Question 1

The uncondensed length of human DNA found in chromosomes is _______,whereas a typical cell is 10 $\mu$m in length.

Accepted Answer

A)  5 $\mu$m 
B)  2 $\mu$m 
C)  2 meters 
D)  20 meters 
E)  200 meters 
A)  5 $\mu$m 
B)  2 $\mu$m 
C)  2 meters 
D)  20 meters 
E)  200 meters

Question 2

Which statement about plant cytokinesis is true?

Accepted Answer

A)  It begins when telophase ends. 
B)  A division furrow completely splits the cytoplasm. 
C)  It is under the control of Ca2+. 
D)  Vesicles fuse to form a cell plate. 
E)  The spindle fibers break down to form a cell plate. 
A)  It begins when telophase ends. 
B)  A division furrow completely splits the cytoplasm. 
C)  It is under the control of Ca2+. 
D)  Vesicles fuse to form a cell plate. 
E)  The spindle fibers break down to form a cell plate.

Question 3

The cell division process that ensures that only one of each pair of chromosomes is included in a gamete is called _______.

Accepted Answer

The answer of The cell division process that ensures that...

Question 4

In mitotic metaphase,a cell with eight sister chromatids has _______ centromere(s).

Accepted Answer

A)  no 
B)  one 
C)  two 
D)  four 
E)  eight 
A)  no 
B)  one 
C)  two 
D)  four 
E)  eight

Question 5

The haploid number in Drosophila melanogaster is 4.How many chromosomes would a trisomic individual have?

Accepted Answer

A)  3 
B)  7 
C)  8 
D)  9 
E)  12 
A)  3 
B)  7 
C)  8 
D)  9 
E)  12

Question 6

Accidents during meiosis that can result in trisomies and monosomies are called

Accepted Answer

A)  nondisjunctions. 
B)  inversions. 
C)  reciprocal translocations. 
D)  recombinations. 
E)  acrocentricities. 
A)  nondisjunctions. 
B)  inversions. 
C)  reciprocal translocations. 
D)  recombinations. 
E)  acrocentricities.

Question 7

Which statement about homologous chromosome pairs is false?

Accepted Answer

A)  They come from only one of the individual's parents. 
B)  They usually contain slightly different versions of the same genetic information. 
C)  They separate from each other during meiosis I. 
D)  They synapse during meiosis I. 
E)  Each contains two sister chromatids at the beginning of meiosis I. 
A)  They come from only one of the individual's parents. 
B)  They usually contain slightly different versions of the same genetic information. 
C)  They separate from each other during meiosis I. 
D)  They synapse during meiosis I. 
E)  Each contains two sister chromatids at the beginning of meiosis I.

Question 8

When the cyclin‒CDK complex phosphorylates RB,the cell cycle progresses from _______ to _______.

Accepted Answer

A)  G1 phase;G2 phase 
B)  G2 phase;prophase 
C)  G1 phase;S phase 
D)  S phase;prophase 
E)  metaphase;anaphase 
A)  G1 phase;G2 phase 
B)  G2 phase;prophase 
C)  G1 phase;S phase 
D)  S phase;prophase 
E)  metaphase;anaphase

Question 9

During asexual reproduction,the genetic material of the parent is passed on to the offspring by

Accepted Answer

A)  homologous pairing. 
B)  meiosis and fertilization. 
C)  mitosis and cytokinesis. 
D)  karyotyping. 
E)  chiasmata. 
A)  homologous pairing. 
B)  meiosis and fertilization. 
C)  mitosis and cytokinesis. 
D)  karyotyping. 
E)  chiasmata.

Question 10

A bacterial cell gives rise to two genetically identical daughter cells by a process known as

Accepted Answer

A)  nondisjunction. 
B)  mitosis. 
C)  meiosis. 
D)  binary fission. 
E)  fertilization. 
A)  nondisjunction. 
B)  mitosis. 
C)  meiosis. 
D)  binary fission. 
E)  fertilization.

Question 11

The members of a homologous pair of chromosomes in a sexually reproducing organism

Accepted Answer

A)  are identical in size and appearance. 
B)  come from only one parent. 
C)  separate to opposite poles of the cell during mitosis. 
D)  are found only in haploid cells. 
E)  are present only after the S phase. 
A)  are identical in size and appearance. 
B)  come from only one parent. 
C)  separate to opposite poles of the cell during mitosis. 
D)  are found only in haploid cells. 
E)  are present only after the S phase.

Question 12

The event in the cell division process that clearly involves microfilaments is

Accepted Answer

A)  chromosome separation during anaphase. 
B)  movement of chromosomes to the metaphase plate. 
C)  chromosome condensation during prophase. 
D)  disappearance of the nuclear envelope during prophase. 
E)  cytokinesis in animal cells. 
A)  chromosome separation during anaphase. 
B)  movement of chromosomes to the metaphase plate. 
C)  chromosome condensation during prophase. 
D)  disappearance of the nuclear envelope during prophase. 
E)  cytokinesis in animal cells.

Question 13

Which statement about sexual and asexual reproduction is true?

Accepted Answer

A)  Haplontic organisms reproduce asexually. 
B)  Sexual reproduction always involves the fertilization of eggs by sperm. 
C)  An organism can only reproduce either sexually or asexually. 
D)  Diplontic organisms are haploid in the gamete stage. 
E)  Diplontic organisms are diploid in the gamete stage. 
A)  Haplontic organisms reproduce asexually. 
B)  Sexual reproduction always involves the fertilization of eggs by sperm. 
C)  An organism can only reproduce either sexually or asexually. 
D)  Diplontic organisms are haploid in the gamete stage. 
E)  Diplontic organisms are diploid in the gamete stage.

Question 14

Asexual reproduction produces genetically identical individuals because

Accepted Answer

A)  chromosomes do not have to replicate during asexual reproduction. 
B)  it involves chromosome replication without cytokinesis. 
C)  no meiosis or fertilization takes place. 
D)  cell division occurs only in meiosis. 
E)  the mitotic spindle prevents nondisjunction. 
A)  chromosomes do not have to replicate during asexual reproduction. 
B)  it involves chromosome replication without cytokinesis. 
C)  no meiosis or fertilization takes place. 
D)  cell division occurs only in meiosis. 
E)  the mitotic spindle prevents nondisjunction.

Question 15

Which statement correctly distinguishes kinetochore microtubules from polar microtubules?

Accepted Answer

A)  Kinetochore microtubules are replaced by polar microtubules when the chromatids move toward the poles. 
B)  Only polar microtubules contain cytoplasmic dynein,which acts as a "molecular motor." 
C)  Kinetochore microtubules attach to the chromosomes,whereas polar microtubules extend from one pole to the other. 
D)  Kinetochore microtubules form before polar microtubules. 
E)  There is no difference;they are both names for the same structure. 
A)  Kinetochore microtubules are replaced by polar microtubules when the chromatids move toward the poles. 
B)  Only polar microtubules contain cytoplasmic dynein,which acts as a "molecular motor." 
C)  Kinetochore microtubules attach to the chromosomes,whereas polar microtubules extend from one pole to the other. 
D)  Kinetochore microtubules form before polar microtubules. 
E)  There is no difference;they are both names for the same structure.

Question 16

At the end of the first meiotic division,each chromosome consists of

Accepted Answer

A)  chiasmata. 
B)  a homologous chromosome pair. 
C)  four copies of each DNA molecule. 
D)  two chromatids. 
E)  a pair of polar microtubules. 
A)  chiasmata. 
B)  a homologous chromosome pair. 
C)  four copies of each DNA molecule. 
D)  two chromatids. 
E)  a pair of polar microtubules.

Question 17

Which process increases the genetic diversity of offspring?

Accepted Answer

A)  Mitosis 
B)  Cloning 
C)  Sexual reproduction 
D)  Cytokinesis 
E)  Fission 
A)  Mitosis 
B)  Cloning 
C)  Sexual reproduction 
D)  Cytokinesis 
E)  Fission

Question 18

In an organism with a haploid number of 9,a skin cell has _______ chromosomes,a sperm cell at meiotic anaphase II has _______ chromosomes,and a newly formed zygote has _______ chromosomes.

Accepted Answer

A)  18;18;18 
B)  9;9;9 
C)  9;18;9 
D)  18;9;9 
E)  18;9;18 
A)  18;18;18 
B)  9;9;9 
C)  9;18;9 
D)  18;9;9 
E)  18;9;18

Question 19

Which statement about cervical cancer,a relatively common cancer,is false?

Accepted Answer

A)  It can be detected early by a PAP test. 
B)  It is usually caused by human papillomavirus (HPV). 
C)  It infects the cervical cells with viral DNA. 
D)  The HPV that infects cervical tissue spreads by sexual transmission. 
E)  It is never fatal. 
A)  It can be detected early by a PAP test. 
B)  It is usually caused by human papillomavirus (HPV). 
C)  It infects the cervical cells with viral DNA. 
D)  The HPV that infects cervical tissue spreads by sexual transmission. 
E)  It is never fatal.

Question 20

A triploid nucleus cannot undergo meiosis because

Accepted Answer

A)  the DNA cannot replicate. 
B)  not all of the chromosomes can form homologous pairs. 
C)  the sister chromatids cannot separate. 
D)  cytokinesis cannot occur. 
E)  a cell plate cannot form. 
A)  the DNA cannot replicate. 
B)  not all of the chromosomes can form homologous pairs. 
C)  the sister chromatids cannot separate. 
D)  cytokinesis cannot occur. 
E)  a cell plate cannot form.

Exam 7: The Cell Cycle and Cell Division

The uncondensed length of human DNA found in chromosomes is _______,whereas a typical cell is 10 μ\muμ m in length.

Which statement about plant cytokinesis is true?

The cell division process that ensures that only one of each pair of chromosomes is included in a gamete is called _______.

In mitotic metaphase,a cell with eight sister chromatids has _______ centromere(s).

The haploid number in Drosophila melanogaster is 4.How many chromosomes would a trisomic individual have?

Accidents during meiosis that can result in trisomies and monosomies are called

Which statement about homologous chromosome pairs is false?

When the cyclin‒CDK complex phosphorylates RB,the cell cycle progresses from _______ to _______.

During asexual reproduction,the genetic material of the parent is passed on to the offspring by

A bacterial cell gives rise to two genetically identical daughter cells by a process known as

The members of a homologous pair of chromosomes in a sexually reproducing organism

The event in the cell division process that clearly involves microfilaments is

Which statement about sexual and asexual reproduction is true?

Asexual reproduction produces genetically identical individuals because

Which statement correctly distinguishes kinetochore microtubules from polar microtubules?

At the end of the first meiotic division,each chromosome consists of

Which process increases the genetic diversity of offspring?

In an organism with a haploid number of 9,a skin cell has _______ chromosomes,a sperm cell at meiotic anaphase II has _______ chromosomes,and a newly formed zygote has _______ chromosomes.

Which statement about cervical cancer,a relatively common cancer,is false?

A triploid nucleus cannot undergo meiosis because

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

The uncondensed length of human DNA found in chromosomes is _______,whereas a typical cell is 10 $\mu$ m in length.

When the cyclin‒CDK complex phosphorylates RB,the cell cycle progresses from _ to _.

In an organism with a haploid number of 9,a skin cell has ___ chromosomes,a sperm cell at meiotic anaphase II has _ chromosomes,and a newly formed zygote has _____ chromosomes.