Question 1

What usually happens to vertebrate eggs immediately after they have been fertilized?

Accepted Answer

A) Cytokinesis begins. 
B) They start to grow. 
C) Mitosis begins. 
D) Meiosis is completed. 
E) The egg sheds lots of cytoplasm. 
A) Cytokinesis begins. 
B) They start to grow. 
C) Mitosis begins. 
D) Meiosis is completed. 
E) The egg sheds lots of cytoplasm.

Question 2

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

Question 3

What may be the purpose of the clustering of telomeres in a variety of eukaryotic cells that presumably causes chromosomes to look like a flower bouquet?

Accepted Answer

A) It may terminate synapsis. 
B) It may facilitate chromosome alignment in preparation for synapsis. 
C) It may prevent chromosome alignment until synapsis begins. 
D) It may spread chromosomes out in preparation for synapsis. 
E) It may start the dissolution of the nuclear envelope. 
A) It may terminate synapsis. 
B) It may facilitate chromosome alignment in preparation for synapsis. 
C) It may prevent chromosome alignment until synapsis begins. 
D) It may spread chromosomes out in preparation for synapsis. 
E) It may start the dissolution of the nuclear envelope.

Question 4

What triggers the entry of a cell into mitosis?

Accepted Answer

A) the addition of inhibitory phosphate groups to Cdk1 by the Cdc25 phosphatase 
B) the removal of inhibitory phosphate groups from Cdk1 by the Cdc25 phosphatase 
C) the addition of inhibitory phosphate groups to Cdk1 by the Wee1 kinase 
D) the removal of inhibitory phosphate groups from Cdk1 by the Wee1 kinase 
E) the removal of phosphate groups from the Wee1 kinase 
A) the addition of inhibitory phosphate groups to Cdk1 by the Cdc25 phosphatase 
B) the removal of inhibitory phosphate groups from Cdk1 by the Cdc25 phosphatase 
C) the addition of inhibitory phosphate groups to Cdk1 by the Wee1 kinase 
D) the removal of inhibitory phosphate groups from Cdk1 by the Wee1 kinase 
E) the removal of phosphate groups from the Wee1 kinase

Question 5

Organisms in which meiotic divisions are closely linked to gamete formation,as in the case where meiosis occurs just prior to the differentiation of the spermatozoa,exhibit ___________.

Accepted Answer

A) initial meiosis 
B) terminal meiosis 
C) zygotic meiosis 
D) sporic meiosis 
E) intermediate meiosis 
A) initial meiosis 
B) terminal meiosis 
C) zygotic meiosis 
D) sporic meiosis 
E) intermediate meiosis

Question 6

How would you describe the orientation of the two centrioles of the centrosome relative to each other?

Accepted Answer

A) oriented at right angles 
B) oriented in the same direction 
C) obverse 
D) reversed 
E) converse 
A) oriented at right angles 
B) oriented in the same direction 
C) obverse 
D) reversed 
E) converse

Question 7

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 8

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 9

What multiprotein complex has recently been shown to play a significant role in chromosome compaction?

Accepted Answer

A) compressin 
B) condensin 
C) elastin 
D) loopin 
E) mitosin 
A) compressin 
B) condensin 
C) elastin 
D) loopin 
E) mitosin

Question 10

What appears to be responsible for the tighter adhesion between chromosomes seen at centromeres rather than along the chromosome arms?

Accepted Answer

A) elevated phosphorylation 
B) a kinase found at the centromere that phosphorylates cohesin 
C) a phosphatase found at the centromere that removes phosphate groups from cohesin if they are added 
D) a phosphatase found in the chromosome arms that removes phosphate groups from cohesin 
E) a phosphatase found in the chromosome arms that adds phosphate groups to cohesin 
A) elevated phosphorylation 
B) a kinase found at the centromere that phosphorylates cohesin 
C) a phosphatase found at the centromere that removes phosphate groups from cohesin if they are added 
D) a phosphatase found in the chromosome arms that removes phosphate groups from cohesin 
E) a phosphatase found in the chromosome arms that adds phosphate groups to cohesin

Question 11

Mammalian cells pass through a point comparable to START during G1,at which time they become committed to DNA replication and,ultimately,the completion of mitosis.What is this point called?

Accepted Answer

A) START 
B) the restriction point 
C) the limitation point 
D) the commitment point 
E) BEGIN 
A) START 
B) the restriction point 
C) the limitation point 
D) the commitment point 
E) BEGIN

Question 12

As cells enter mitosis,their microtubules disassemble and then reassemble forming the mitotic spindle with a focus at the ________,a special animal cell microtubule-organizing structure.

Accepted Answer

A) kinetosome 
B) centrosome 
C) kinetochore 
D) centromere 
E) chromosome 
A) kinetosome 
B) centrosome 
C) kinetochore 
D) centromere 
E) chromosome

Question 13

What holds together the chromatid from one homologous chromosome to a non-sister chromatid of the other homologue at the site of a chiasma?

Accepted Answer

A) H bonds 
B) ionic bonds 
C) covalent bonds 
D) disulfide linkages 
E) van der Waals forces 
A) H bonds 
B) ionic bonds 
C) covalent bonds 
D) disulfide linkages 
E) van der Waals forces

Question 14

What apparently drives the separation of centrosomes?

Accepted Answer

A) motor proteins associated with microfilaments 
B) motor proteins associated with adjacent microtubules 
C) contraction of individual microfilaments 
D) sliding of adjacent microfilaments over one another 
E) contraction of adjacent microtubules 
A) motor proteins associated with microfilaments 
B) motor proteins associated with adjacent microtubules 
C) contraction of individual microfilaments 
D) sliding of adjacent microfilaments over one another 
E) contraction of adjacent microtubules

Question 15

At the outer surface of the centromere of each chromatid is a proteinaceous,buttonlike structure called the __________.

Accepted Answer

A) primary constriction 
B) residence 
C) kinetochore 
D) proteasome 
E) kinetosome 
A) primary constriction 
B) residence 
C) kinetochore 
D) proteasome 
E) kinetosome

Question 16

Which of the following is a multiprotein complex that acts primarily during interphase to ubiquitinate proteins and target them for destruction by a proteasome?

Accepted Answer

A) SCF 
B) APC 
C) anaphase promoting complex 
D) both SCF and APC 
E) proteasomal activating complex 
A) SCF 
B) APC 
C) anaphase promoting complex 
D) both SCF and APC 
E) proteasomal activating complex

Question 17

The period in the cell cycle between the end of cell 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 18

Which part of the cell cycle is the most variable?

Accepted Answer

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

Question 19

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 20

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

What usually happens to vertebrate eggs immediately after they have been fertilized?

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

What may be the purpose of the clustering of telomeres in a variety of eukaryotic cells that presumably causes chromosomes to look like a flower bouquet?

What triggers the entry of a cell into mitosis?

Organisms in which meiotic divisions are closely linked to gamete formation,as in the case where meiosis occurs just prior to the differentiation of the spermatozoa,exhibit ___________.

How would you describe the orientation of the two centrioles of the centrosome relative to each other?

What is the event that begins prometaphase?

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

What multiprotein complex has recently been shown to play a significant role in chromosome compaction?

What appears to be responsible for the tighter adhesion between chromosomes seen at centromeres rather than along the chromosome arms?

Mammalian cells pass through a point comparable to START during G₁,at which time they become committed to DNA replication and,ultimately,the completion of mitosis.What is this point called?

As cells enter mitosis,their microtubules disassemble and then reassemble forming the mitotic spindle with a focus at the ________,a special animal cell microtubule-organizing structure.

What holds together the chromatid from one homologous chromosome to a non-sister chromatid of the other homologue at the site of a chiasma?

What apparently drives the separation of centrosomes?

At the outer surface of the centromere of each chromatid is a proteinaceous,buttonlike structure called the __________.

Which of the following is a multiprotein complex that acts primarily during interphase to ubiquitinate proteins and target them for destruction by a proteasome?

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

Which part of the cell cycle is the most variable?

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

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.

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

What usually happens to vertebrate eggs immediately after they have been fertilized?

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

What may be the purpose of the clustering of telomeres in a variety of eukaryotic cells that presumably causes chromosomes to look like a flower bouquet?

What triggers the entry of a cell into mitosis?

Organisms in which meiotic divisions are closely linked to gamete formation,as in the case where meiosis occurs just prior to the differentiation of the spermatozoa,exhibit ___________.

How would you describe the orientation of the two centrioles of the centrosome relative to each other?

What is the event that begins prometaphase?

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

What multiprotein complex has recently been shown to play a significant role in chromosome compaction?

What appears to be responsible for the tighter adhesion between chromosomes seen at centromeres rather than along the chromosome arms?

Mammalian cells pass through a point comparable to START during G1,at which time they become committed to DNA replication and,ultimately,the completion of mitosis.What is this point called?

As cells enter mitosis,their microtubules disassemble and then reassemble forming the mitotic spindle with a focus at the ________,a special animal cell microtubule-organizing structure.

What holds together the chromatid from one homologous chromosome to a non-sister chromatid of the other homologue at the site of a chiasma?

What apparently drives the separation of centrosomes?

At the outer surface of the centromere of each chromatid is a proteinaceous,buttonlike structure called the __________.

Which of the following is a multiprotein complex that acts primarily during interphase to ubiquitinate proteins and target them for destruction by a proteasome?

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

Which part of the cell cycle is the most variable?

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

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.

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 __.

Mammalian cells pass through a point comparable to START during G₁,at which time they become committed to DNA replication and,ultimately,the completion of mitosis.What is this point called?