Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, its effectiveness must be related to
a. Disruption of mitotic spindle formation
b. Suppression of cyclin production
c. Myosin denaturation and inhibition of cleavage furrow formation
d. Inhibition of DNA synthesis

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

a. An animal cell in the process of cytokinesis

b. A plant cell in the process of cytokinesis

c. A bacterial cell dividing

d. A plant cell in metaphase

One difference between cancer cells and normal cells is that cancer cells

a. Are unable to synthesize DNA

b. Are arrested at the S phase of the cell cycle

c. Continue to divide even when they are tightly packed together

d. Cannot function properly because they are affected by density-dependent inhibition

The decline of MPF activity at the end of mitosis is due to

a. The destruction of the protein kinase Cdk

b. Decreased synthesis of Cdk

c. The degradation of cyclin

d. The accumulation of cyclin

Which of the following occurs during apoptosis?

a. Lysis of the cell

b. Direct contact between signaling cells

c. Fragmentation of the DNA

d. Release of proteases outside the cell