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Ap biology 9.1
questions about 9.1
28
Biology
11th Grade
09/25/2011

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Term
The cell cycle is an orderly set of stages that takes place between the time a ______ cell divides and he time the resulting_____cell also divide.
Definition
eukaryotic; daughter
Term
What three things happen when a cell is going to divide?
Definition
it grows larger, the number of organelles doubles, and the amount of DNA doubles
Term
What are the two portions of the cell cycle?
Definition
interphase; mitotic
Term
MOst of the cell cycle is spent in _____.
Definition
interphase
Term
What types of cells typically do not complete the cell cycle?
Definition
nerve and muscle cells
Term
When cells do not complete the cell cycle and are permanently arrested, they are said to have entered a ____ stage.
Definition
g zero
Term
90 % of the cell cycle would be what duration of time?
Definition
20 hours
Term
What are the three stages of interphase?
Definition
g one, s, and g two
Term
what does g stand for?
Definition
gap
Term
During g 1, the cell recovers from _____. Then the cell _____in size; doubles its _____, and accumulates materials that will be used for _____.
Definition
previous division, increases, organelles, dna synthesis
Term
During the S stage, _____or____occurs.
Definition
DNA synthesis or replication
Term
At the beginning of the S stage, each chromosome is composed of one ______.
Definition
dna double helix
Term
What is each double helix called?
Definition
chromatid
Term
During the g 2 stage, the cell synthesizes ______that will assist in cell division.
Definition
proteins
Term
What does the M in the m stage represent?
Definition
mitotic
Term
What is mitosis?
Definition
nuclear division
Term
What is cytokinesis?
Definition
division of the cytoplasm
Term
Following interphase, the cell enters the ____.
Definition
m stage
Term
During mitosis, what happens?
Definition
daughter chromosomes are distributed to two daughter nuclei
Term
When division of the cytoplasm is complete, _____are present.
Definition
two daughter cells
Term
Whe cell cycle is controlled by _____.
Definition
interal and external signals
Term
A_____is a molecule that stimulates or inhibits a metabolic event.
Definition
signal
Term
_____are external signals received at the plasma membrane.
Definition
grwoth factors
Term
Researchers have identified a family of internal signaling proteins called______that increase and decrease as teh cell cycle continues.
Definition
cyclins
Term
What has to be present in order for the cell to proceed from the g 2 stage to the m stage and for the cell to proceed from the g 1 stage to the s stage.
Definition
cyclin
Term
The cell cycle stops at the _____if dna has not finished replicating.
Definition
g 2 checkpoint
Term
_____is often defined as programmed cell death because the cell progresses through a usual series of events that bring about its destruction.
Definition
apoptosis
Term
Cell division increases and apoptosis decreases the number of ____.
Definition
somatic cells
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