Mitosis assignment and quiz

Which statement accurately describes the relationship between cytokinesis and mitosis? Mitosis includes interphase and cytokinesis. Cytokinesis occurs before mitosis. Cytokinesis occurs during mitosis. Interphase includes cytokinesis and mitosis.

Cytokinesis occurs during mitosis.

Mitosis occurs in ? cells. What is the end result of mitosis? one cell with two identical copies of DNA two cells with different copies of DNA one cell with two different copies of DNA During the final stage of the cell cycle, cytokinesis allows the cell to finish dividing, creating... with.... copies of DNA.

eukaryotic one cell with two identical copies of DNA two cells identical

An example of mitosis at work is a leaf turning yellow. growing. taking in carbon dioxide. hosting a caterpillar.

growing

Why is mitosis important to organisms? Check all that apply. reproduction of the organism growth of the organism repair of damaged or dead cells reproduction of new cells What would happen to an organism if mitosis did not occur? Check all that apply. The organism would not be affected. The organism would not grow. If an organism were cut or burned, the damaged area would not heal. The organism would not produce new cells.

growth of the organism repair of damaged or dead cells reproduction of new cells The organism would not grow. If an organism were cut or burned, the damaged area would not heal. The organism would not produce new cells.

Mitosis is divided into phases. mc007-1.jpg Which phase of mitosis is shown in the diagram? prophase metaphase anaphase telophase

metaphase

Read the article and review the phases of mitosis. Mitosis Use the information to identify the phases described below. Sister chromatids line up along the middle of the cell. Chromosomes disperse and are no longer visible. Chromatin condenses into chromosomes, and spindles begin to form. Sister chromatids separate and move to opposite sides of the cell.

metaphase telophase prophase anaphase

During which phase of mitosis do the nuclear membrane, nucleolus, and nucleus dissolve? metaphase prophase anaphase telophase

prophase

In which phase of mitosis are chromosomes first seen as a result of chromatin coiling? prophase anaphase metaphase telophase

prophase

Read the article and review the phases of mitosis. Mitosis What are the four phases of mitosis? prophase metaphase anaphase telophase cytokinesis

prophase metaphase anaphase telophase

Early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. In which stage of the cell cycle is this process reversed? cytokinesis interphase anaphase telophase

telophase

Which is the end result of cytokinesis? one cell that has two identical copies of DNA one cell that has two different copies of DNA two cells that have two identical copies of DNA two cells that have two different copies of DNA

two cells that have two identical copies of DNA

Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure? Patients do not receive harmful or ineffective medication. The cultured cells are not in their normal environment. Doctors know how to treat all types of cancer. One tissue culture can be used for all cancer patients.

Patients do not receive harmful or ineffective medication.

Which statement best describes cancer cells? They grow as a single layer of cells. They cease to reproduce after 20-50 mitotic divisions. They reproduce only when needed to replace missing cells. They are not regulated by contact inhibition.

They are not regulated by contact inhibition.

Explain the process of mitosis in a tissue culture for normal cells.

What did you include in your answer? Cell tissue is taken from a living organism. Cells divide and reproduce in the culture. Cells continue mitosis until they are touching, then they stop reproducing until a cell dies. Cells reproduce one layer thick and then stop reproducing. Cells undergo 20 to 50 mitotic divisions in a tissue culture.

Explain the process of mitosis in a tissue culture for cancer cells.

What did you include in your response? Cancer cells are taken from a living organism and grown in a culture. Cancer cells grow at an uncontrolled rate. Cancer cells do not stop growing when they are touching; they continue growing. Cancer cells grow multiple layers thick. Cancer cell growth differs from normal cell growth and the number of mitotic divisions are unlimited.

Describe the benefits to using tissue cultures to study medications used for treating cancer cells.

What did you include in your response? Medications can be tested on cell cultures instead of being injected into patients unnecessarily. Cancer cells continue to grow in the cultures uncontrollably allowing scientists to test multiple medications on the cancer cells. Specific treatments that are shown to fight the growth of cancer cells in the culture can be used on patients. Cultures are safer to use than injections of unneeded medications into patients.

Which are replicated during interphase? sister chromatids chromosomes centromeres nuclei

chromosomes