CHAPTER 4: CELLS Flashcards
1
Q
What are the three fibers of the Cytoskeleton?
A
- Microfilaments
- microtubules
-intermediate filaments
2
Q
What are the tenets of Cell Theory?
A
- all organisms are composed of cells
- cells are the smallest living things
- cells arise from preexisting cells
3
Q
why are cells small?
A
to help facilitate diffusion. As the cell gets larger, the surface area to volume ratio decreases
4
Q
Prokaryotic Cell
A
- no nucleus
- no membrane or cell wall
two domains are Archea and bacteria
5
Q
Eukaryotic Cell
A
- membrane-based nucleus
- more complex
- compartmentalization aspect
6
Q
Endomembrane System Steps
A
rough er > smooth er > vesicles > Golgi
7
Q
What is Endosymbiosis?
A
- eukaryotic cells were once free living things
- have own DNA
- have two membranes
