Cell Cycle and Mitosis

What is the purpose of mitosis?

• To increase the surface area of a cell
• To allow cells to divide for growth, repair, and renewal
• For increasing genetic variation within a species
• To allow for DNA replication and protein synthesis

What causes cancer?

• Errors in the regulatory process of the cell cycle that results in uncontrolled cell growth

• There is no known cause for cancer

• Viruses and other pathogens

• Catching it from someone you know that has cancer

During telophase

• DNA lines up in the middle of the cell and DNA attaches to spindle fibers

• centrioles and spindle fibers appear

• Each DNA gets pull to the opposite sides of the cell

• 2 new nuclei form

What is a gene?

• A complex molecule containing genetic information

• A change in a gene or chromosome

• A part of the cell containing DNA and RNA

• A sequence of DNA that codes for a protein

What process best explains how muscle cells and nerve cells can develop from the same fertilized egg?

• genetic engineering
• survival of the fittest
• differentiation
• selective breeding

Which checkpoint involves ensuring all DNA has been replicated and "no" errors exist?

• G1

• G2

• M

• S

During the "s" phase of the cell cycle, DNA is duplicated. Why is this important?

• Allows for each daughter cell to be genetically DIFFERENT.

• Allows for each daughter cell to be genetically IDENTICAL

• Allows for each daughter cell to have 2X the amount of DNA as the parent cell.

• Allows for each daughter cell to have half the amount of DNA as the parent cell

During anaphase

• DNA lines up in the middle of the cell and DNA attaches to spindle fibers

• centrioles and spindle fibers appear

• Each DNA gets pull to the opposite sides of the cell

• DNA gets copied

Fruit fly body cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have -

• 16 chromosomes.
• 46 chromosomes.
• 8 chromosomes.
• 4 chromosomes.

The structures labeled B are_________, held together by a centromere.

• sister chromatid

• centriole

• centromere

• chromophere