Inner Membrane

Question 1

What is the composition of the plasma membrane?

Answer 1

Phospholipid bilayer

Membrane proteins

Question 2

Role of Plasma Membrane

Answer 2

Permeability barrier
Protein anchor
Energy conservation

Question 3

What would a cell do to its lipids if the temperature dropped significantly?

Answer 3

The cell would produce more unsaturated acyl chains in its membrane to avoid the lipids from packing together

Question 4

Undecaprenyl Pyrophosphate

Answer 4

Intermediate in biosynthesis

Carrier molecule for flipping things across the membrane

Question 5

Types of Integral Membrane Proteins

Answer 5

Monotopic alpha helix
Polytopic alpha helices
Polytopic beta barrel

Question 6

Types of Peripheral Membrane Proteins

Answer 6

Alpha helix
Loops
Acylated
Ionic

Question 7

What would happen to a cell if it were put into water for 30 minutes?

Answer 7

The cell would become hypotonic so water will rush into the cell causes it to swell

Question 8

Which of these molecules are most likely to get across a membrane?

• water
• nitrogen
• potassium ion
• alanine
• lactose
• lead ion

Answer 8

water
nitrogen
The other ones need transporters to get across the membrane