Chapter 8.1 Flashcards
1
Q
Why is the cell membrane semi permeable
A
1) mediated by various channels and carriers that poke holes in the membrane
2) Membrane itself
- >fat-soluble compounds go through
2
Q
Do cell walls of plants, bacteria and fungi contain higher levels of carbs
A
-yes
3
Q
Can phospholipids move rapidly in the plane of the membrane through diffusion
A
- yes
- >when the membrane is tagged with different labels, the tags will migrate with their associated lipids
4
Q
What are lipid rafts
A
- they are collections of similar lipids with or without associated proteins
- > that serve as attachment points for other biomolecules
- > lipid rafts and proteins also travel in the plane of the membrane but more slowly than phospholipids
5
Q
Do flippases assist in the flip between layers
A
-yes
