chpt 5 revew Flashcards
difference btwn chromosomes, chromatin, and chromatids
chromosomes - double helix of DNA
chromatin - loose DNA and protien
chromatids - half a chromosome
what is the purpose of supercoiling the DNA
it reduces space and lets more DNA to be packaged
what are 3 stages if interphase
whathappens in each and what do they stand for
g1 phase (cell growth)
s phase (DNA sythesis)
G2 (more cell growth)
what are histoes
what is the purpos of them?
a group of protien found in chromitin
provides structure
wwhat stage does the cell spend most its life?
interphase
what are the stages of mitosis
prophase
metephase
anaphase
telephase
cytoknises
what is cytokinses
how do plants and aimals differ
division of a cell at the end of mitosis
Animlas dovosion start from the center and work to the walls
plants start from the walls and work to the center
what is the purpose of checkpoint in the cell
how many are there
to make sure theirs no bad cells passing through
3
what happens in each stage of mitosis
prophase -
2 -
3 -
4 -
5 -
what gets checked in each of the checkpoints in the cell
In the G1 it makes sure th cell
g2 evaluates the DNA
mitosis makes sure the cells devids properly
why do organisms use mitosis
it makes new cells to grow to replace old cells
what is cancer
why dont your cells stop this
uncontrolled cell growth
what is the difference btwn an ocogene and a tumor supperessor gene
there both genes to tell a cell to divids
oncogene tell the cell to divid
tumor superessor tell the cell to stop dividing
what is apoptosis
programmed cell death
what are the two kinds of cancer
what is the differnce btwn them
Bengin - slow growing cancer
maligment - grows and spreads fast