5.1 Quiz Flashcards
What are the phases of inter phase?
G1: day to day function, grows in size
S: synthesize, copies DNA
G2: organelles are doubled
What are the phases of the cell cycle?
- Inter phase
- Mitosis
- Cytokinesis
What is G0?
Cells never divide. Ex: neurons and red blood cells
Mitosis
4 stages
nuclear division
Cytokinesis
final cell divides
Checkpoints
G1: size and health
G2: size and replication
Mitosis: spindle fibers and chromosones
Bigger cell=
smaller ratio
Surface Area=
cell membrane
Contact Inhibition
STOP: no more room
Growth Factors
GO: chemical signal, keep growing
Kinase
enzyme
Cyclin
protein
Cyclin-dependent Kinase (CDK)
Does the checkpoints during cell cycle
Apoptosis
pre programmed cell death
CDK is most active at
the check points
Benign
not life threatening
Malignant
cancerous; quickly growing
Metastasis
new tumors
Carcinogen
cancer causing substance
Janssen
invented compound microscope
Hooke
used a three lens microscope to examine cork
Leeuwenhoek
found animalcules; developed a better microscope
Schlieden
proposed that plants are made of cells
Schwann
all living things are made of cells
