chapter 6

Question 1

What do membranes do?

Answer 1

1. ) compartmentalize
2. ) import and export of molecules
3. ) receive information
4. ) capacity for movement and expansion

Question 2

What is the main component to biological membranes?

Answer 2

lipids.

Question 3

How are lipids defined?

Answer 3

Their solubility

Question 4

What is the lipid structure known for having?

Answer 4

larger hydro-carbon domains, with non-polar covalent bonds, thus making lipids extremely hydro-phobic

Question 5

How do fats form?

Answer 5

Fats form via dehydration reactions, they bond to the three hydroxyl molecules located on the glycerol chain.

Question 6

What bonds do the fatty acids use to bond with hydroxyl groups located on the Glycerol?

Answer 6

condensation reaction

Question 7

Are fats polymers?

Answer 7

Nah, the fatty acids aren’t bonded to one anther.

Question 8

What are the components of a phospholipid?

Answer 8

1. ) hydrophilic head
2. ) phosphate group
3. ) glycerol
4. ) nonpolar hydrophobic tail

Question 9

What is the main constituent of biological membranes?

Answer 9

phospholipids.

Question 10

What classifies a sterols from anther membrane lipid?

Answer 10

It also contains a large hydro-carbon domain but its domain consists of hydro-carbon rings.
- a hydroxyl group on the end

Question 11

t/f lipids are amphipathic?

Answer 11

True
ami- dual
pathic- loving

Question 12

What happens when an amphipathithic lipids are placed in an aqueous environment?

Answer 12

They will spontaneously form micelles or bilayers.

polar end out and non polar end inside.

Question 13

How does one study lipids?

Answer 13

Liposomes and planar bilayers ( membrane permeability)