Cell Membranes

Question 1

The pH inside a cell is usually
(higher/lower) that the pH outside the cell.

Answer 1

Lower (pH)

Question 2

Increased numbers of saturated phospholipids…. (more than one answer may apply)

a. increases membrane packing

b. decreases membrane packing

c. reduces viscosity

d. increases viscosity

Answer 2

a. increases membrane packing and d. increases viscosity

Question 3

When the temperature increases, membranes will want to become more
fluid
(fluid/viscous) but are regulated by the amount of
cholesterol
in the membrane.

Answer 3

More fluid and regulated by cholesterol

Question 4

Phospholipid tails are made from which two elements?

Answer 4

Carbon and hydrogen make up this lipid component!

Question 5

Which of these has a net negative charge?

a. Phosphatidylcholine

b. Phosphatidylserine

c. Phosphatidylethanolamine

Answer 5

b. Phosphatidylserine

Question 6

Which group on cholesterol aligns with the phospholipid heads?

a. CH chain

b. Benzene ring

c. OH

d. NH3

Answer 6

c. OH (group within cholesterol structure)