8.1.4 Cytokinesis Flashcards
1
Q
mitosis
A
- the process of nuclear division that requires the doubling of a cell’s DNA so that each resulting cell
has one copy of the genetic information
2
Q
cytokinesis
A
- the division of the cell’s cytoplasm that results in two identical daughter cells.
- the division of the cytoplasm of the cell that results in two distinct cells. Cytokinesis takes place after
mitosis in M phase of the cell cycle.
3
Q
Actin microfilaments and myosin
A
- run across the length of the cell and slide against each other to contract. When an animal cell first begins to undergo cytokinesis, the cell elongates from the contraction of the microfilaments.
- As the microfilaments contract further, the cell membrane pinches inward forming the cleavage furrow. The two sides of the membrane will come together and eventually fuse to form two distinct cells.
4
Q
note
A
- Plant cells have a different mechanism for division since they have cell walls. The Golgi apparatus first makes vesicles that migrate to the equator of the cell via microtubules derived from the spindle. The vesicles will fuse to produce a new plasma membrane. Proteins within the vesicles will help to make a new cell wall.
5
Q
Which statement about cytokinesis is correct?
A
- Cytokinesis is a part of M phase
6
Q
A chemical called cytochalisin B is able to disrupt microfilament formation. If cytochalasin B is added to a culture of cells, what would it interfere with?
A
- Cleavage
7
Q
If mitosis were to occur without cytokinesis, what would be likely to happen?
A
- There would be cells with several nuclei
8
Q
Which of the following statements regarding cytokinesis is false?
A
- Cytokinesis occurs immediately following anaphase
9
Q
Mitosis is the process of cell division in plants and animals.
A
- False
10
Q
Vesicles derived from the __________ fuse together to form the cell membrane during cytokinesis in plants.
A
- Golgi apparatus
