Lipids/proteins

Question 1

What is the weight percent of Phosphatidylcholine in the Nuclear membrane?

Answer 1

42

Question 2

What is the weight percent of Cholesterol in the Golgi Apparatus?

Answer 2

3

Question 3

What is the weight percent of Phosphatidylserine in the Plasma membrane?

Answer 3

0

Question 4

How do unsaturated fatty acids affect the hydrocarbon tails?

Answer 4

Unsaturated fatty acids have kinks in their tails, which increases fluidity in the bilayer.

Question 5

What effect does cholesterol have on membrane fluidity?

Answer 5

Cholesterol reduces fluidity by stabilizing extended chain conformations of the hydrocarbon tails of fatty acids.

Question 6

Which type of membrane has a higher percentage of unsaturated fatty acids?

Answer 6

Plant membranes

Question 7

What is characteristic of animal membranes regarding cholesterol?

Answer 7

Animal membranes contain cholesterol, making them less fluid (more rigid) than plant membranes.

Question 8

What do plant sterols do in relation to dietary cholesterol?

Answer 8

Plant sterols can act as natural cholesterol blockers, interfering with the uptake of dietary cholesterol.