Exam 12: The Cell Cycle

The following information applies to the questions below. Several organisms,primarily protists,have what are called intermediate mitotic organization. -These protists are intermediate in what sense?

How do kinetochore microtubules assist in the process of splitting centromeres?

The following questions are based on the following figure. -At which of the numbered regions would you expect to find cells at metaphase?

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

At which phase are centrioles beginning to move apart in animal cells?

Cells from an advanced malignant tumour most often have very abnormal chromosomes,and often an abnormal total number of chromosomes.Why might this occur?

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

Which of the following is a protein maintained at constant levels throughout the cell cycle that requires cyclin to become catalytically active?

For a newly evolving protist,what would be the advantage of using eukaryote-like cell division rather than prokaryotic binary fission?

Why do neurons and some other specialized cells divide infrequently?

A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus.How many picograms would be found at the end of S and the end of G₂?

What happens in G₁?

Suppose a biologist can separate one of a dozen pieces of chromatin from a eukaryotic (animal)nucleus.It might consist of which of the following?

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

Besides the ability of some cancer cells to overproliferate,what else could logically result in a tumour?

Use the following information to answer the questions below. You observe cells under the microscope and notice that,while in telophase,small vesicles line up along the middle of the cell. -The event that you are witnessing is

What does disappearance of the nuclear envelope permit in human and many other eukaryotic cells?

Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?