Exam 9: The Cell Cycle

Please use the following information to answer the question(s) below. Nucleotides can be radiolabeled before they are incorporated into newly forming DNA and can therefore be assayed to track their incorporation. In a set of experiments, a student-faculty research team introduced labeled T nucleotides into the culture of dividing human cells at specific times. -Which of the following questions might be answered by such a method?

Figure 9.3 -In Figure 9.3, mitosis is represented by which numbered parts of the cycle?

The protein complex that activates progress through the M phase checkpoint will allow which of the following to occur?

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

Why do neurons and some other specialized cells divide infrequently?

Please use the following information to answer the question(s) 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 a nucleus in G1 of the cell division cycle?

Taxol is an anticancer drug extracted from the Pacific yew tree that binds to microtubules and prevents their depolymerization. Actively dividing cells treated with Taxol become blocked in which phase of mitosis?

At which phase of mitosis do the sister chromatids become daughter chromosomes?

Where do the microtubules of the spindle originate during mitosis in animal cells?

When a cell is in late anaphase of mitosis, which of the following may be seen?

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

Which of the following is released by platelets in the vicinity of an injury?

What is produced if a cell completes mitosis but does not undergo cytokinesis?

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

In the cells of some organisms, mitosis occurs without cytokinesis. This will result in

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