Biological membranes & Transport across membrane

Identify cholesterol molecule

• structure a

• structure b

• structure i

• structure h

• structure c

Describes the arrangement of the cell membrane as bendable and made of many parts.

• the fluid mosaic model

• the major mobility model

• the crazy cell model

• the cell theroy model

Choose the explanations of phospholipid (2ANS)

• Polar = Hydrophilic head

• Non-polar = Hydrophilic head

• Polar = Hydrophobic head

• Non-polar = Hydrophobic head

___________ have 2 functions in the cell membrane. 1.) They act like gatekeepers, only let certain things in.  2.) Enzyme receptors embedded in the membrane.

• Carbohydrates 

• Proteins 

• Phospholipids 

• Cholesterol

What do A, B, C and D represent in the following figure?

• A : carrier protein, B : symport, C : uniport, D : antiport

• A : carrier protein, B : uniport, C : antiport, D : symport

• A : carrier protein, B : antiport, C : symport, D : uniport

• A : carrier protein, B : uniport, C : symport, D : antiport