Question 1

The complete collection of an organism's genetic information constitutes:

Accepted Answer

A) a chromosome. 
B) proteins. 
C) a gene. 
D) a genome. 
A) a chromosome. 
B) proteins. 
C) a gene. 
D) a genome.

Question 2

The chromosomes become visible and the nucleus starts to break up during:

Accepted Answer

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

Question 3

Chromosomes uncoil and new nuclei form during:

Accepted Answer

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

Question 4

Some anticancer chemotherapy agents interfere with the proper functioning of microtubules.How do these anticancer chemotherapy agents work?

Accepted Answer

A) They inhibit the mitotic spindle and prevent cell division. 
B) They inhibit the contractile ring and prevent cell division. 
C) They inhibit telophase because microtubules are required to form nuclear envelopes. 
D) Microtubules replicate DNA, so they inhibit chromosome duplication. 
A) They inhibit the mitotic spindle and prevent cell division. 
B) They inhibit the contractile ring and prevent cell division. 
C) They inhibit telophase because microtubules are required to form nuclear envelopes. 
D) Microtubules replicate DNA, so they inhibit chromosome duplication.

Question 5

Match between columns
                        Premises: Microtubules shorten and the genetic material divides
A contractile ring is narrowing along the cell's equator
Chromosomes unwind and new nuclei form
Chromosomes condense and the mitotic spindle begins to form
The nuclear envelope has disappeared completely and sister chromatids are facing opposite poles

Accepted Answer

The Answer of anaphase and prophase and telophase and metaphase is...

Question 6

The chief accomplishment of telophase is the organization of chromosomes into new nuclei.

Accepted Answer

A) True 
 B)False

Question 7

Chromosomes are aligned at the equator of a cell during:

Accepted Answer

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

Question 8

What is the relationship between genes and chromosomes?

Accepted Answer

A) Chromosomes are proteins that carry genes made of DNA. 
B) Genes are the proteins encoded by chromosomes. 
C) Genes are the proteins around which DNA chromosomes are packaged. 
D) A chromosome is a DNA molecule with many genes. 
A) Chromosomes are proteins that carry genes made of DNA. 
B) Genes are the proteins encoded by chromosomes. 
C) Genes are the proteins around which DNA chromosomes are packaged. 
D) A chromosome is a DNA molecule with many genes.

Question 9

What is the relationship between DNA and chromatin?

Accepted Answer

A) Chromatin is the collection of proteins encoded by DNA. 
B) A chromatin is a DNA molecule that is separated during mitosis. 
C) A chromatin is a unit of DNA whose sequence encodes a protein. 
D) Chromatin is the combination of DNA packaged around proteins. 
A) Chromatin is the collection of proteins encoded by DNA. 
B) A chromatin is a DNA molecule that is separated during mitosis. 
C) A chromatin is a unit of DNA whose sequence encodes a protein. 
D) Chromatin is the combination of DNA packaged around proteins.

Question 10

Chromosome I from your mother and chromosome I from your father are said to be homologous.This is because the chromosomes:

Accepted Answer

A) appear the same size in a karyotype. 
B) have different genes on them. 
C) have the same genes on them. 
D) determine the sex of the child. 
A) appear the same size in a karyotype. 
B) have different genes on them. 
C) have the same genes on them. 
D) determine the sex of the child.

Question 11

Refer to the figure below, and then answer the question that follows.
  
-A cell that no longer needs to divide will remain in G₀ phase.But if an injury occurs to an organ,signals will tell the cell to return to the cell cycle to replace lost or damaged cells.To which point in the cycle will the cell return,and which phase would it enter next?

Accepted Answer

Cells would reenter

Question 12

Sister chromatids are separating from each other during:

Accepted Answer

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

Question 13

Why is prokaryotic cell division fundamentally different from eukaryotic cell division?

Accepted Answer

A) Prokaryotic cells divide for several months and then live for decades without dividing. 
B) Prokaryotic cells do not have a plasma membrane. 
C) Prokaryotes have many more chromosomes to divide. 
D) Prokaryotic cells have a single chromosome and no nuclear membrane. 
A) Prokaryotic cells divide for several months and then live for decades without dividing. 
B) Prokaryotic cells do not have a plasma membrane. 
C) Prokaryotes have many more chromosomes to divide. 
D) Prokaryotic cells have a single chromosome and no nuclear membrane.

Question 14

What distinguishes one gene from another?

Accepted Answer

A) the length of the chromosome the gene is on 
B) the order of bases in the gene 
C) the position of the gene on a chromosome 
D) the order of amino acids of which the genes are made 
A) the length of the chromosome the gene is on 
B) the order of bases in the gene 
C) the position of the gene on a chromosome 
D) the order of amino acids of which the genes are made

Question 15

At what point in the cell cycle does DNA replication take place?

Accepted Answer

A) during mitosis 
B) continually throughout the cell cycle 
C) during cytokinesis 
D) before mitosis 
A) during mitosis 
B) continually throughout the cell cycle 
C) during cytokinesis 
D) before mitosis

Question 16

At several points in the cell cycle there are checkpoints that control the cell's passage from one phase to the next.If a cell receives a signal at each checkpoint,it continues to the next phase; if it does not receive the signal,the cell does not continue.For example,a growth factor may stimulate a cell to move from G₁ into S phase.If no growth factor is present,the cell cycle stops in G₁ and the cell does not divide.Predict what would happen to a cell and to a multicellular organism if there was a defect at the checkpoint and the cell continued through the cell cycle even in the absence of a signal.

Accepted Answer

If a cell cycle checkpoint is defective,

Question 17

Why do karyotypes always show chromosomes at the point when cell division is about to occur?

Accepted Answer

A) This is the only cell cycle point in which the chromosomes are unduplicated. 
B) The chromosomes are easier to see when they are elongated and uncondensed. 
C) This is the time at which the chromosomes are being duplicated. 
D) The chromosomes are fully condensed as cell division approaches. 
A) This is the only cell cycle point in which the chromosomes are unduplicated. 
B) The chromosomes are easier to see when they are elongated and uncondensed. 
C) This is the time at which the chromosomes are being duplicated. 
D) The chromosomes are fully condensed as cell division approaches.

Question 18

A cell is observed under the microscope.What feature will indicate that it is in anaphase?

Accepted Answer

A) DNA is elongated, not condensed, and difficult to visualize. 
B) Two separate nuclear membranes are visible. 
C) Centrosomes are just beginning to separate and form the spindle. 
D) Sister chromatids are separating. 
A) DNA is elongated, not condensed, and difficult to visualize. 
B) Two separate nuclear membranes are visible. 
C) Centrosomes are just beginning to separate and form the spindle. 
D) Sister chromatids are separating.

Question 19

During the cell cycle of a eukaryotic cell,each chromosome is replicated to become a chromosome with two chromatids,and then the chromatids are pulled apart to form two separate chromosomes.

Accepted Answer

A) True 
 B)False

Question 20

While looking under a microscope,you see two neighboring daughter cells.One of the cells contains three chromosomes,and the other contains five.The parent cell normally contains four chromosomes.What could be the reason for the different number of chromosomes in the cells?

Accepted Answer

A) The division of sister chromatids of one chromosome did not occur properly during mitosis. 
B) The nuclear envelope did not dissolve, so mitosis could not occur at all. 
C) Replication of DNA did not occur properly. 
D) The division of homologous chromosomes during meiosis II did not occur properly. 
A) The division of sister chromatids of one chromosome did not occur properly during mitosis. 
B) The nuclear envelope did not dissolve, so mitosis could not occur at all. 
C) Replication of DNA did not occur properly. 
D) The division of homologous chromosomes during meiosis II did not occur properly.

Exam 9: The Links in Lifes Chain: Genetics and Cell Division

The complete collection of an organism's genetic information constitutes:

The chromosomes become visible and the nucleus starts to break up during:

Chromosomes uncoil and new nuclei form during:

Some anticancer chemotherapy agents interfere with the proper functioning of microtubules.How do these anticancer chemotherapy agents work?

The chief accomplishment of telophase is the organization of chromosomes into new nuclei.

Chromosomes are aligned at the equator of a cell during:

What is the relationship between genes and chromosomes?

What is the relationship between DNA and chromatin?

Chromosome I from your mother and chromosome I from your father are said to be homologous.This is because the chromosomes:

Sister chromatids are separating from each other during:

Why is prokaryotic cell division fundamentally different from eukaryotic cell division?

What distinguishes one gene from another?

At what point in the cell cycle does DNA replication take place?

Why do karyotypes always show chromosomes at the point when cell division is about to occur?

A cell is observed under the microscope.What feature will indicate that it is in anaphase?

During the cell cycle of a eukaryotic cell,each chromosome is replicated to become a chromosome with two chromatids,and then the chromatids are pulled apart to form two separate chromosomes.

While looking under a microscope,you see two neighboring daughter cells.One of the cells contains three chromosomes,and the other contains five.The parent cell normally contains four chromosomes.What could be the reason for the different number of chromosomes in the cells?

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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