Question 1

The separation of duplicated chromosomes into two daughter nuclei 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 2

You are carrying out experiments in cell fusion by fusing together cells at different stages of the cell cycle.You then observe the behavior of each nucleus residing in the combined cytoplasm of the two cells.Which of the following responses would occur if you fused an S-phase cell to a cell in the M phase?

Accepted Answer

A) The nucleus from the M phase cell started to replicate its DNA. 
B) The S-phase nucleus undergoes premature chromosomal condensation to form a set of elongated compacted chromosomes. 
C) The M phase nucleus is affected in such a way that its compacted chromosomes decondense. 
D) The chromatin in the S-phase nuclei is compacted,but pulverized chromosomal fragments form. 
E) The S-phase nucleus undergoes premature chromosomal condensation; the compacted chromosomes are visibly doubled. 
A) The nucleus from the M phase cell started to replicate its DNA. 
B) The S-phase nucleus undergoes premature chromosomal condensation to form a set of elongated compacted chromosomes. 
C) The M phase nucleus is affected in such a way that its compacted chromosomes decondense. 
D) The chromatin in the S-phase nuclei is compacted,but pulverized chromosomal fragments form. 
E) The S-phase nucleus undergoes premature chromosomal condensation; the compacted chromosomes are visibly doubled.

Question 3

The nuclear lamina are disassembled _________.

Accepted Answer

A) as the interactions between nucleoporin complexes are disrupted and the proteins dissociate into the surrounding medium 
B) by depolymerization of the lamin filaments 
C) as their integrity is disrupted mechanically as holes are torn in the complexes by cytoplasmic dyneins associated with the outer nuclear membrane 
D) by cytoplasmic dyneins 
E) by cytoplasmic microtubules and microfilaments 
A) as the interactions between nucleoporin complexes are disrupted and the proteins dissociate into the surrounding medium 
B) by depolymerization of the lamin filaments 
C) as their integrity is disrupted mechanically as holes are torn in the complexes by cytoplasmic dyneins associated with the outer nuclear membrane 
D) by cytoplasmic dyneins 
E) by cytoplasmic microtubules and microfilaments

Question 4

The generally short-lived stage between the two meiotic divisions is called ________.

Accepted Answer

A) interphase 
B) intermediacy 
C) interkinesis 
D) middlephase 
E) zwitterphase 
A) interphase 
B) intermediacy 
C) interkinesis 
D) middlephase 
E) zwitterphase

Question 5

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

Question 6

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 7

What is an alternative to the classical view of the fate of the membranous portion of the nuclear envelope?

Accepted Answer

A) fragmentation into a population of small vesicles that disperse throughout the mitotic cell 
B) absorption of the membranes of the nuclear envelope into the membranes of the Golgi complex 
C) absorption of the membranes of the nuclear envelope into the membranes of the peroxisomes 
D) absorption of the membranes of the nuclear envelope into the membranes of the ER 
E) absorption of the membranes of the nuclear envelope into the membranes of the nucleoplasm 
A) fragmentation into a population of small vesicles that disperse throughout the mitotic cell 
B) absorption of the membranes of the nuclear envelope into the membranes of the Golgi complex 
C) absorption of the membranes of the nuclear envelope into the membranes of the peroxisomes 
D) absorption of the membranes of the nuclear envelope into the membranes of the ER 
E) absorption of the membranes of the nuclear envelope into the membranes of the nucleoplasm

Question 8

DNA replication and the production of additional histones occur during what part of the cell cycle?

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 9

How does securin get its name?

Accepted Answer

A) Securin secures chromosomes to the cell membrane. 
B) Securin secures the attachment between sister chromatids. 
C) Securin determines which substances can enter the nucleus and which cannot. 
D) Securin secures the binding of the kinetochore to the chromosome. 
E) Securin attaches kinetochores to the spindle. 
A) Securin secures chromosomes to the cell membrane. 
B) Securin secures the attachment between sister chromatids. 
C) Securin determines which substances can enter the nucleus and which cannot. 
D) Securin secures the binding of the kinetochore to the chromosome. 
E) Securin attaches kinetochores to the spindle.

Question 10

What is the function of the synaptonemal complex presently thought to be?

Accepted Answer

A) It serves to initiate genetic recombination. 
B) It maintains RNA in association with the chromosomes. 
C) It functions primarily as a scaffold to allow interacting chromatids to complete crossover activities. 
D) It prevents the breakage of the DNA double helix at the wrong place. 
E) It assures that the DNA double helix breaks at exactly the right place. 
A) It serves to initiate genetic recombination. 
B) It maintains RNA in association with the chromosomes. 
C) It functions primarily as a scaffold to allow interacting chromatids to complete crossover activities. 
D) It prevents the breakage of the DNA double helix at the wrong place. 
E) It assures that the DNA double helix breaks at exactly the right place.

Question 11

When do homologous regions of DNA in homologous chromosomes first make contact?

Accepted Answer

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

Question 12

When do most of the preparations for mitosis occur,including such activities as DNA replication?

Accepted Answer

A) cytokinesis 
B) M phase 
C) interphase 
D) telophase 
E) enterophase 
A) cytokinesis 
B) M phase 
C) interphase 
D) telophase 
E) enterophase

Question 13

What molecular motor has been implicated in the model of nuclear envelope dissolution that involves microtubules?

Accepted Answer

A) myosin 
B) kinesin 
C) dynein 
D) calpain 
E) calmodulin 
A) myosin 
B) kinesin 
C) dynein 
D) calpain 
E) calmodulin

Question 14

What is the average length of interphase?

Accepted Answer

A) It is exactly 10 hours in all cells. 
B) It is 12 hours long. 
C) There is not a good average since it depends on the cell type and conditions. 
D) It may last up to a day. 
E) On average,it lasts about 3 hours. 
A) It is exactly 10 hours in all cells. 
B) It is 12 hours long. 
C) There is not a good average since it depends on the cell type and conditions. 
D) It may last up to a day. 
E) On average,it lasts about 3 hours.

Question 15

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 16

In the human female,after their long arrest,when do oocytes resume meiosis?

Accepted Answer

A) just prior to their ovulation 
B) prior to birth 
C) between the ages of 4 and 6 
D) at the end of each menstrual cycle 
E) just after birth 
A) just prior to their ovulation 
B) prior to birth 
C) between the ages of 4 and 6 
D) at the end of each menstrual cycle 
E) just after birth

Question 17

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 18

During which stage of meiosis have the chromosomes become recompacted after interkinesis? They begin to line up at the metaphase plate and if the nuclear envelope had reformed earlier,it is once again broken down.

Accepted Answer

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

Question 19

Movement past the transition point near the end of G2 that moves cells on to mitosis requires cdc2 activation by _______.

Accepted Answer

A) Na+ ions 
B) mitotic cyclins 
C) ATP 
D) Na+-K+ ATPase 
E) mitotic chromatin 
A) Na+ ions 
B) mitotic cyclins 
C) ATP 
D) Na+-K+ ATPase 
E) mitotic chromatin

Question 20

At what stage of meiosis are vertebrate eggs usually fertilized?

Accepted Answer

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

The separation of duplicated chromosomes into two daughter nuclei is known as ________.

The nuclear lamina are disassembled _________.

The generally short-lived stage between the two meiotic divisions is called ________.

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

What event marks the end of zygotene?

What is an alternative to the classical view of the fate of the membranous portion of the nuclear envelope?

DNA replication and the production of additional histones occur during what part of the cell cycle?

How does securin get its name?

What is the function of the synaptonemal complex presently thought to be?

When do homologous regions of DNA in homologous chromosomes first make contact?

When do most of the preparations for mitosis occur,including such activities as DNA replication?

What molecular motor has been implicated in the model of nuclear envelope dissolution that involves microtubules?

What is the average length of interphase?

The start of centrosome duplication begins at the ______ transition.

In the human female,after their long arrest,when do oocytes resume meiosis?

Which cells typically have cell cycles lasting several months?

During which stage of meiosis have the chromosomes become recompacted after interkinesis? They begin to line up at the metaphase plate and if the nuclear envelope had reformed earlier,it is once again broken down.

Movement past the transition point near the end of G₂ that moves cells on to mitosis requires cdc2 activation by _______.

At what stage of meiosis are vertebrate eggs usually fertilized?

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 separation of duplicated chromosomes into two daughter nuclei is known as ________.

The nuclear lamina are disassembled _________.

The generally short-lived stage between the two meiotic divisions is called ________.

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

What event marks the end of zygotene?

What is an alternative to the classical view of the fate of the membranous portion of the nuclear envelope?

DNA replication and the production of additional histones occur during what part of the cell cycle?

How does securin get its name?

What is the function of the synaptonemal complex presently thought to be?

When do homologous regions of DNA in homologous chromosomes first make contact?

When do most of the preparations for mitosis occur,including such activities as DNA replication?

What molecular motor has been implicated in the model of nuclear envelope dissolution that involves microtubules?

What is the average length of interphase?

The start of centrosome duplication begins at the ______ transition.

In the human female,after their long arrest,when do oocytes resume meiosis?

Which cells typically have cell cycles lasting several months?

During which stage of meiosis have the chromosomes become recompacted after interkinesis? They begin to line up at the metaphase plate and if the nuclear envelope had reformed earlier,it is once again broken down.

Movement past the transition point near the end of G2 that moves cells on to mitosis requires cdc2 activation by _______.

At what stage of meiosis are vertebrate eggs usually fertilized?

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

Movement past the transition point near the end of G₂ that moves cells on to mitosis requires cdc2 activation by _______.