Chapter 4 Flashcards
1
Q
Who discovered Cells?
A
Robert Hooke
2
Q
Who made cell theory?
A
Schleiden and Schwann
3
Q
3 tenets of cell theory?
A
o All organisms are composed of cells
o Cells are the smallest living things
o Cells arise only from pre-existing cells
4
Q
Due to reliance on diffusion of substances in and out….
A
- Cell size is limited
5
Q
Prokaryotic Cells (4)
A
- Simplest organisms
- lack membrane-bound nucleus
- cell wall outside of plasma membrane
- Contain 70s ribosome
6
Q
Two domains of Prokaryotes
A
- Archaea
- Bacteria
7
Q
Cytoplasm (bacteria)
A
- Gelationous solution
- 70 to 80% water
- Mix of sugars, amino acids, salts
8
Q
Bacterial chromosome
A
- Single DNA strand
- DNA tightly coiled around protein molecules
9
Q
Ribosomes (Bacteria)
A
- RNA
- Protein
- Disperesed through cytoplasm
- 70s
10
Q
Bacterial cells are encased by….
A
Strong cell wall composed of petidogluycan
11
Q
Achaea lack
A
Peptidoglycan
12
Q
Flagella
A
- 1 or more
- rotary motion
- polar
13
Q
Monotrichous
A
single flagellum
14
Q
Lophotrichous
A
Small bunches of tufts
15
Q
Amphitrichous
A
On both poles of the cell
