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Practice Quiz 8: Cell Reproduction

front 1

In a diploid cell with 5 chromosome pairs (2n = 10), how many sister chromatids will be found in a nucleus at prophase of mitosis?

back 1

20

front 2

Movement of the chromosomes during anaphase would be most affected by a drug that prevents which of the following events in mitosis and cell division?

back 2

shortening of microtubules

front 3

Starting with a fertilized egg (zygote), a series of six cell divisions would produce an early embryo with how many cells?

back 3

64

front 4

In the figure, G1 is represented by which numbered part(s) of the cycle?

back 4

I and V

front 5

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely ________.
Group of answer choices

back 5

a plant cell in the process of cytokinesis

front 6

The unlettered circle at the top of the figure shows a diploid nucleus with four chromosomes that have not yet replicated. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is black, and the other is gray. The circles labeled A to E show various combinations of these chromosomes. What is the correct chromosomal condition at prometaphase of mitosis?

back 6

B

front 7

Which of the following events occurs during interphase of the cell cycle?
Group of answer choices

back 7

replication of the DNA

front 8

The data in the table were obtained from a study of the length of time spent in each phase of the cell cycle by cells of three eukaryotic organisms designated beta, delta, and gamma. What is the best explanation for the data associated with delta cells?

back 8

Delta cells are in the G0 phase.

front 9

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

back 9

centrosome

front 10

Besides the ability of some cancer cells to over proliferate, which of the following situations might logically result in a tumor?

back 10

lack of appropriate cell death

front 11

For a chemotherapeutic drug to be useful for treating cancer cells, which of the following characteristics is most desirable?
Group of answer choices

back 11

It specifically inhibits rapidly dividing cells.

front 12

At which phase of the cell cycle do centrioles begin to move apart in animal cells?

back 12

prophase

front 13

The beginning of anaphase is indicated by which of the following processes?

back 13

Enzymatic cleavage of cohesin.

front 14

During which phase of mitosis do the chromatids become chromosomes?

back 14

anaphase

front 15

In the cells of many eukaryotic species, the nuclear envelope has to disappear to permit which of the following events in the cell cycle?

back 15

attachment of microtubules to kinetochores

front 16

Metaphase is characterized by ________.

back 16

alignment of chromosomes on the equator of the cell

front 17

How is plant cell cytokinesis different from animal cell cytokinesis?

back 17

Plant cells deposit vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow.

front 18

G1 is associated with which of the following cellular events?

back 18

normal growth and cell function

front 19

If there are 40 centromeres in a cell at anaphase of mitosis, how many chromosomes will be found in each daughter cell following cytokinesis?

back 19

20

front 20

Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle did the nucleus contain 6 picograms of DNA?

back 20

G2

front 21

If a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in a G1 cell?

back 21

10

front 22

Eukaryotic chromosomes are composed of which of the following macromolecules?

back 22

DNA and proteins

front 23

If the cell whose nuclear material is shown in the figure continues toward completion of mitosis, which of the following events would occur next?

back 23

formation of telophase nuclei

front 24

The M phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, cells would most likely be arrested in ________.

back 24

metaphase

front 25

The mitotic spindle plays a critical role in which of the following processes?

back 25

separation of sister chromatids

front 26

Cells from advanced malignant tumors often have very abnormal chromosomes and an abnormal number of chromosomes. What might explain the association between malignant tumors and chromosomal abnormalities?

back 26

Cell cycle checkpoints are not in place to stop cells with chromosome abnormalities.