Unit 2: Calculate water pressure

Question 1

Integral vs peripheral proteins in the membrane

Answer 1

(1) integral proteins are embedded (stuck) in the whole membrane bilayer

(2) peripheral proteins are located on either the inner or outer surface of the phospholipid bilayer.

Question 2

Integral proteins are ________ (hydrophilic, hydrophobic)

Answer 2

They are amphipathic (both), with at least one hydrophobic region.

Question 3

Water potential

Answer 3

a measure of the potential energy in water as well as the difference between the potential in a given water sample and pure water

Question 4

calculate water potential

Answer 4

water potential = solute potential + pressure potential

Question 5

solute potential

Answer 5

tell us if there are solutes dissolved in the solution

Question 6

pressure potential

Answer 6

tell us is there is any pressure acting on the solution
(if the solution is hypertonic or hypotonic)

Question 7

what is the water potential of pure H20?

Answer 7

0, because it has no solutes and we assume it’s isotonic

Question 8

when you put solutes in a sample, the water potential goes _____

Answer 8

down (there is less space for water)

Question 9

When you add pressure, pressure potential _____

Answer 9

decreases