1.5- PLANT CELL CYCLE: Interphase & Cell Division Flashcards
Interphase and Cell Division
2 meristems- has undifferentiated and dividing cells
delivers new cells to growing structures
SAM and RAM
cell recovers from division
conducts normal metabolism
G1
gap 1
cell’s DNA is replicated
S phase
synthesis phase
cell prepares for division
tubulin dimers synthesized to form spindle microtubules
G2
gap 2
formed by G2 microtubules
site of future cell plate that determines the division plane of the cell and daughter cells’ size
preprophase band
condensation of chromosomes
nucleolus fragmentation
nuclear envelope disintegrates
form: spindle apparatus at opposite ends
prophase
alignment of chromosomes at metaphase plate
metaphase
microtubule that helps with the movement of chromosomes
spindle microtubules
microtubule that aids in formation of new wall plasmodesmata
unattached microtubules
chromosome segragation, spindle elongation
anaphase
phragmoplast formation
nuclear envelope reform
nucleoli restored
small vesicles accumulate (for cytokinesis)
telophase
-preprophase band gone
-microtubules polymerize to complete mitotic spindle
-multiple foci at opposite ends
prometaphase
checkpoint- stop cells from proceeding if spindle microtubules have incorrectly interacted w/ the kinetochores
Cyclin B- CDK B complex
metaphase checkpoint
cell plate formation
separates two daughter cells
chromosomes completely decondensed
cytokinesis
where island in center of cell grows outward
vesicle fusion