Question 1

___________ in males and _______ in females undergo mitosis giving rise to the cells that will carry out meiosis and eventually produce mature gametes.

Accepted Answer

A) Oogonia,spermatogonia 
B) Spermatogonia,oocytes 
C) Spermatogonia,oogonia 
D) Oogonia,spermatocytes 
E) Spermatocytes,oocytes 
A) Oogonia,spermatogonia 
B) Spermatogonia,oocytes 
C) Spermatogonia,oogonia 
D) Oogonia,spermatocytes 
E) Spermatocytes,oocytes

Question 2

When is a kinetochore assembled on the centromere?

Accepted Answer

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

Question 3

Why do the centromeres of sister chromatids stay firmly connected during anaphase I?

Accepted Answer

A) They are fused together at the level of their double helices. 
B) The cohesin situated at the centromeres is protected from proteolytic attack. 
C) The cohesin situated at the centromeres is digested by nucleolytic enzymes. 
D) The DNA of the centromeres is hydrolyzed by proteolytic enzymes. 
E) The proteins of the centromere region are impervious to lipase digestion. 
A) They are fused together at the level of their double helices. 
B) The cohesin situated at the centromeres is protected from proteolytic attack. 
C) The cohesin situated at the centromeres is digested by nucleolytic enzymes. 
D) The DNA of the centromeres is hydrolyzed by proteolytic enzymes. 
E) The proteins of the centromere region are impervious to lipase digestion.

Question 4

During what stage do studies of mice and yeast cells suggest that DNA breaks leading to recombination begin?

Accepted Answer

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

Question 5

What controls the progression of a cell from G2 to M?

Accepted Answer

A) mitotic Cdk 
B) synthetic Cdk 
C) the spindle 
D) chromosome compaction 
E) mitotic Cpk 
A) mitotic Cdk 
B) synthetic Cdk 
C) the spindle 
D) chromosome compaction 
E) mitotic Cpk

Question 6

As they separate,homologous chromosomes are seen to remain attached to each other at specific points by X-shaped structures at the crossover sites called _________.

Accepted Answer

A) crossover sites 
B) chiasmata 
C) chiastrata 
D) diplonema 
E) crenata 
A) crossover sites 
B) chiasmata 
C) chiastrata 
D) diplonema 
E) crenata

Question 7

What occurs during pairing of chromosomes in prophase of meiosis I that increases genetic variability?

Accepted Answer

A) further condensation of chromosomes 
B) genetic recombination between homologous chromosomes 
C) lots of mutations 
D) chromosomes lose lots of fragments 
E) gene duplication 
A) further condensation of chromosomes 
B) genetic recombination between homologous chromosomes 
C) lots of mutations 
D) chromosomes lose lots of fragments 
E) gene duplication

Question 8

What must happen in order for a cell to move to S phase from G1?

Accepted Answer

A) It must divide. 
B) It must generate an external signal. 
C) It must receive a growth-promoting signal. 
D) It must divide and receive a growth-promoting signal. 
E) It must grow greatly. 
A) It must divide. 
B) It must generate an external signal. 
C) It must receive a growth-promoting signal. 
D) It must divide and receive a growth-promoting signal. 
E) It must grow greatly.

Question 9

What triggers the start of centrosome duplication?

Accepted Answer

A) phosphorylation of a centrosomal protein by ATPase 
B) phosphorylation of a centrosomal protein by Cdk2 
C) dephosphorylation of a centrosomal protein by Cdk2 
D) dephosphorylation of a centrosomal protein by ATPase 
E) phosphorylation of a centrosomal protein focal adhesion kinase 
A) phosphorylation of a centrosomal protein by ATPase 
B) phosphorylation of a centrosomal protein by Cdk2 
C) dephosphorylation of a centrosomal protein by Cdk2 
D) dephosphorylation of a centrosomal protein by ATPase 
E) phosphorylation of a centrosomal protein focal adhesion kinase

Question 10

The separation of the entire cell and its cytoplasm into two daughter cells is known as _______.

Accepted Answer

A) meiosis 
B) cytokinesis 
C) chromokinesis 
D) chromatosis 
E) mitosis 
A) meiosis 
B) cytokinesis 
C) chromokinesis 
D) chromatosis 
E) mitosis

Question 11

What are the three major components of the nuclear envelope?

Accepted Answer

A) nuclear pore complex,nuclear lemina,nuclear membranes 
B) RER,nuclear lamina,Na+-K+ pump 
C) nuclear pore complexes,nuclear lamina,nuclear membranes 
D) mitotic kinases,nuclear lemina,nuclear pore complexes 
E) phospholipids,nuclear pore complexes,nucleoplasm 
A) nuclear pore complex,nuclear lemina,nuclear membranes 
B) RER,nuclear lamina,Na+-K+ pump 
C) nuclear pore complexes,nuclear lamina,nuclear membranes 
D) mitotic kinases,nuclear lemina,nuclear pore complexes 
E) phospholipids,nuclear pore complexes,nucleoplasm

Question 12

Which cells typically have very short cell cycles on the order of less than 30 minutes?

Accepted Answer

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

Question 13

During which stage of meiosis is cohesion between chromosome arms lost? The homologous chromosomes of each bivalent separate during this stage as well,but the cohesion between the sister chromatids and their centromeres remains strong.

Accepted Answer

A) anaphase II of meiosis 
B) anaphase I of meiosis 
C) telophase I of meiosis 
D) metaphase I of meiosis 
E) telophase II of meiosis 
A) anaphase II of meiosis 
B) anaphase I of meiosis 
C) telophase I of meiosis 
D) metaphase I of meiosis 
E) telophase II of meiosis

Question 14

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

Question 15

The current view of the fate of the ER during mitosis is that ________.

Accepted Answer

A) the ER network remains relatively intact during mitosis 
B) the ER is broken into its component macromolecules during mitosis,but it is built up from scratch after mitosis 
C) the ER is broken up into small vesicles that reassemble later 
D) the ER becomes part of the Golgi complex during mitosis 
E) the ER joins with mitochondria at the beginning of mitosis 
A) the ER network remains relatively intact during mitosis 
B) the ER is broken into its component macromolecules during mitosis,but it is built up from scratch after mitosis 
C) the ER is broken up into small vesicles that reassemble later 
D) the ER becomes part of the Golgi complex during mitosis 
E) the ER joins with mitochondria at the beginning of mitosis

Question 16

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

Accepted Answer

A) formation of oocytes and polar bodies 
B) formation of spermatogonia 
C) division of red blood cells 
D) division of B cells 
E) division of liver cells 
A) formation of oocytes and polar bodies 
B) formation of spermatogonia 
C) division of red blood cells 
D) division of B cells 
E) division of liver cells

Question 17

What happens if any of the condensin proteins are removed from the frog egg extracts within which chromosome compaction can occur in vitro?

Accepted Answer

A) Compaction continues unabated. 
B) Compaction occurs more quickly than normal. 
C) Compaction is prevented. 
D) The DNA expands further and fills the entire cell. 
E) Compaction occurs but occurs more slowly. 
A) Compaction continues unabated. 
B) Compaction occurs more quickly than normal. 
C) Compaction is prevented. 
D) The DNA expands further and fills the entire cell. 
E) Compaction occurs but occurs more slowly.

Question 18

What is the name of the process during which chromosome number is reduced so that each cell has a haploid number of chromosomes?

Accepted Answer

A) mitosis 
B) meiosis 
C) cytokinesis 
D) sexual differentiation 
E) meitosis 
A) mitosis 
B) meiosis 
C) cytokinesis 
D) sexual differentiation 
E) meitosis

Question 19

What stage of prophase I of meiosis begins when synapsis ends?

Accepted Answer

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

Question 20

The random assortment of chromosomes at anaphase I accounts for a large amount of the _________ within a species.

Accepted Answer

A) stability 
B) genetic variability 
C) biochemical inhibition 
D) genetic uniformity 
E) genetic forbearance 
A) stability 
B) genetic variability 
C) biochemical inhibition 
D) genetic uniformity 
E) genetic forbearance

_____ in males and _ in females undergo mitosis giving rise to the cells that will carry out meiosis and eventually produce mature gametes.

When is a kinetochore assembled on the centromere?

Why do the centromeres of sister chromatids stay firmly connected during anaphase I?

During what stage do studies of mice and yeast cells suggest that DNA breaks leading to recombination begin?

What controls the progression of a cell from G₂ to M?

As they separate,homologous chromosomes are seen to remain attached to each other at specific points by X-shaped structures at the crossover sites called _________.

What occurs during pairing of chromosomes in prophase of meiosis I that increases genetic variability?

What must happen in order for a cell to move to S phase from G₁?

What triggers the start of centrosome duplication?

The separation of the entire cell and its cytoplasm into two daughter cells is known as _______.

What are the three major components of the nuclear envelope?

Which cells typically have very short cell cycles on the order of less than 30 minutes?

During which stage of meiosis is cohesion between chromosome arms lost? The homologous chromosomes of each bivalent separate during this stage as well,but the cohesion between the sister chromatids and their centromeres remains strong.

What activates condensin at the onset of mitosis?

The current view of the fate of the ER during mitosis is that ________.

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

What happens if any of the condensin proteins are removed from the frog egg extracts within which chromosome compaction can occur in vitro?

What is the name of the process during which chromosome number is reduced so that each cell has a haploid number of chromosomes?

What stage of prophase I of meiosis begins when synapsis ends?

The random assortment of chromosomes at anaphase I accounts for a large amount of the _________ within a species.

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

___________ in males and _______ in females undergo mitosis giving rise to the cells that will carry out meiosis and eventually produce mature gametes.

When is a kinetochore assembled on the centromere?

Why do the centromeres of sister chromatids stay firmly connected during anaphase I?

During what stage do studies of mice and yeast cells suggest that DNA breaks leading to recombination begin?

What controls the progression of a cell from G2 to M?

As they separate,homologous chromosomes are seen to remain attached to each other at specific points by X-shaped structures at the crossover sites called _________.

What occurs during pairing of chromosomes in prophase of meiosis I that increases genetic variability?

What must happen in order for a cell to move to S phase from G1?

What triggers the start of centrosome duplication?

The separation of the entire cell and its cytoplasm into two daughter cells is known as _______.

What are the three major components of the nuclear envelope?

Which cells typically have very short cell cycles on the order of less than 30 minutes?

During which stage of meiosis is cohesion between chromosome arms lost? The homologous chromosomes of each bivalent separate during this stage as well,but the cohesion between the sister chromatids and their centromeres remains strong.

What activates condensin at the onset of mitosis?

The current view of the fate of the ER during mitosis is that ________.

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

What happens if any of the condensin proteins are removed from the frog egg extracts within which chromosome compaction can occur in vitro?

What is the name of the process during which chromosome number is reduced so that each cell has a haploid number of chromosomes?

What stage of prophase I of meiosis begins when synapsis ends?

The random assortment of chromosomes at anaphase I accounts for a large amount of the _________ within a species.

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

_____ in males and _ in females undergo mitosis giving rise to the cells that will carry out meiosis and eventually produce mature gametes.

What controls the progression of a cell from G₂ to M?

What must happen in order for a cell to move to S phase from G₁?