Question 1

A protein on the surface of cytotoxic lymphocytes can elicit self-destruct mechanisms in target cells by interacting with

Accepted Answer

A) TGFβ receptors. 
B) Death receptors. 
C) EGF receptors. 
D) Bcl-2. 
E) procaspase 3. 
A) TGFβ receptors. 
B) Death receptors. 
C) EGF receptors. 
D) Bcl-2. 
E) procaspase 3.

Question 2

Dividing adult eukaryotic cells spend most of their time in which of the following?

Accepted Answer

A) metaphase 
B) prophase 
C) telophase 
D) interphase 
E) anaphase 
A) metaphase 
B) prophase 
C) telophase 
D) interphase 
E) anaphase

Question 3

During the cell cycle,MPF activity

Accepted Answer

A) peaks in S and decreases in G2. 
B) peaks in G2 and decreases in G1. 
C) peaks in M and decrease in M. 
D) peaks in M and decreases at the restriction point. 
E) peaks in G1 and decreases in G2. 
A) peaks in S and decreases in G2. 
B) peaks in G2 and decreases in G1. 
C) peaks in M and decrease in M. 
D) peaks in M and decreases at the restriction point. 
E) peaks in G1 and decreases in G2.

Question 4

In the cell cycle,a mitotic Cdk is present during

Accepted Answer

A) G1. 
B) G2. 
C) M) 
D) S) 
E) All of the above phases are present in the cell cycle. 
A) G1. 
B) G2. 
C) M) 
D) S) 
E) All of the above phases are present in the cell cycle.

Question 5

Movement of sister chromatids back and forth during prometaphase is known as ________.

Accepted Answer

The answer of Movement of sister chromatids back and forth...

Question 6

Each of the following is an activity of a microtubule motor protein during mitosis except

Accepted Answer

A) shortening kinetochore microtubules. 
B) pulling kinetochore microtubules in at centrosomes. 
C) pushing interpolar microtubules for anaphase B. 
D) pulling astral microtubules toward the cell cortex. 
E) All of the above are activities of microtubule motors. 
A) shortening kinetochore microtubules. 
B) pulling kinetochore microtubules in at centrosomes. 
C) pushing interpolar microtubules for anaphase B. 
D) pulling astral microtubules toward the cell cortex. 
E) All of the above are activities of microtubule motors.

Question 7

Which of the following pathways is affected in ced mutants of C.elegans?

Accepted Answer

A) mitogen signaling 
B) apoptosis 
C) cell cycle 
D) terminal differentiation 
E) stem cell division 
A) mitogen signaling 
B) apoptosis 
C) cell cycle 
D) terminal differentiation 
E) stem cell division

Question 8

Caspases are produced as inactive precursors known as ________.

Accepted Answer

The answer of Caspases are produced as inactive precursors known...

Question 9

Each of the following is involved in DNA replication licensing during S phase except

Accepted Answer

A) geminin. 
B) ORC. 
C) MCM proteins. 
D) helicase loaders. 
E) CENP-A. 
A) geminin. 
B) ORC. 
C) MCM proteins. 
D) helicase loaders. 
E) CENP-A.

Question 10

In a dividing fruit fly cell lacking components of the centralspindlin complex,

Accepted Answer

A) the nuclear envelope remains intact. 
B) the centrosome fails to duplicate. 
C) sister chromatids fail to separate for anaphase A. 
D) no anaphase B occurs. 
E) cytokinesis begins,but the cleavage furrow regresses. 
A) the nuclear envelope remains intact. 
B) the centrosome fails to duplicate. 
C) sister chromatids fail to separate for anaphase A. 
D) no anaphase B occurs. 
E) cytokinesis begins,but the cleavage furrow regresses.

Question 11

Specific control points that are sensitive to extracellular conditions regulate G1-S transition in eukaryotic cells.Passage through the yeast Start point requires sufficient ________,whereas passage through the animal cell restriction point requires the presence of ________.

Accepted Answer

nutrients;

Question 12

Genomic DNA is replicated during which of the following cell-cycle phases?

Accepted Answer

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

Question 13

Which of the following correctly orders the stages of mitosis?

Accepted Answer

A) prophase - anaphase - prometaphase - metaphase - telophase 
B) telophase - prometaphase - prophase - metaphase - anaphase 
C) prometaphase - metaphase - anaphase - prophase - telophase 
D) prophase - prometaphase - metaphase - anaphase - telophase 
E) anaphase - prometaphase - metaphase - prophase - telophase 
A) prophase - anaphase - prometaphase - metaphase - telophase 
B) telophase - prometaphase - prophase - metaphase - anaphase 
C) prometaphase - metaphase - anaphase - prophase - telophase 
D) prophase - prometaphase - metaphase - anaphase - telophase 
E) anaphase - prometaphase - metaphase - prophase - telophase

Question 14

Animal cell centrosome MTOCs contain

Accepted Answer

A) condensins. 
B) cyclin-Cdk. 
C) centrioles. 
D) mitochondria. 
E) phragmoplasts. 
A) condensins. 
B) cyclin-Cdk. 
C) centrioles. 
D) mitochondria. 
E) phragmoplasts.

Question 15

Following DNA replication,the attached copies of each chromosome are called ________.

Accepted Answer

The answer of Following DNA replication,the attached copies of each...

Question 16

Chromosome condensation indicates a cell has entered

Accepted Answer

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

Question 17

Each of the following involves apoptosis except

Accepted Answer

A) removing webbing between digits during development. 
B) decreasing neurons during brain development. 
C) destroying pathogen-infected cells. 
D) removing white blood cells at the end of their life span. 
E) generating a cancerous tumor. 
A) removing webbing between digits during development. 
B) decreasing neurons during brain development. 
C) destroying pathogen-infected cells. 
D) removing white blood cells at the end of their life span. 
E) generating a cancerous tumor.

Question 18

Proteins bound to CEN sequences form a complex known as the ________.

Accepted Answer

The answer of Proteins bound to CEN sequences form a...

Question 19

A particular haploid strain of yeast contains a temperature-sensitive mutation in its cdc2 gene resulting in no functional Cdc2 protein at the nonpermissive temperature.At the nonpermissive temperature,each of the following events would fail to occur at the appropriate cell cycle stage except

Accepted Answer

A) replication of DNA. 
B) fragmentation of the nuclear envelope. 
C) condensation of chromosomes. 
D) appearance of the mitotic spindle. 
E) prevention of fusion of chromosome ends. 
A) replication of DNA. 
B) fragmentation of the nuclear envelope. 
C) condensation of chromosomes. 
D) appearance of the mitotic spindle. 
E) prevention of fusion of chromosome ends.

Question 20

The multiple sites of DNA replication along eukaryotic chromosomes are known as

Accepted Answer

A) replicons. 
B) centromeres. 
C) telomeres. 
D) plasmodesmata. 
E) targets of rapamycin. 
A) replicons. 
B) centromeres. 
C) telomeres. 
D) plasmodesmata. 
E) targets of rapamycin.

Exam 24: The Cell Cycle and Mitosis

A protein on the surface of cytotoxic lymphocytes can elicit self-destruct mechanisms in target cells by interacting with

Dividing adult eukaryotic cells spend most of their time in which of the following?

During the cell cycle,MPF activity

In the cell cycle,a mitotic Cdk is present during

Movement of sister chromatids back and forth during prometaphase is known as ________.

Each of the following is an activity of a microtubule motor protein during mitosis except

Which of the following pathways is affected in ced mutants of C.elegans?

Caspases are produced as inactive precursors known as ________.

Each of the following is involved in DNA replication licensing during S phase except

In a dividing fruit fly cell lacking components of the centralspindlin complex,

Specific control points that are sensitive to extracellular conditions regulate G1-S transition in eukaryotic cells.Passage through the yeast Start point requires sufficient ________,whereas passage through the animal cell restriction point requires the presence of ________.

Genomic DNA is replicated during which of the following cell-cycle phases?

Which of the following correctly orders the stages of mitosis?

Animal cell centrosome MTOCs contain

Following DNA replication,the attached copies of each chromosome are called ________.

Chromosome condensation indicates a cell has entered

Each of the following involves apoptosis except

Proteins bound to CEN sequences form a complex known as the ________.

A particular haploid strain of yeast contains a temperature-sensitive mutation in its cdc2 gene resulting in no functional Cdc2 protein at the nonpermissive temperature.At the nonpermissive temperature,each of the following events would fail to occur at the appropriate cell cycle stage except

The multiple sites of DNA replication along eukaryotic chromosomes are known as

A Preview of Cell Biology

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure,function,and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: Dna, chromosomes, and the Nucleus

DNA Replication, repair, and Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Molecular Biology Techniques for Cell Biology

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Sexual Reproduction,meiosis,and Genetic Recombination

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Specific control points that are sensitive to extracellular conditions regulate G1-S transition in eukaryotic cells.Passage through the yeast Start point requires sufficient ,whereas passage through the animal cell restriction point requires the presence of .