Exam 11: The Cell Cycle

Myosin is a motor protein involved in animal cell cytokinesis.It binds to ATP or ADP,causing the myosin to move with respect to actin.What is the effect of the interaction between myosin and actin?

Which of the following statements is FALSE with respect to both bacterial binary fission and eukaryotic mitotic cell division?

Which of the following is NOT involved in the regulation of the eukaryotic cell cycle?

At the end of mitosis,each G₁ daughter cell has

FtsZ is a bacterial cytoskeletal protein.It forms a contractile ring involved in bacterial cytokinesis.Its function is analogous to

Some cells have several nuclei per cell.How might such multinucleated cells arise?

For cells to divide more rapidly,increased production would likely be required of each of the following proteins EXCEPT

If a cell has accumulated DNA damage,it is unlikely to

The first gap in the cell cycle (G₁)corresponds to

Scientists isolate cells in various phases of the cell cycle.They find a group of cells that have 1½ times more DNA than G₁ phase cells.The cells of this group are in

Mitosis is the process of chromosome separation.Cytoplasm is divided between the two daughter cells in a process known as

Exposure of zebrafish nuclei to meiotic cytosol resulted in phosphorylation of NEP55 and L68 proteins by cyclin-dependent kinase 2.NEP55 is a protein of the inner nuclear membrane,and L68 is a protein of the nuclear lamina.What is the most likely role of phosphorylation of these proteins in the process of mitosis?

The mitotic spindle is a microtubular structure that is involved in

Following the attachment of spindle microtubules to kinetochores,chromosomes are moved around by

How is plant cell cytokinesis different from animal cell cytokinesis?

One reason cancer cells are easier to culture than normal cells extracted from an organism is that

Once a cell completes mitosis,molecular division triggers must be turned off.What happens to MPF during mitosis?

Figure 11.1 -Based on structures present in the figure above,this cell is in which substage of interphase?

Nerve cells lose their ability to undergo mitosis.Instead,they are permanently stuck in

The microtubular organizing center found in animal cells is an identifiable structure present during all phases of the cell cycle.Specifically,it is known as which of the following?