Question 1

The sunburst arrangement of microtubules that forms around each centrosome during early prophase is called a(n)________.

Accepted Answer

A) sunburst 
B) arnost 
C) aster 
D) astral fiber 
E) barrel 
A) sunburst 
B) arnost 
C) aster 
D) astral fiber 
E) barrel C

Question 2

What activates condensin at the onset of mitosis?

Accepted Answer

A) Na+ ions 
B) phosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G2 into mitosis 
C) phosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G1 into mitosis 
D) phosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G1 into S phase 
E) dephosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G2 into mitosis 
A) Na+ ions 
B) phosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G2 into mitosis 
C) phosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G1 into mitosis 
D) phosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G1 into S phase 
E) dephosphorylation of several of its subunits by the Cdk-cyclin that drives cells from G2 into mitosis B

Question 3

In the human female,when is prophase I of meiosis initiated?

Accepted Answer

A) at puberty 
B) prior to birth 
C) between the ages of 4 and 6 
D) at the beginning of each menstrual cycle 
E) at the end of each menstrual cycle 
A) at puberty 
B) prior to birth 
C) between the ages of 4 and 6 
D) at the beginning of each menstrual cycle 
E) at the end of each menstrual cycle B

Question 4

What stage of prophase I is usually recognized by the dissolution of the synaptonemal complex and the tendency of homologous chromosomes of the bivalents to pull away somewhat from each other?

Accepted Answer

A) pachytene 
B) leptotene 
C) diakinesis 
D) zygotene 
E) diplotene 
A) pachytene 
B) leptotene 
C) diakinesis 
D) zygotene 
E) diplotene

Question 5

In fission yeast cells,at which sites is replication initiated?

Accepted Answer

A) at randomly selected sites 
B) at sites where histones bind 
C) at sites where prereplication complexes have previously assembled 
D) at sites where RNA polymerase binds 
E) at sites that bind nucleosomes bind 
A) at randomly selected sites 
B) at sites where histones bind 
C) at sites where prereplication complexes have previously assembled 
D) at sites where RNA polymerase binds 
E) at sites that bind nucleosomes bind

Question 6

What property below do stem cells not share with most cells?

Accepted Answer

A) They exhibit asymmetric cell division. 
B) They do not replicate their DNA before cell division. 
C) The two daughter cells have different properties or fates. 
D) They exhibit symmetric cell division. 
E) They exhibit asymmetric cell division and the two daughter cells have different properties or fates. 
A) They exhibit asymmetric cell division. 
B) They do not replicate their DNA before cell division. 
C) The two daughter cells have different properties or fates. 
D) They exhibit symmetric cell division. 
E) They exhibit asymmetric cell division and the two daughter cells have different properties or fates.

Question 7

During which phase of meiosis do the kinetochores of sister chromatids face opposite poles as they line up in the center of the cells? The centromeres of sister chromatids become attached to chromosomal spindle fibers from opposite spindle poles.

Accepted Answer

A) prophase II 
B) metaphase II 
C) anaphase II 
D) metaphase I 
E) telophase II 
A) prophase II 
B) metaphase II 
C) anaphase II 
D) metaphase I 
E) telophase II

Question 8

What is the event that begins prometaphase?

Accepted Answer

A) the complete compaction of the chromosomes 
B) the disappearance of the nucleolus 
C) the dissolution of the nuclear envelope 
D) the reappearance of the nucleolus 
E) the completion of the connection of chromosomes to the spindle 
A) the complete compaction of the chromosomes 
B) the disappearance of the nucleolus 
C) the dissolution of the nuclear envelope 
D) the reappearance of the nucleolus 
E) the completion of the connection of chromosomes to the spindle

Question 9

What evidence suggests that a cell spends the majority of its time in interphase?

Accepted Answer

A) Interphase is more useful. 
B) Only a small percentage of cells in a tissue or cell culture are seen to be in mitosis at any given time. 
C) A large percentage of cells in a tissue or cell culture are seen to be in mitosis at any given time. 
D) A moderate percentage of cells in a tissue or cell culture are seen to be in mitosis at any given time. 
E) Mitosis is too intricate a process to last very long. 
A) Interphase is more useful. 
B) Only a small percentage of cells in a tissue or cell culture are seen to be in mitosis at any given time. 
C) A large percentage of cells in a tissue or cell culture are seen to be in mitosis at any given time. 
D) A moderate percentage of cells in a tissue or cell culture are seen to be in mitosis at any given time. 
E) Mitosis is too intricate a process to last very long.

Question 10

Microtubules are nucleated in cells with centrosomes in the vicinity of the centrosomes.Where do they nucleate in cells lacking centrosomes?

Accepted Answer

A) in the vicinity of the nucleolus 
B) in the vicinity of the mitochondria 
C) in the vicinity of the chromosomes 
D) in the vicinity of the cell membrane 
E) in the vicinity of the lysosomes 
A) in the vicinity of the nucleolus 
B) in the vicinity of the mitochondria 
C) in the vicinity of the chromosomes 
D) in the vicinity of the cell membrane 
E) in the vicinity of the lysosomes

Question 11

Which cells typically have cell cycles lasting several months?

Accepted Answer

A) cells in a cleaving frog embryo 
B) mammalian liver tissue 
C) mammalian embryo cells 
D) both cells in a cleaving frog embryo and mammalian embryo cells 
E) nerve cells 
A) cells in a cleaving frog embryo 
B) mammalian liver tissue 
C) mammalian embryo cells 
D) both cells in a cleaving frog embryo and mammalian embryo cells 
E) nerve cells

Question 12

The start of centrosome duplication begins at the ______ transition.

Accepted Answer

A) M-G1 
B) G1-S 
C) S-G2 
D) G2-M 
E) G1-M 
A) M-G1 
B) G1-S 
C) S-G2 
D) G2-M 
E) G1-M

Question 13

What types of non-stem cells below also engage in asymmetric or unequal divisions?

Accepted Answer

A) formation of oocytes and polar bodies 
B) formation of spermatogonia 
C) division of the T cell 
D) division of the B cell 
E) both formation of oocytes and polar bodies and division of the T cell 
A) formation of oocytes and polar bodies 
B) formation of spermatogonia 
C) division of the T cell 
D) division of the B cell 
E) both formation of oocytes and polar bodies and division of the T cell

Question 14

What event marks the end of zygotene?

Accepted Answer

A) the beginning of synapsis 
B) the beginning of genetic recombination 
C) the end of synapsis 
D) the start of metaphase 
E) the formation of the synaptonemal complex 
A) the beginning of synapsis 
B) the beginning of genetic recombination 
C) the end of synapsis 
D) the start of metaphase 
E) the formation of the synaptonemal complex

Question 15

The period in the cell cycle between the end of dell division and the beginning of DNA synthesis is called the _____ phase.

Accepted Answer

A) G1 
B) S 
C) G2 
D) M 
E) G0 
A) G1 
B) S 
C) G2 
D) M 
E) G0

Question 16

Based on cell activities readily visible in the light microscope,there are two major cell cycle phases,________ and __________.

Accepted Answer

A) M phase,cytokinesis 
B) interphase,cytokinesis 
C) M phase,C phase 
D) M phase,interphase 
E) C phase,interphase 
A) M phase,cytokinesis 
B) interphase,cytokinesis 
C) M phase,C phase 
D) M phase,interphase 
E) C phase,interphase

Question 17

As revealed by recent studies,which organelles do not seem to remain intact during mitosis?

Accepted Answer

A) mitochondria 
B) Golgi complex 
C) ER 
D) peroxisomes 
E) chloroplasts 
A) mitochondria 
B) Golgi complex 
C) ER 
D) peroxisomes 
E) chloroplasts

Question 18

What is the name of the enzyme that responds to the lack of bipolar tension when both chromatids are attached to microtubules from the same spindle pole and helps to correct the abnormality?

Accepted Answer

A) streptokinase 
B) Aurora B kinase 
C) Cdc kinase 
D) protein kinase 
E) tubulin kinase 
A) streptokinase 
B) Aurora B kinase 
C) Cdc kinase 
D) protein kinase 
E) tubulin kinase

Question 19

What initiates the disassembly of the three major components of the nuclear envelope?

Accepted Answer

A) phosphorylation of key substrates by mitotic kinases,particularly cyclin B-Cdk1 
B) dephosphorylation of key substrates by mitotic phosphatases,particularly cyclin B-Cdk1 
C) a cascade begun by ATP synthase 
D) phosphorylation of key substrates by mitotic phosphatases,particularly cyclin B-Cdk 
E) methylation of key substrates by mitotic kinases,particularly cyclin B-Cdk1 
A) phosphorylation of key substrates by mitotic kinases,particularly cyclin B-Cdk1 
B) dephosphorylation of key substrates by mitotic phosphatases,particularly cyclin B-Cdk1 
C) a cascade begun by ATP synthase 
D) phosphorylation of key substrates by mitotic phosphatases,particularly cyclin B-Cdk 
E) methylation of key substrates by mitotic kinases,particularly cyclin B-Cdk1

Question 20

During which stage of prophase I does the bulk of oocyte growth occur?

Accepted Answer

A) pachytene 
B) leptotene 
C) diakinesis 
D) zygotene 
E) diplotene 
A) pachytene 
B) leptotene 
C) diakinesis 
D) zygotene 
E) diplotene

The sunburst arrangement of microtubules that forms around each centrosome during early prophase is called a(n)________.

What activates condensin at the onset of mitosis?

In the human female,when is prophase I of meiosis initiated?

What stage of prophase I is usually recognized by the dissolution of the synaptonemal complex and the tendency of homologous chromosomes of the bivalents to pull away somewhat from each other?

In fission yeast cells,at which sites is replication initiated?

What property below do stem cells not share with most cells?

During which phase of meiosis do the kinetochores of sister chromatids face opposite poles as they line up in the center of the cells? The centromeres of sister chromatids become attached to chromosomal spindle fibers from opposite spindle poles.

What is the event that begins prometaphase?

What evidence suggests that a cell spends the majority of its time in interphase?

Microtubules are nucleated in cells with centrosomes in the vicinity of the centrosomes.Where do they nucleate in cells lacking centrosomes?

Which cells typically have cell cycles lasting several months?

The start of centrosome duplication begins at the ______ transition.

What types of non-stem cells below also engage in asymmetric or unequal divisions?

What event marks the end of zygotene?

The period in the cell cycle between the end of dell division and the beginning of DNA synthesis is called the _____ phase.

Based on cell activities readily visible in the light microscope,there are two major cell cycle phases, and __.

As revealed by recent studies,which organelles do not seem to remain intact during mitosis?

What is the name of the enzyme that responds to the lack of bipolar tension when both chromatids are attached to microtubules from the same spindle pole and helps to correct the abnormality?

What initiates the disassembly of the three major components of the nuclear envelope?

During which stage of prophase I does the bulk of oocyte growth occur?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 14: Cellular Reproduction

The sunburst arrangement of microtubules that forms around each centrosome during early prophase is called a(n)________.

What activates condensin at the onset of mitosis?

In the human female,when is prophase I of meiosis initiated?

What stage of prophase I is usually recognized by the dissolution of the synaptonemal complex and the tendency of homologous chromosomes of the bivalents to pull away somewhat from each other?

In fission yeast cells,at which sites is replication initiated?

What property below do stem cells not share with most cells?

During which phase of meiosis do the kinetochores of sister chromatids face opposite poles as they line up in the center of the cells? The centromeres of sister chromatids become attached to chromosomal spindle fibers from opposite spindle poles.

What is the event that begins prometaphase?

What evidence suggests that a cell spends the majority of its time in interphase?

Microtubules are nucleated in cells with centrosomes in the vicinity of the centrosomes.Where do they nucleate in cells lacking centrosomes?

Which cells typically have cell cycles lasting several months?

The start of centrosome duplication begins at the ______ transition.

What types of non-stem cells below also engage in asymmetric or unequal divisions?

What event marks the end of zygotene?

The period in the cell cycle between the end of dell division and the beginning of DNA synthesis is called the _____ phase.

Based on cell activities readily visible in the light microscope,there are two major cell cycle phases,________ and __________.

As revealed by recent studies,which organelles do not seem to remain intact during mitosis?

What is the name of the enzyme that responds to the lack of bipolar tension when both chromatids are attached to microtubules from the same spindle pole and helps to correct the abnormality?

What initiates the disassembly of the three major components of the nuclear envelope?

During which stage of prophase I does the bulk of oocyte growth occur?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Based on cell activities readily visible in the light microscope,there are two major cell cycle phases, and __.