a single layer. 
C) Metastasis establishes new tumors distant from the site of the primary tumor. 
D) Cells may have abnormally large nuclei.

Question 18

In the bone marrow,stem cells produce erythrocytes which lose their nucleus and function for a few months in the bloodstream before they die.Erythrocytes never divide.Based on this information,erythrocytes

Accepted Answer

A) leave the cell cycle in a G0 phase,after exiting G1. 
B) leave the cell cycle in a G3 phase,which immediately follows G2. 
C) halt in the midst of the S phase. 
D) continually cycle but simply fail to go through cytokinesis. 
E) reverse from G2 to G1. 
A) leave the cell cycle in a G0 phase,after exiting G1. 
B) leave the cell cycle in a G3 phase,which immediately follows G2. 
C) halt in the midst of the S phase. 
D) continually cycle but simply fail to go through cytokinesis. 
E) reverse from G2 to G1.

Question 19

A human cell contains at least 2 m of DNA,yet all of this DNA is packed into a nucleus that is about 6 μm in diameter.How is this accomplished? Select all that apply.

Accepted Answer

A) DNA is wrapped around histone proteins giving it the appearance of a string of beads. 
B) DNA is folded into a zigzag structure. 
C) The DNA is coiled into radial loops. 
D) The DNA is cut at several locations and each section is loosely wrapped into a bead-like shape. 
A) DNA is wrapped around histone proteins giving it the appearance of a string of beads. 
B) DNA is folded into a zigzag structure. 
C) The DNA is coiled into radial loops. 
D) The DNA is cut at several locations and each section is loosely wrapped into a bead-like shape.

Question 20

The haploid (n)number of chromosomes for a human being is

Accepted Answer

A) 23. 
B) 24. 
C) 44. 
D) 46. 
E) 48. 
A) 23. 
B) 24. 
C) 44. 
D) 46. 
E) 48.

Exam 9: The Cell Cycle and Cellular Reproduction

Which of the following descriptions of malignant and benign tumors are true? Select all that apply.

Use the following line to complete the next group of questions. The enzymes that bring about apoptosis: -are ordinarily held in check by inhibitors.

The diploid (2n)number of chromosomes for a human being is

Which of the following are necessary for a cell to pass the G1 checkpoint?

In some organisms,mitosis occurs without cytokinesis.This results in

Which represents the correct sequence of stages in the cell cycle?

What might prevent a cell from passing the G1 checkpoint?

Which statement below lists the correct steps for binary fission?

Angiogenesis

Viruses and chemical exposure can cause mutations in proto-oncogenes which can lead to cancer.

Name the labeled structures in the figure and answer the following questions. A.________ B.________ C.________ D.When the structures labeled "A" separate,what are they called? E.What is the function of the structure labeled "C"?

Cancer cells require many nutrients which are supplied by blood vessels.The growth of new blood vessels into cancerous tissue is called

How does euchromatin differ from heterochromatin? Select all that apply.

Which of the following statements applies to mitosis but not to cytokinesis?

If a parent cell has 48 chromosomes,how many chromosomes will each daughter cell have after mitosis and cytokinesis occurs?

The function of mitosis is

Which is NOT correctly associated with cancer?

In the bone marrow,stem cells produce erythrocytes which lose their nucleus and function for a few months in the bloodstream before they die.Erythrocytes never divide.Based on this information,erythrocytes

A human cell contains at least 2 m of DNA,yet all of this DNA is packed into a nucleus that is about 6 μm in diameter.How is this accomplished? Select all that apply.

The haploid (n)number of chromosomes for a human being is

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development and Aging

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

Which of the following are necessary for a cell to pass the G₁ checkpoint?

What might prevent a cell from passing the G₁ checkpoint?

Name the labeled structures in the figure and answer the following questions. A. B. C. D.When the structures labeled "A" separate,what are they called? E.What is the function of the structure labeled "C"?