Cell Cycle and Mitosis 18-19

During mitosis, what process decreases the possibility that chromsomal mutations might occur due to tangling and breakage of DNA?

• aligning on the equator/middle

• appearance of a spindle

• dense coiling of DNA into chromosomes

• break down of nuclear membrane

During mitosis, what occurs just prior to (before) chromosomes separating and moving to opposite sides of the cell?

• replication of DNA

• aligning of chromosomes on the equator

• cytokinesis

• growth of the cell

What is the time between cell divisions in the life cycle of the cell called?

• anaphase
• interphase
• prophase
• metaphase

At the end of mitosis, the cell membrane pinches in, dividing the cytoplasm into 2 cells. This is known as

• synthesis

• cytokinesis

• anaphase

• replication

Which of the following correctly describes the end result of mitosis and cytokinesis?

• Three identical cells are formed

• One cell contains enough DNA for two cells

• Two daughter cells are produced that are genetically identical to the parent cell

• Four identical daughter cells are produced from each parent cell.

Which statement is true about the structure labeled X, which is a centriole?

• In animal cells, spindle fibers originate from this organelle.

• This is the site of DNA replication.

• This organelle is not visible during the cell cycle.

• This organelle holds sister chromatids together.

Which of the following is the correct order of the events that occur during interphase?

• G1, G2, S

• S, G1, G2

• G1, S, G2

• G2, S, G1

What is one probable reason for the reappearance of the nuclear membrane at the end of mitosis?

• It is needed to pull apart sister chromatids.

• It must be present for a cell to enlarge.

• It acts as a protective barrier for the DNA.

• It produces the spindle during cell division.

The two structures that "a" is pointing to consist of.

• identical DNA

• genes from both the mother and father

• uncoiled DNA

• chromosomes that have already separated

It is important that the two new cells produced during mitosis receive an exact copy of the original cell's genetic code? Which answer below does NOT contribute to this outcome?

• alignment of chromosomes on the equator

• replication of the DNA in the original cell

• division of the cytoplasm at the end of mitosis

• attachment of spindle fibers to every centromere