Ch. 12 The Cell Cycle, Slides of Cell Biology

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Ch. 12 The Cell Cycle

1)How many chromosomes are in the middle cell?

2)At what part of the cell cycle would you see a

chromosome that looks like this?

a) G 1

b) G 2

c) M

d) S

2)At what part of the cell cycle would you see a

chromosome that looks like this?

a) G 1

b) G 2

c) M

d) S

3)The chromosome begins M phase looking as shown.

When does it split?

a) prophase

b) prometaphase

c) metaphase

d) anaphase

e) telophase

4)Which best describes the kinetochore?

a) a structure composed of several proteins that associate with the centromere region of a chromosome and that can bind to spindle microtubules

b) the centromere region of a metaphase chromosome where the DNA can bind with spindle proteins

c) the array of vesicles that will form between two dividing nuclei and give rise to the metaphase plate

d) the ring of actin microfilaments that will cause the appearance of the cleavage furrow

e) the core of proteins that forms the cell plate in a dividing plant cell

5)A new cell is found and separation of its chromosomes is

examined. If the darker patches in the yellow lines are

places where the spindle was bleached with a laser, what do

these images tell us?

a) Chromosomes are separated by microfilaments.

b) Chromosomes are not separated.

c) Microtubules shorten at the centrosome end.

d) Microtubules shorten at the chromosome end.

5)A new cell is found and separation of its chromosomes is

examined. If the darker patches in the yellow lines are

places where the spindle was bleached with a laser, what do

these images tell us?

a) Chromosomes are separated by microfilaments.

b) Chromosomes are not separated.

c) Microtubules shorten at the centrosome end.

d) Microtubules shorten at the chromosome end.

6)Which statement about typical eukaryotic chromosomes

just before and after M phase is incorrect?

a) These chromosomes are not in a fully condensed state.

b) Both contain double-stranded DNA molecules.

c) Both have just one kinetochore structure associated with their centromere.

d) Both have many proteins associated with the chromosomal DNA.

e) Typically, both are linear structures with distinct ends.

7)From prophase through metaphase of mitosis, each

chromosome has _____ DNA molecules, while from

anaphase through telophase of mitosis, each chromosome

has _____ DNA molecule(s).

a) two; one

b) 2 n ; 1 n

c) homologous; nonhomologous

d) condensed; decondensed

e) nonsister chromatid; sister chromatid

8)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?

a) Kinetochore proteins associated with the centromeres bind with associated microtubules.

b) Segregation of complete genomic sets of chromosomes occurs.

c) The nuclear envelope membranes are converted from flat bilayers into many spherical vesicles.

d) The number of chromosomes in the cell doubles as double-chromatid chromosomes are split into pairs of single-chromatid chromosomes.

e) Vesicles fuse to one another to form new nuclear envelope membranes.

8)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?

a) Kinetochore proteins associated with the centromeres bind with associated microtubules.

b) Segregation of complete genomic sets of chromosomes occurs.

c) The nuclear envelope membranes are converted from flat bilayers into many spherical vesicles.

d) The number of chromosomes in the cell doubles as double-chromatid chromosomes are split into pairs of single-chromatid chromosomes.

e) Vesicles fuse to one another to form new nuclear envelope membranes.

9)Which event will likely occur next in a eukaryotic cell

entering prometaphase?

a) The chromosome material will condense.

b) Chromosomes will be moved toward alignment at the metaphase plate.

c) Kinetochores will link some microtubules to the centromeres.

d) The nuclear membranes will fragment into vesicles.

e) Microtubules will elongate into the nuclear space.

10)Which statement comparing cancer cells and normal

somatic cells would lose points on a test?

a) Cancer cells often deactivate their apoptosis systems.

b) Cancer cells are not as sensitive to contact inhibition.

c) The cell cycle often proceeds faster in cancer cells.

d) Cancer cells are more mobile and less dependent on anchorage.

e) Cancer cells have more effective DNA repair activities.