As a cell becomes larger, itsa. volume increases faster than its surface area.b. surface area increases faster than its volume.c. volume increases, but its surface area stays the same.d.surface area stays the same, but its volume increasesa.

Which of the following happens when a cell divides?a. The cell’s volume increases.b. It becomes more difficult for the cell to get rid of wastes.c. Each daughter cell receives its own copy of the parent cell’s DNA.d.It becomes more difficult for the cell to get enough oxygen and nutrients.c

After cell division, each daughter cell hasa. a lower surface area/volume ratio than the parent cell.b. a higher surface area/volume ratio than the parent cell.c.more DNA in its nucleus than the parent cell.d.less DNA in its nucleus than the parent cell.b

10. The structure labeled A in Figure 10–5 is called thea. centromere.b. centriole.c. sister chromatid.d.spindle.a

When during the cell cycle are chromosomes visible?a. only during interphaseb. only when they are being replicatedc. only during cell divisiond.only during the G1 phasec

Which of the following is a correct statement about the events of the cell cycle?a. Little happens during the G1 and G2 phases.b. DNA replicates during cytokinesis.c. The M phase is usually the longest phase.d.Interphase consists of the G1, S, and G2 phases.d

When during the cell cycle is a cell’s DNA replicated?a. G1 phaseb. G2 phasec. S phased.M phasec

The process by which a cell divides into two daughter cells is calleda. cell division.b. metaphase.c. interphase.d.mitosis.d

Compared to small cells, large cells have more troublea. dividing.b. producing daughter cells.c. storing needed materials and waste products.d.moving needed materials in and waste products out.d

The structures labeled B in Figure 10–5 are calleda. centromeres.b. centrioles.c. sister chromatids.d. spindles.

The first phase of mitosis is calleda. prophase.b. anaphase.c. metaphase.d.interphase.a

During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?a. prophaseb. telophasec. metaphased.Anaphasec

Cell division is represented in Figure 10–3 by the lettera. A.b. B.c. C.d.D.d

Which of the following represents the phases of mitosis in their proper sequence?a. prophase, metaphase, anaphase, telophaseb. interphase, prophase, metaphase, anaphase, telophasec. interphase, prophase, metaphase, telophased.prophase, anaphase, metaphase, telophase

a

Which of the following is a phase of mitosis?a. cytokinesisb. interphasec. prophased.S phasec

The two main stages of cell division are calleda. mitosis and interphase.b. synthesis and cytokinesis.c. the M phase and the S phase.d.mitosis and cytokinesis.d

Which of the following explains why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish?a. The cells lack cyclin.b. The petri dish inhibits cell growth.c. Contact with other cells stops cell growth.d.Most cells grown in petri dishes have a defective p53.c

Which of the following are external regulators of the cell cycle?a. cyclinsb. growth factorsc. mitotic spindlesd.cancer cellsb

What is the role of the spindle fibers during mitosis?a. They help separate the chromosomes.b. They break down the nuclear membrane.c. They duplicate the DNA.d.They make the chromosomes visible. a

Cyclins are a family of closely related proteins thata. regulate the cell cycle.b. produce p53.c. cause cancer.d.work to heal wounds.a

A cell with a defective p53 gene is likely toa. stop responding to growth regulators.b. stop dividing to produce daughter cells.c. generate hormones that combat tumors.d.produce cells without a defective p53 gene.a

Why are stem cells important?a. They have specialized DNA.b. They are incapable of becoming cancer cells.c. They have the potential to undergo cell division.d.They have the potential to develop into other cell types.d

Cancer is a disorder in which some cells have lost the ability to control theira. size.b. spindle fibers.c. growth rate.d. surface area.c

Cancer cells form masses of cells calleda. tumors.b. cyclins.c. growth factors.d.p53.a

When cells are grown in a laboratory, which of the following is a factor that can stop normal cells from dividing?a. contact with other cellsb. growth factorsc. a cut in the skind.injection of cyclina