inter-phase
true
How many phases are in mitosis
4
two types of tumors are
benign and malignant
stem cells are
undifferentiated cells
true or false both plants and animals have stem
true
name the 3 phases of inter-phase
G1,S,G2
Describe prophase.
Chromosomes condense and become more visible. The nuclear membrane disappears.The centrioles separate and move to opposite poles of the cell.
Checkpoints in the cell cycle are designed to help prevent what?
mutations of the cells DNA from passing on (G1, G2) potentially causing cancer.
what are stem cells currently used for
to screen new medicine for safety in humans
plant stem cells have the capacity for what
nearly unlimited self renewal
Describe what happens during G1
During G1 the cell grows and synthesizes proteins, check point.
Describe what happens during metaphase.
Chromosomes line up across the middle of the cell. spindle fibers connect to each centromere of the cell.
cancer begins when..
a single cell is transformed into a cancer cell, one that does not heed the regulation mechanism
what are the two important characteristics of stem cells
They are unspecialized cells that are capable of renewing themselves by cell division. Under certain natural or experimental conditions they have the ability to differentiate into one or more types of specialized cells
many important compounds are derived from plants cells such as
medicines, pigments, perfumes, and insecticides
Describe what happens during S phase.
During S phase , chromosomes replicate and divide t form identical sister chromatids.
describe anaphase.
If control of the cell cycle is lost, the result may be uncontrolled cell division. What could this cause?
cancer
human embryonic stem cells are derived from what
a 5 day old embryo
what kind of cells can animal stem cells become
heart, lungs, skin, sperm, eggs, and all other tissues.
Describe what happens during G2.
Cells continue to grow and produce proteins necessary for cell division, checkpoint
describe telephase
Chromosomes uncoil.a nuclear envelope forms around the chromosomes at each "telephone" pole of the cell. spindle fibers break down. cytokenisis begins
cancer cells are destroyed by
checkpoints and G1 and G2
human embryonic stem cells have the capacity for
long term self renewal in a laboratory culture
adult stem cells are what
undifferentiated cells found in certain organs and differentiated tissues with a capacity for both self-renewal and differentiation.