Question 1

Prokaryotic DNA molecules are packaged by _______ proteins, which associate with DNA.

Accepted Answer

The answer of Prokaryotic DNA molecules are packaged by _______...

Question 2

Human chromosomes

Accepted Answer

A)  are all of similar size. 
B)  may be visualized during prophase. 
C)  may be visualized during metaphase. 
D)  are all of similar shape. 
E)  all have centromeres in the same position. 
A)  are all of similar size. 
B)  may be visualized during prophase. 
C)  may be visualized during metaphase. 
D)  are all of similar shape. 
E)  all have centromeres in the same position.

Question 3

The difference between asexual and sexual reproduction is that

Accepted Answer

A)  asexual reproduction occurs only in bacteria, whereas sexual reproduction occurs in plants and animals. 
B)  asexual reproduction results from meiosis, whereas sexual reproduction results from mitosis. 
C)  asexual reproduction results in an organism that is identical to the parent, whereas sexual reproduction results in an organism that is not identical to either parent. 
D)  asexual reproduction results from the fusion of two gametes, whereas sexual reproduction produces clones of the parent organism. 
E)  asexual reproduction occurs only in haplontic organisms, whereas sexual reproduction occurs only in diplontic organisms. 
A)  asexual reproduction occurs only in bacteria, whereas sexual reproduction occurs in plants and animals. 
B)  asexual reproduction results from meiosis, whereas sexual reproduction results from mitosis. 
C)  asexual reproduction results in an organism that is identical to the parent, whereas sexual reproduction results in an organism that is not identical to either parent. 
D)  asexual reproduction results from the fusion of two gametes, whereas sexual reproduction produces clones of the parent organism. 
E)  asexual reproduction occurs only in haplontic organisms, whereas sexual reproduction occurs only in diplontic organisms.

Question 4

A triploid plant has

Accepted Answer

A)  one extra chromosome. 
B)  one extra set of chromosomes. 
C)  three chromosomes. 
D)  three times the chance of surviving that a monoploid has. 
E)  None of the above 
A)  one extra chromosome. 
B)  one extra set of chromosomes. 
C)  three chromosomes. 
D)  three times the chance of surviving that a monoploid has. 
E)  None of the above

Question 5

Chromosomes contain large amounts of interacting proteins known as

Accepted Answer

A)  pentanes. 
B)  hexosamines. 
C)  histones. 
D)  protein hormones. 
E)  histamines. 
A)  pentanes. 
B)  hexosamines. 
C)  histones. 
D)  protein hormones. 
E)  histamines.

Question 6

Refer to the diagram below of a phase of mitosis. Which cell structure is indicated by the two leaders?

Accepted Answer

A)  Chromosome 
B)  Centromere 
C)  Chromatid 
D)  Kinetochore microtubule 
E)  Centrioles 
A)  Chromosome 
B)  Centromere 
C)  Chromatid 
D)  Kinetochore microtubule 
E)  Centrioles

Question 7

At the milestone that defines telophase, the chromosomes

Accepted Answer

A)  separate. 
B)  come together. 
C)  are at opposite poles. 
D)  line up. 
E)  cross over. 
A)  separate. 
B)  come together. 
C)  are at opposite poles. 
D)  line up. 
E)  cross over.

Question 8

In meiosis,

Accepted Answer

A)  meiosis II reduces the chromosome number from diploid to haploid. 
B)  DNA replicates between meiosis I and meiosis II. 
C)  the chromatids that make up a chromosome in meiosis II are identical. 
D)  each chromosome in prophase I consists of four chromatids. 
E)  homologous chromosomes separate from one another in anaphase I. 
A)  meiosis II reduces the chromosome number from diploid to haploid. 
B)  DNA replicates between meiosis I and meiosis II. 
C)  the chromatids that make up a chromosome in meiosis II are identical. 
D)  each chromosome in prophase I consists of four chromatids. 
E)  homologous chromosomes separate from one another in anaphase I.

Question 9

A person with Klinefelter syndrome has 44 chromosomes and three sex chromosomes (XXY). The resulting aneuploidy is caused by

Accepted Answer

A)  nondisjunction. 
B)  crossing over. 
C)  a mutation. 
D)  an enzyme deficiency. 
E)  failure of DNA to replicate. 
A)  nondisjunction. 
B)  crossing over. 
C)  a mutation. 
D)  an enzyme deficiency. 
E)  failure of DNA to replicate.

Question 10

In meiosis II,

Accepted Answer

A)  four genetically identical cells are generated. 
B)  sister chromatids are separated. 
C)  DNA replication occurs. 
D)  crossing over occurs. 
E)  Both a and b 
A)  four genetically identical cells are generated. 
B)  sister chromatids are separated. 
C)  DNA replication occurs. 
D)  crossing over occurs. 
E)  Both a and b

Question 11

Describe two ways that the genetic diversity of organisms is increased during meiosis.

Accepted Answer

Genetic diversity is increased during cr

Question 12

Which of the following statements about chromatids is true?

Accepted Answer

A)  They are replicated chromosomes still joined together at the centromere. 
B)  They are identical in mitotic chromosomes. 
C)  They undergo recombination in mitosis. 
D)  They are identical in meiotic chromosomes. 
E)  Both a and b 
A)  They are replicated chromosomes still joined together at the centromere. 
B)  They are identical in mitotic chromosomes. 
C)  They undergo recombination in mitosis. 
D)  They are identical in meiotic chromosomes. 
E)  Both a and b

Question 13

Diploid cells of the fruit fly Drosophila have ten chromosomes. How many chromosomes does a Drosophila gamete have?

Accepted Answer

A)  1 
B)  2 
C)  5 
D)  10 
E)  20 
A)  1 
B)  2 
C)  5 
D)  10 
E)  20

Question 14

The G in G1 and G2 is short for "_______."

Accepted Answer

The answer of The G in G1 and G2 is...

Question 15

The heritable information of the cell is _______.

Accepted Answer

The answer of The heritable information of the cell is...

Question 16

The stage of the cell cycle during which DNA replicates is called the _______.

Accepted Answer

The answer of The stage of the cell cycle during...

Question 17

Imagine that there is a mutation in the Cdk gene such that its gene product is nonfunctional. What kind of effect would this mutation have on a mammalian white blood cell?

Accepted Answer

A)  The cell would be unable to replicate its DNA. 
B)  The cell would be unable to enter mitosis. 
C)  The cell would be unable to reproduce itself. 
D)  The cell would not be able to phosphorylate its associated cyclin. 
E)  All of the above 
A)  The cell would be unable to replicate its DNA. 
B)  The cell would be unable to enter mitosis. 
C)  The cell would be unable to reproduce itself. 
D)  The cell would not be able to phosphorylate its associated cyclin. 
E)  All of the above

Question 18

_______ is the fusion of two gametes.

Accepted Answer

The answer of _______ is the fusion of two gametes....

Question 19

The structure that is present during mitosis and is composed of two identical DNA molecules complexed with proteins and joined at the centromere is called a _______.

Accepted Answer

The answer of The structure that is present during mitosis...

Question 20

The fact that most monosomies and trisomies are lethal to human embryos illustrates the

Accepted Answer

A)  importance of the orderly distribution of genetic material during meiosis. 
B)  exchange of genetic information during crossing over. 
C)  advantage of sexual reproduction to the survival of a population. 
D)  fact that each chromosome contains a single molecule of DNA. 
E)  formation of haploid gametes as a result of meiosis. 
A)  importance of the orderly distribution of genetic material during meiosis. 
B)  exchange of genetic information during crossing over. 
C)  advantage of sexual reproduction to the survival of a population. 
D)  fact that each chromosome contains a single molecule of DNA. 
E)  formation of haploid gametes as a result of meiosis.

Exam 11: The Cell Cycle and Cell Division

Prokaryotic DNA molecules are packaged by _______ proteins, which associate with DNA.

Human chromosomes

The difference between asexual and sexual reproduction is that

A triploid plant has

Chromosomes contain large amounts of interacting proteins known as

Refer to the diagram below of a phase of mitosis. Which cell structure is indicated by the two leaders?

At the milestone that defines telophase, the chromosomes

In meiosis,

A person with Klinefelter syndrome has 44 chromosomes and three sex chromosomes (XXY). The resulting aneuploidy is caused by

In meiosis II,

Describe two ways that the genetic diversity of organisms is increased during meiosis.

Which of the following statements about chromatids is true?

Diploid cells of the fruit fly Drosophila have ten chromosomes. How many chromosomes does a Drosophila gamete have?

The G in G1 and G2 is short for "_______."

The heritable information of the cell is _______.

The stage of the cell cycle during which DNA replicates is called the _______.

Imagine that there is a mutation in the Cdk gene such that its gene product is nonfunctional. What kind of effect would this mutation have on a mammalian white blood cell?

_______ is the fusion of two gametes.

The structure that is present during mitosis and is composed of two identical DNA molecules complexed with proteins and joined at the centromere is called a _______.

The fact that most monosomies and trisomies are lethal to human embryos illustrates the

Studying Life

Small Molecules and the Chemistry of Life

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Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

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Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

Inheritance, Genes, and Chromosomes

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Gene Mutation and Molecular Medicine

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Development and Evolutionary Change

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The History of Life on Earth

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The Origin and Diversification of Eukaryotes

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