Compared to small cells,
large cells have
more trouble
Moving need materials in and waste products out
100
__________ is the series of
events that cells go through
as they grow and divide.
Cell Cycle
100
Cyclins are a family of closely
related proteins that
Regulating the Cell Cycle
100
What is a tumor?
A mass of cells
200
The process by which
a cell divides into
two daughter cells
is called
cell division
200
The two main stages
of cell division
mitosis and cytokinesis
200
Cancer is a disorder in which
some cells have lost the
ability to control their
growth rate
200
Name the four phases of
mitosis in order.
Prophase, metaphase, anaphase, telophase
300
As a cell becomes larger, its
Volume increases faster than its surface area
300
What is the role of the
spindle during mitosis?
It helps separate the chromosomes
300
Explain why normal cells grown
in a petri dish tend to stop
growing once they have covered
the bottom of the dish.
Contact with other cells stops cell growth
300
During normal mitotic cell division,
a parent cell having four
chromosomes will produce
two daughter cells, each containing
four chromosomes
400
Identify a factor that can stop
cells from growing
Contact with other cells can stop cell growth
400
What event occurs
during interphase?
The cell grows
400
A scientist suspects that a given
cell is cancerous even though
it has not yet formed a tumor.
How might the scientist test
the cell to see if it is cancerous?
Culture the cell in a petri dish or test the cell's DNA to see if it has a normal copy of the p53 gene.
400
When during the cell cycle
are chromosomes visible?
Only during cell division
500
What kinds of problems
does growth cause for cells?
It functions less efficiently because it places more demands on its DNA and it is less able to move materials to their proper destinations quickly.
500
Name and describe the four
main phases of the cell cycle.
G1 phase-cell growth, S phase-DNA replication,
G2 phase-preparation for mitosis,
M phase-cell division (mitosis and cytokinesis)
500
How do cancer cells differ
from normal cells?
Cancer cells do not respond to the signals that control the growth of normal cells. As a result, cancer cells form tumors and can spread throughout the body.
500
Describe how a plant cell
produces a new cell wall
during cytokinesis.
A cell plate forms in the cytoplasm midway between each new nucleus. The cell plate gradually develops into a separating membrane, and a cell wall begins to appear in the cell plate.