Question 1

Phosphorylation of the Golgi matrix proteins by Cdk1 during mitosis

Accepted Answer

A)  mediates breakdown of the Golgi apparatus into vesicles. 
B)  activates proteins to degrade the Golgi proteins. 
C)  inhibits association of the Golgi with microtubules. 
D)  causes microtubules to pull the Golgi into two parts. 
A)  mediates breakdown of the Golgi apparatus into vesicles. 
B)  activates proteins to degrade the Golgi proteins. 
C)  inhibits association of the Golgi with microtubules. 
D)  causes microtubules to pull the Golgi into two parts.

Question 2

Cell plate formation occurs only in _______ cells.

Accepted Answer

The answer of Cell plate formation occurs only in _______...

Question 3

The p21 and p15 proteins are examples of

Accepted Answer

A)  Cdk inhibitors. 
B)  cyclins. 
C)  oncogenes. 
D)  growth factors. 
A)  Cdk inhibitors. 
B)  cyclins. 
C)  oncogenes. 
D)  growth factors.

Question 4

The passage of a cell through the stages of the cell cycle is controlled by protein kinases that phosphorylate many different proteins at appropriate times. What are these protein kinases called?

Accepted Answer

A)  Cdk activating kinases 
B)  Cyclin-dependent kinases 
C)  Cyclins 
D)  Tyrosine kinases 
A)  Cdk activating kinases 
B)  Cyclin-dependent kinases 
C)  Cyclins 
D)  Tyrosine kinases

Question 5

Which of the following represents the amount of DNA in a typical G2 cell?

Accepted Answer

A)  n 
B)  2n 
C)  4n 
D)  8n 
A)  n 
B)  2n 
C)  4n 
D)  8n

Question 6

Cells are restricted to one round of DNA replication per cycle by origin of replication binding proteins called

Accepted Answer

A)  ATMs. 
B)  Akts. 
C)  Oris. 
D)  MCMs. 
A)  ATMs. 
B)  Akts. 
C)  Oris. 
D)  MCMs.

Question 7

Separation of anaphase chromosomes begins when _______ is degraded to break the link between sister chromatids.

Accepted Answer

The answer of Separation of anaphase chromosomes begins when _______...

Question 8

A mutant cyclin B that is resistant to degradation by protease, but is otherwise active, would block the metaphase-to-anaphase transition.

Accepted Answer

A) True 
 B)False

Question 9

Cytokinesis begins during the _______ stage of mitosis.

Accepted Answer

The answer of Cytokinesis begins during the _______ stage of...

Question 10

Progression through the cell cycle in the yeast Saccharomyces cerevisiae is regulated by

Accepted Answer

A)  external signals such as availability of nutrients and mating factors. 
B)  internal signals such as growth factors and steroid hormones. 
C)  internal signals such as the availability of glucose and ATP. 
D)  simple organisms such as yeast do not have a cell cycle. 
A)  external signals such as availability of nutrients and mating factors. 
B)  internal signals such as growth factors and steroid hormones. 
C)  internal signals such as the availability of glucose and ATP. 
D)  simple organisms such as yeast do not have a cell cycle.

Question 11

During G2, the Wee1 protein phosphorylates tyrosine-15 of the Cdc2 protein kinase, thus inactivating it. Only once dephosphorylation occurs and Cdc2 becomes active can the cell pass from G2 into M and proceed to cell division. Can you think of a reason why this protein was named Wee1?

Accepted Answer

G₂ is a period in the cell cycle during w

Question 12

MPF is a

Accepted Answer

A)  monomeric protein kinase. 
B)  dimer of two molecules of Cdk1. 
C)  dimer of Cdk1 and cyclin A. 
D)  dimer of Cdk1 and cyclin B. 
A)  monomeric protein kinase. 
B)  dimer of two molecules of Cdk1. 
C)  dimer of Cdk1 and cyclin A. 
D)  dimer of Cdk1 and cyclin B.

Question 13

The most variable phase of the cell cycle is _______.

Accepted Answer

The answer of The most variable phase of the cell...

Question 14

Maturation promotion factor (MPF), discovered by Masui and Markert, is the factor that

Accepted Answer

A)  is missing in the cdc2 mutant in yeast. 
B)  induces entry into meiosis when injected into frog oocytes. 
C)  fluctuates in amount during early cleavages of sea urchin eggs. 
D)  fluctuates in amount during the cell cycle of mammalian cells. 
A)  is missing in the cdc2 mutant in yeast. 
B)  induces entry into meiosis when injected into frog oocytes. 
C)  fluctuates in amount during early cleavages of sea urchin eggs. 
D)  fluctuates in amount during the cell cycle of mammalian cells.

Question 15

Many cancer researchers and tumor biologists focus their studies on regulation of the cell cycle. Why?

Accepted Answer

When cancer begins to run unch

Question 16

DNA content can be found using a method of flow cytometry that can determine 2n or 4n states of cells based on cell counting and fluorescent labeling of DNA. Which of the following phases would be identified through flow cytometry as 2n?

Accepted Answer

A)  G1 phase only 
B)  S phase only 
C)  G2 phase only 
D)  Both G2 and M phases 
A)  G1 phase only 
B)  S phase only 
C)  G2 phase only 
D)  Both G2 and M phases

Question 17

MPF is a general regulator of the transition from

Accepted Answer

A)  G1 to S. 
B)  S to G2. 
C)  G2 to M. 
D)  metaphase to anaphase. 
A)  G1 to S. 
B)  S to G2. 
C)  G2 to M. 
D)  metaphase to anaphase.

Question 18

To prevent cells with unreplicated DNA from passing through the G2 checkpoint, Chk1 and Chk2 _______ protein phosphatase Cdc25.

Accepted Answer

A)  phosphorylate and stimulate 
B)  phosphorylate and inhibit 
C)  dephosphorylate and stimulate 
D)  dephosphorylate and induce the degradation of 
A)  phosphorylate and stimulate 
B)  phosphorylate and inhibit 
C)  dephosphorylate and stimulate 
D)  dephosphorylate and induce the degradation of

Question 19

Interphase is defined as

Accepted Answer

A)  the G1 and G2 phases. 
B)  the G1, G2, and S phases. 
C)  G0, the quiescent phase. 
D)  M phase. 
A)  the G1 and G2 phases. 
B)  the G1, G2, and S phases. 
C)  G0, the quiescent phase. 
D)  M phase.

Question 20

During mitosis, the rate of microtubule turnover

Accepted Answer

A)  decreases. 
B)  stays the same. 
C)  doubles. 
D)  increases five- to tenfold. 
A)  decreases. 
B)  stays the same. 
C)  doubles. 
D)  increases five- to tenfold.

Phosphorylation of the Golgi matrix proteins by Cdk1 during mitosis

Cell plate formation occurs only in _______ cells.

The p21 and p15 proteins are examples of

The passage of a cell through the stages of the cell cycle is controlled by protein kinases that phosphorylate many different proteins at appropriate times. What are these protein kinases called?

Which of the following represents the amount of DNA in a typical G₂ cell?

Cells are restricted to one round of DNA replication per cycle by origin of replication binding proteins called

Separation of anaphase chromosomes begins when _______ is degraded to break the link between sister chromatids.

A mutant cyclin B that is resistant to degradation by protease, but is otherwise active, would block the metaphase-to-anaphase transition.

Cytokinesis begins during the _______ stage of mitosis.

Progression through the cell cycle in the yeast Saccharomyces cerevisiae is regulated by

During G₂, the Wee1 protein phosphorylates tyrosine-15 of the Cdc2 protein kinase, thus inactivating it. Only once dephosphorylation occurs and Cdc2 becomes active can the cell pass from G₂ into M and proceed to cell division. Can you think of a reason why this protein was named Wee1?

MPF is a

The most variable phase of the cell cycle is _______.

Maturation promotion factor (MPF), discovered by Masui and Markert, is the factor that

Many cancer researchers and tumor biologists focus their studies on regulation of the cell cycle. Why?

DNA content can be found using a method of flow cytometry that can determine 2n or 4n states of cells based on cell counting and fluorescent labeling of DNA. Which of the following phases would be identified through flow cytometry as 2n?

MPF is a general regulator of the transition from

To prevent cells with unreplicated DNA from passing through the G₂ checkpoint, Chk1 and Chk2 _______ protein phosphatase Cdc25.

Interphase is defined as

During mitosis, the rate of microtubule turnover

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

Cell Death and Cell Renewal

Cancer

Filters

Exam 18: The Cell Cycle

Phosphorylation of the Golgi matrix proteins by Cdk1 during mitosis

Cell plate formation occurs only in _______ cells.

The p21 and p15 proteins are examples of

The passage of a cell through the stages of the cell cycle is controlled by protein kinases that phosphorylate many different proteins at appropriate times. What are these protein kinases called?

Which of the following represents the amount of DNA in a typical G2 cell?

Cells are restricted to one round of DNA replication per cycle by origin of replication binding proteins called

Separation of anaphase chromosomes begins when _______ is degraded to break the link between sister chromatids.

A mutant cyclin B that is resistant to degradation by protease, but is otherwise active, would block the metaphase-to-anaphase transition.

Cytokinesis begins during the _______ stage of mitosis.

Progression through the cell cycle in the yeast Saccharomyces cerevisiae is regulated by

During G2, the Wee1 protein phosphorylates tyrosine-15 of the Cdc2 protein kinase, thus inactivating it. Only once dephosphorylation occurs and Cdc2 becomes active can the cell pass from G2 into M and proceed to cell division. Can you think of a reason why this protein was named Wee1?

MPF is a

The most variable phase of the cell cycle is _______.

Maturation promotion factor (MPF), discovered by Masui and Markert, is the factor that

Many cancer researchers and tumor biologists focus their studies on regulation of the cell cycle. Why?

DNA content can be found using a method of flow cytometry that can determine 2n or 4n states of cells based on cell counting and fluorescent labeling of DNA. Which of the following phases would be identified through flow cytometry as 2n?

MPF is a general regulator of the transition from

To prevent cells with unreplicated DNA from passing through the G2 checkpoint, Chk1 and Chk2 _______ protein phosphatase Cdc25.

Interphase is defined as

During mitosis, the rate of microtubule turnover

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

Cell Death and Cell Renewal

Cancer

Filters

Which of the following represents the amount of DNA in a typical G₂ cell?

During G₂, the Wee1 protein phosphorylates tyrosine-15 of the Cdc2 protein kinase, thus inactivating it. Only once dephosphorylation occurs and Cdc2 becomes active can the cell pass from G₂ into M and proceed to cell division. Can you think of a reason why this protein was named Wee1?

To prevent cells with unreplicated DNA from passing through the G₂ checkpoint, Chk1 and Chk2 _______ protein phosphatase Cdc25.