Cell Surface Membrane

Question 1

Phospholipid

Answer 1

Allows lipid-soluble substances through water and prevents water-soluble substances passing through

Question 2

Glycoprotein

Answer 2

A branching carbohydrate portion of a protein which acts as a recognition site for chemicals eg hormones

Question 3

Glycolipid

Answer 3

Acts as a recognition site eg for cholera toxins

Question 4

Channel protein

Answer 4

Special arrangement of proteins embedded in a cell providing a hydrophilic passageway for water and small, polar ions

Question 5

Carrier proteins

Answer 5

Facilitates diffusion of molecules across the cell membrane

Question 6

Cholesterol

Answer 6

Used for stability/flexibility

Question 7

Receptor Sites

Answer 7

A protein on a cell wall that binds with specific molecules so that they can be absorbed into the cell

Question 8

Enzymes and coenzymes

Answer 8

An enzyme is a molecule that speeds up the ROR. A coenzyme enhances the action of the enzyme

Question 9

Intrinsic proteins

Answer 9

Proteins spanning the bilayer . Can act as carriers for water-soluble substances

Question 10

Extrinsic Proteins

Answer 10

Act as receptors for hormones and neurotransmitters or involved in cell recognition