Cell Division II: Mitosis

Mitosis occurs at the same rate in all cells.

• a.true
• b.false

Chromatin is ____

• a.another name for chromosomes.
• b.the name for the process of cell division.
• c.the name of the dye Fleming used on salamander embryo cells.
• d.the material of which chromosomes are made.

What did Flemming’s work with salamander embryos show?

• a.That salamander cells do not have visible chromosomes.
• b.That it was possible to create a dye that did not kill cells.
• c.That the structures inside of cells were part of the life process.
• d.That cells store artifacts from outside of the organism.

Which is a true statement about the phases of cell division that we call mitosis?

• a.The phases of cell division are the same in the cells of all living things.
• b.The phases of cell division occur in bacteria.
• c.The phases of cell division occur in a random order.
• d.The phases of cell division are cyclical.

The characteristics of an organism are determined by the organism’s ____.

• a.genome
• b.centromeres
• c.kinetochores
• d.histones

As mitosis begins, the nucleus contains ____

• a.one copy of the organism’s genome.
• b.two copies of genetic sequence of the organism.
• c.three copies of the genome of the organism.
• d.none of the genes of an organism.

Which was NOT one of Fleming’s original stages of cell division?

• a.prophase
• b.metaphase
• c.prometaphase
• d.telophase

What happens during prophase?

• a.The nucleolus disappears from the nucleus.
• b.The cell membrane around the nucleus breaks down.
• c.The two identical chromatids of each chromosome separate.
• d.A new nuclear membrane forms.

The larger the organism, the more chromosomes it has.

• a.true
• b.false

Which of the following is not one of the five phases of mitosis?

• a.prometaphase
• b.anaphase
• c.interphase
• d.telophase

Why are certain cancers are thought to result from cells missing the G2 phase of interphase?

• a.The G2 phase is a quality-control step before the cell undergoes mitosis.
• b.The G2 phase slows down cell division, keeping rapidly dividing cancer cells in check.
• c.Special cancer-fighting agents are manufactured during G2.
• d.When the G2 step is skipped, it means that other important steps are likely skipped as well, leading to cancer.

A cancer treatment drug is likely to be most effective if ____

• a.it doesn’t interfere with cell division.
• b.it forces cell division.
• c.it slows down mitosis.
• d.it speeds up mitosis.