1 2 4 8 How many chromosomes are in the middle cell 1 2 4 8 At what part of the cell cycle would you see a chromosome that looks like this G 1 G 2 M S At what part of the cell cycle would you see a chromosome that looks like this ID: 659159
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Slide1
The Cell CycleSlide2
How many chromosomes are in the middle cell?
1
2 48 Slide3
How many chromosomes are in the middle cell?
1
2 48 Slide4
At what part of the cell cycle would you see a chromosome that looks like this
?
G1
G2 MS Slide5
At what part of the cell cycle would you see a chromosome that looks like this?
G
1G
2 MS Slide6
Although the chromosome begins M phase looking as shown below, when is it split?
prophase
prometaphasemetaphase
anaphasetelophaseSlide7
Although the chromosome begins M phase looking as shown below, when is it split?
prophase
prometaphase
metaphaseanaphasetelophaseSlide8
Which of the following best describes the kinetochore?
a structure composed of several proteins that
associate with the centromere region of a
chromosome and that can bind to spindle microtubulesthe centromere region of a metaphase chromosome at which the DNA can bind with spindle proteinsthe array of vesicles that will form between two dividing nuclei and give rise to the metaphase platethe ring of actin microfilaments that will cause the appearance of the cleavage furrowthe core of proteins that forms the cell plate in a dividing plant cellSlide9
Which of the following best describes the kinetochore?
a structure composed of several proteins that associate with the centromere region of a chromosome and that can bind to spindle microtubules
the centromere region of a metaphase chromosome
at which the DNA can bind with spindle proteinsthe array of vesicles that will form between two dividing nuclei and give rise to the metaphase platethe ring of actin microfilaments that will cause the appearance of the cleavage furrowthe core of proteins that forms the cell plate in a dividing plant cellSlide10
A new cell is found and separation of its chromosomes is examined. How would you interpret this result?
Chromosomes are
separated by microfilaments.
Chromosomes are not separated.Microtubules shorten at the centrosome end.Microtubules shorten at the chromosome end.Slide11
A new cell is found and separation of its chromosomes is examined. How would you interpret this result?
Chromosomes are
separated by microfilaments.
Chromosomes are not separated.Microtubules shorten at the centrosome end.Microtubules shorten at the chromosome end.Slide12
Which
of the following statements
about typical eukaryotic chromosomes just before and after M phase is INCORRECT?
These chromosomes are not in a fully condensed state.Both contain double-stranded DNA molecules.Both would have just one kinetochore structure associated with their centromere.Each has many proteins associated with the chromosomal DNA.Typically both are linear structures with distinct ends.Slide13
Which
of the following statements
about typical eukaryotic chromosomes just before and after M phase is INCORRECT?
These chromosomes are not in a fully condensed state.Both contain double-stranded DNA molecules.Both would have just one kinetochore structure associated with their centromere.Each has many proteins associated with the chromosomal DNA.Typically both are linear structures with distinct ends.Slide14
Which
of the following does
NOT need to happen during a successful mitotic cell division?Single-chromatid
chromosomes must be segregated in full sets of the genome.Exchange of DNA between homologous chromosomes must happen before metaphase.The chromatin must condense fully so that the chromosomes are compact.Microtubules must be assembled as part of the spindle apparatus.Each of the chromosomes must start mitosis containing two DNA molecules.Slide15
Which
of the followin
g does NOT need to happen during a successful mitotic cell division?
Single-chromatid chromosomes must be segregated in full sets of the genome.Exchange of DNA between homologous chromosomes must happen before metaphase.The chromatin must condense fully so that the chromosomes are compact.Microtubules must be assembled as part of the spindle apparatus.Each of the chromosomes must start mitosis containing two DNA molecules.Slide16
Which
of the following is
a INCORRECT description of how cytokinesis (see figures on next slide) in animals differs from that in most plants?
Animal cytokinesis separates the two new nuclei but not the cytoplasm, while plant cytokinesis separates both.Animal cytokinesis does not involve the fusion of Golgi-derived vesicles.Microfilaments play a role in animal cytokinesis but not in plant cytokinesis.The new separating plasma membrane is pulled inward in animals but grows outward in plants.Animal cytokinesis produces no new cell wall regions, while plant cytokinesis does.Slide17Slide18
Which
of the followin
g is a INCORRECT description of how cytokinesis in animals differs from that
in most plants?Animal cytokinesis separates the two new nuclei but not the cytoplasm, while plant cytokinesis separates both.Animal cytokinesis does not involve the fusion of Golgi-derived vesicles.Microfilaments play a role in animal cytokinesis but not in plant cytokinesis.The new separating plasma membrane is pulled inward in animals but grows outward in plants.Animal cytokinesis produces no new cell wall regions, while plant cytokinesis does.Slide19
From prophase
through metaphase of
mitosis, each chromosome has _____ DNA molecules, while from anaphase through telophase of mitosis, each chromosome has _____ DNA molecule(s
).two; one2n; 1nhomologous; nonhomologouscondensed; decondensednonsister chromatid; sister chromatidSlide20
From prophase
through metaphase of
mitosis, each chromosome has _____ DNA molecules, while from anaphase through telophase of mitosis, each chromosome has _____ DNA molecule(s
).two; one2n; 1nhomologous; nonhomologouscondensed; decondensednonsister chromatid; sister chromatidSlide21
Of the events of a typical cell division listed below, which is most likely to occur THIRD in an animal cell that is going through mitosis
?
Kinetochore proteins associated with the
centromeres bind with associated microtubules.Segregation of complete genomic sets of chromosomes occurs.The nuclear envelope membranes are converted from flat bilayers into many spherical vesicles.The number of chromosomes in the cell doubles as double-chromatid chromosomes are split into pairs of single-chromatid chromosomes.Vesicles fuse to one another to form new nuclear envelope membranes.Slide22
Of the events of a typical cell division listed below, which is most likely to occur THIRD in an animal cell that is going through mitosis
?
Kinetochore proteins associated with the
centromeres bind with associated microtubules.Segregation of complete genomic sets of chromosomes occurs.The nuclear envelope membranes are converted from flat bilayers into many spherical vesicles.The number of chromosomes in the cell doubles as double-chromatid chromosomes are split into pairs of single-chromatid chromosomes.Vesicles fuse to one another to form new nuclear envelope membranes.Slide23
Which event will likely occur next in a
eukaryotic cell that is ending prophase (see figure) and will next enter
prometaphase
?The chromosome material will condense.Chromosomes will be moved toward alignment at the metaphase plate.Kinetochores will link some microtubules to the centromeres.The nuclear membranes will fragment into vesicles.Microtubules will elongateinto the nuclear space.Slide24
Which event will likely occur next in a
eukaryotic cell that is ending prophase (see figure) and will next enter
prometaphase
?The chromosome material will condense.Chromosomes will be moved toward alignment at the metaphase plate.Kinetochores will link some microtubules to the centromeres.The nuclear membranes will fragment into vesicles.Microtubules will elongate into the nuclear space.Slide25
Which
of the following is
NOT a typical trait of cancerous cells that makes them different from normal somatic cells?
Cancer cells often deactivate their apoptosis systems.Cancerous cells are not as sensitive to contact inhibition.The cell cycle often proceeds faster in cancer cells.Cancer cells are more mobile and less dependent on anchorage.Cancer cells have more effective DNA repair activities.Slide26
Which of the following is
NOT a typical trait of cancerous cells that
makes them different from normal somatic cells?
Cancer cells often deactivate their apoptosis systems.Cancerous cells are not as sensitive to contact inhibition.The cell cycle often proceeds faster in cancer cells.Cancer cells are more mobile and less dependent on anchorage.Cancer cells have more effective DNA repair activities.Slide27
Which
of
the following statements INCORRECTLY describes an aspect of an indicated point in the cell cycle?
During S phase, the DNA of each chromosome is replicated.Each chromosome during telophase has a single double-stranded DNA molecule.At the beginning of anaphase, the kinetochore on the chromosome loses its attachment to microtubules of the spindle.During G1, the DNA in the nuclear chromosomes is not all highly condensed.During metaphase, each chromosome consists of two double-stranded DNA helices linked together at a centromere.Slide28
Which
of
the following statements INCORRECTLY describes an aspect of an indicated point in the cell cycle?
During S phase, the DNA of each chromosome is replicated.Each chromosome during telophase has a single double-stranded DNA molecule.At the beginning of anaphase, the kinetochore on the chromosome loses its attachment to microtubules of the spindle.During G1, the DNA in the nuclear chromosomes is not all highly condensed.During metaphase, each chromosome consists of two double-stranded DNA helices linked together at a centromere.Slide29
Which of the following statements best explains this observation? A
cell in prophase of mitosis is successfully fused to a cell in G
2 of interphase, and then after fusion both nuclei are seen to have fully condensed chromosomes and to proceed on through mitosis.
Fusion of these cells is stressful, and stress induces cells to enter mitosis.A cytosolic mitotic promoting factor from the cell in prophase induced the nucleus from the cell in interphase to enter M phase.The production of items by the cell in G2 helps to induce the next stage of the cell cycle in both nuclei.The swapping of genes between the nuclei causes the induction of mitosis.The condensation of the chromosomes occurs whenever cells are fused.Slide30
Fusion
of these cells is stressful, and stress induces cells
to enter mitosis.
A cytosolic mitotic promoting factor from the cell in prophase induced the nucleus from the cell in interphase to enter M phase.The production of items by the cell in G2 helps to induce the next stage of the cell cycle in both nuclei.The swapping of genes between the nuclei causes the induction of mitosis.The condensation of the chromosomes occurs whenever cells are fused.Which of the following statements best explains this observation? A cell in prophase of mitosis is successfully fused to a cell in G2 of interphase, and then after fusion both nuclei are seen to have fully condensed chromosomes and to proceed on through mitosis.