Question 1

What causes the rhythmic change in cyclin concentration in the cell cycle?

Accepted Answer

A)  Its destruction by an enzyme phosphorylated by the cyclin- Cdk complex 
B)  An increase in production of a Cdk once the restriction point is passed 
C)  The binding of PDGF to receptors on the cell surface 
D)  The changing ratio of cytoplasm to genome 
E)  The cascade of increased production once the protein is phosphorylated by Cdk 
A)  Its destruction by an enzyme phosphorylated by the cyclin- Cdk complex 
B)  An increase in production of a Cdk once the restriction point is passed 
C)  The binding of PDGF to receptors on the cell surface 
D)  The changing ratio of cytoplasm to genome 
E)  The cascade of increased production once the protein is phosphorylated by Cdk

Question 2

The units of inheritance, called , are segments of the DNA of a chromosome, ranging from a few hundred to many thousands of nucleotides in length.

Accepted Answer

The answer of The units of inheritance, called , are...

Question 3

A contractile ring forms in which type of cells?

Accepted Answer

A)  Animals and plants 
B)  Bacteria and plants 
C)  Animal 
D)  Plants 
A)  Animals and plants 
B)  Bacteria and plants 
C)  Animal 
D)  Plants

Question 4

The nuclear membrane re- forms during

Accepted Answer

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

Question 5

Which of the following statements about stem cells is TRUE?

Accepted Answer

A)  They are found only in embryos. 
B)  They are found only in embryos and in the bone marrow of adults. 
C)  They are "perpetual" parent cells that never produce daughter cells. 
D)  They are able to differentiate into a variety of cell types. 
E)  They are permanently differentiated and cannot further divide. 
A)  They are found only in embryos. 
B)  They are found only in embryos and in the bone marrow of adults. 
C)  They are "perpetual" parent cells that never produce daughter cells. 
D)  They are able to differentiate into a variety of cell types. 
E)  They are permanently differentiated and cannot further divide.

Question 6

During which phase of mitosis do sister chromatids separate from each other?

Accepted Answer

A)  Anaphase 
B)  Prophase 
C)  Metaphase 
D)  Telophase 
A)  Anaphase 
B)  Prophase 
C)  Metaphase 
D)  Telophase

Question 7

Proteins that resemble beads on which DNA molecules are wound are called

Accepted Answer

A)  motor proteins. 
B)  centrioles. 
C)  histones. 
D)  spindles. 
E)  kinetochores. 
A)  motor proteins. 
B)  centrioles. 
C)  histones. 
D)  spindles. 
E)  kinetochores.

Question 8

DNA replication occurs

Accepted Answer

A)  between the gap phases (G1 and G2) of interphase. 
B)  at any time during cell division. 
C)  during prophase of mitosis. 
D)  immediately before prophase of mitosis. 
E)  during prophase of meiosis. 
A)  between the gap phases (G1 and G2) of interphase. 
B)  at any time during cell division. 
C)  during prophase of mitosis. 
D)  immediately before prophase of mitosis. 
E)  during prophase of meiosis.

Question 9

Cytokinesis takes place during metaphase.

Accepted Answer

A) True 
 B)False

Question 10

What is the function of centrioles?

Accepted Answer

A)  They are required for DNA replication. 
B)  They produce microtubules for the chromosomes to migrate along as they move to opposite poles of the cell. 
C)  They cause cytokinesis via the concentric shortening of microtubules. 
D)  They are the structure that holds the two daughter chromatids together at the centromere. 
A)  They are required for DNA replication. 
B)  They produce microtubules for the chromosomes to migrate along as they move to opposite poles of the cell. 
C)  They cause cytokinesis via the concentric shortening of microtubules. 
D)  They are the structure that holds the two daughter chromatids together at the centromere.

Question 11

Which of the following is the correct structure of a nucleotide?

Accepted Answer

A)  Phospholipid- base- sugar 
B)  Base- sugar- base 
C)  Phosphate- sugar- phosphate 
D)  Phosphate- sugar- base 
A)  Phospholipid- base- sugar 
B)  Base- sugar- base 
C)  Phosphate- sugar- phosphate 
D)  Phosphate- sugar- base

Question 12

The uncoiled DNA in a eukaryotic cell is much longer than the cell itself.

Accepted Answer

A) True 
 B)False

Question 13

For the question below, suppose that the somatic cells of humanoid X contain a total of 4 chromosomes [2N = 4] (or 2 pairs of chromosomes, [N = 2]). How many chromatids and chromosomes are present at the following stage mitosis? Answers should be filled in for the blank spaces in the table below.

Accepted Answer

The answer of For the question below, suppose that the...

Question 14

In plant cytokinesis, cellulose is laid down forming

Accepted Answer

A)  a cleavage furrow. 
B)  cell walls. 
C)  a cell plate. 
D)  a middle lamella. 
E)  a plasma membrane. 
A)  a cleavage furrow. 
B)  cell walls. 
C)  a cell plate. 
D)  a middle lamella. 
E)  a plasma membrane.

Question 15

The cell cycle is controlled in most cells by

Accepted Answer

A)  a series of checkpoints. 
B)  cell size, when the cell reaches a certain size, it divides. 
C)  different cells exhibit different control strategies, any of the 4 above can be found in eukaryotic organisms. 
D)  time- after a certain length of time the cell divides. 
E)  the completion of one phase which triggers the beginning of the next. 
A)  a series of checkpoints. 
B)  cell size, when the cell reaches a certain size, it divides. 
C)  different cells exhibit different control strategies, any of the 4 above can be found in eukaryotic organisms. 
D)  time- after a certain length of time the cell divides. 
E)  the completion of one phase which triggers the beginning of the next.

Question 16

The abbreviation DNA stands for _ _.

Accepted Answer

deoxyribon

Question 17

What occurs immediately following cytokinesis?

Accepted Answer

A)  The G1 portion of interphase 
B)  Telophase 
C)  Prophase 
D)  Anaphase 
A)  The G1 portion of interphase 
B)  Telophase 
C)  Prophase 
D)  Anaphase

Question 18

Heritable information exists as discrete units called genes, which are located on .

Accepted Answer

The answer of Heritable information exists as discrete units called...

Question 19

The chromosomes are aligned at the spindle equator during

Accepted Answer

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

Question 20

The two main stages of the cell cycle are called

Accepted Answer

A)  cytokinesis and mitosis. 
B)  interphase and anaphase. 
C)  telophase and cytokinesis. 
D)  mitosis and interphase. 
A)  cytokinesis and mitosis. 
B)  interphase and anaphase. 
C)  telophase and cytokinesis. 
D)  mitosis and interphase.

Exam 9: Cellular Reproduction

What causes the rhythmic change in cyclin concentration in the cell cycle?

The units of inheritance, called , are segments of the DNA of a chromosome, ranging from a few hundred to many thousands of nucleotides in length.

A contractile ring forms in which type of cells?

The nuclear membrane re- forms during

Which of the following statements about stem cells is TRUE?

During which phase of mitosis do sister chromatids separate from each other?

Proteins that resemble beads on which DNA molecules are wound are called

DNA replication occurs

Cytokinesis takes place during metaphase.

What is the function of centrioles?

Which of the following is the correct structure of a nucleotide?

The uncoiled DNA in a eukaryotic cell is much longer than the cell itself.

For the question below, suppose that the somatic cells of humanoid X contain a total of 4 chromosomes [2N = 4] (or 2 pairs of chromosomes, [N = 2]). How many chromatids and chromosomes are present at the following stage mitosis? Answers should be filled in for the blank spaces in the table below.

In plant cytokinesis, cellulose is laid down forming

The cell cycle is controlled in most cells by

The abbreviation DNA stands for _ _.

What occurs immediately following cytokinesis?

Heritable information exists as discrete units called genes, which are located on .

The chromosomes are aligned at the spindle equator during

The two main stages of the cell cycle are called

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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