ch 3 part I - cells and external structures

Question 1

what structures are common in both prokaryotes and eukaryotes?

Answer 1

cell membranes, cytoplasm, & ribosomes

Question 2

what are 6 basic differences b/t prokaryotes & eukaryotes?

Answer 2

size, DNA organization, chromosomes, cell wall, reproduction & composed of

Question 3

are prokaryotes or eukaryotes more “primitive”?

Answer 3

prokaryotes bc they lack membrane-bound cell orgnaelles

Question 4

what are the 4 structies of prokaryites?

Answer 4

1. glycocalyces
2. flagella
3. fimbrae
4. pili

Question 5

what is the structure & function of glycocalyces?

Answer 5

structure:
- sticky substance surround outside of cell
- made of polysaccharides

function:
- attach cells to surface (biofilm formation)
- prevent desiccation (keeps dry)

Question 6

what is the function & structure of flagella?

Answer 6

structure:
- filament, hook, & basal body
- made up of H antigen

function;
- motility
- works by roation

Question 7

what is the differences between prokaryotes and eukaryotes in flagella?

Answer 7

prokaryotes:
- made up of flagellin proteins
- movement is proton driven
- rotation

eukaryotes:
- made up of tubulin
- movement is ATP driven
- blending movement