Plasma Membranes Flashcards
1
Q
Why does facilitated diffusion not require metabolic energy
A
Particles have their kinetic energy from movement down comc gradient
2
Q
Why can glucose not pass through using simple diffusion
A
Large molecule
And phospholipid act as as a barrier
3
Q
Role of membranes within cells
A
Compartmentalise reactions
Protect against other reactions such as lysosomes
Create concentration gradient.
Provide attachment site for enzymes
4
Q
Role of membrane in rough en do plasmid reticulum
A
Compartment,wise reactions
Hold ribosomes In place
Package proteins into vesicles
5
Q
Explain how structure of phospholipid molecules allows formation of plasma membranes
A
Head is hydrophilic
Tail is hydrophobic
Head interacts with water, tail interact w tails of other phospholipid to for, a bilayer
