chapter 9 review! cellular reproduction. directions work in a group of 3-4 students we will go group...
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Directions
• Work in a group of 3-4 students • We will go group by group to answer a question.• If a group cannot answer a question correctly,
the first group to raise their hand and is called on may answer the question.
• There is no penalty for guessing. • Team with the most points at the end wins! • I may deduct points for disruptive behavior …
Which of the following explains why a cell's size is limited?
a. Volume increases faster than surface area.b. Surface area increases faster than volume.c. Homeostasis is disrupted by a cell that is too large.d. Both a and c
D
Which of the graphs in Figure 9-3 shows the correct changes in the amount of DNA in a cell as
it moves through one cell cycle?
• C
AA B C D
growth : G1 ::
a. mitosis : meiosisb. cytokinesis : Mc. mitochondria replication : Sd. DNA copying : S
A typical human cell contains 46 chromosomes. After mitosis and cell division, each of the two new cells formed from the original cell
a. gets 23 chromosomes.b. grows new chromosomes from existing DNA.c. gets a complete set of 46 chromosomes.d. None of the above
Which of the following shows the correct sequence of the cell
cycle?
a. C M G1 S G2c. G1 S G2 M Cb. S G1 G2 M Cd. None of the above
By the end of prophase, each of the following has occurred except
a. tighter coiling of the chromosomesb. breaking down of the nuclear envelopec. disappearing of the nucleolusd. lining up of chromosomes in the cell
How is the alignment of chromosomes, shown in Figure
9-4, on the equatorial plate of the cell maintained?
a. They are always located there, since that is where the nucleus was.
b. Tension between opposite spindle fibers pulls them there.
c. The pressure of the cytoplasm moves them there.
d. The chromosomes are attracted to each other and meet there.
If cancer is present, what is the likely explanation for what happened to the cells depicted in the curves labeled B and D in
Figure 9-2? • a. They thrived with the
cancerous cells.• b. They were harmed by
radiation therapy.• c. They died off due to
natural causes.• d. They died off because
the cancerous cells deprived them of nutrients.
Cancer is caused by…
a. Cell-membrane damagec. Mutationb. Metabolic poisoningd. Immune-system damage
Which of the following is a factor that can stop normal cells from
growing?
a. contact with other cellsb. growth factorsc. a cut in the skind. cyclin that has been taken from a
cell in mitosis
Explain how cancer cells are different from normal cells. Then, relate these
characteristics to the diagrams in Figure 10-
1.
Explain the role that p53, a gene that regulates DNA synthesis, might have had in the growth and
division of the cells shown in each diagram in
Figure 10-1.
How might the cancer cells shown in Figure 10-1 be prevented from doing more harm to
the organism of which they are a part?