Exam 9: The Cell Cycle

Use the data in Table 9.1 to answer the following questions. The data 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. Table 9.1 Minutes Spent in Cell Cycle Phases -The best conclusion concerning delta is that the cells

In eukaryotic cells, chromosomes are composed of DNA

Density-dependent inhibition is explained by which of the following?

Use the following information to answer the questions below. The unlettered circle at the top of Figure 9.1 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-E show various combinations of these chromosomes. Figure 9.1 -What is the correct chromosomal condition for one daughter nucleus at telophase of mitosis?

Which of the following is a protein synthesized at specific times during the cell cycle that associates with a kinase to form a catalytically active complex?

Which of the following triggers the cell's passage past the G2 checkpoint into mitosis?

Why do neurons and some other specialized cells divide infrequently?

Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in concentration during the cell cycle, are called

What is a cleavage furrow?

Which of the following most accurately describes a cyclin?

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

Humans produce skin cells by mitosis and gametes by meiosis. The nuclei of skin cells produced by mitosis will have

When a cell is in late anaphase of mitosis, which of the following will we see?

Use the data in Table 9.1 to answer the following questions. The data 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. Table 9.1 Minutes Spent in Cell Cycle Phases -Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is that

A plant-derived protein known as colchicine can be used to poison cells by blocking the formation of the spindle. Which of the following would result if colchicine is added to a sample of cells in G2?

Figure 9.2 -If the cell whose nuclear material is shown in Figure 9.2 continues toward completion of mitosis, which of the following events would occur next?

During which phase of mitosis do the chromatids become chromosomes?

The following questions are based on Figure 9.3. Figure 9.3 -Which number represents DNA synthesis?

You have a series of cells, all of which were derived from tumors, and you first need to find out which ones are malignant. What could you do?

Movement of the chromosomes during anaphase would be most affected by a drug that prevents