Plasma Membrane

Question 1

-Molecules move down the concentration gradient with the help of carrier proteins and do not require energy

Answer 1

> Facilitated diffusion

Question 2

Which process is involved in the movement of water molecules from soil into the root hairs of a plant?

Answer 2

> Osmosis

Question 3

An experiment shows that plasma membrane of red blood cell loses its shape when immersed into 1.5% sodium chloride solution.
What causes the red blood cell to lose its shape?

Answer 3

> Water diffuses out of the cell by osmosis

Question 4

▪️The movement of molecules or ions
▪️Need energy that comes from ATP
▪️Result in the accumulation or elimination of molecules or ions from the cells

Answer 4

> Active transport

Question 5

A farmer found out that his crops wilt after using a type of fertiliser.
What should he do to overcome this problem?

Answer 5

> Water the plants

Question 6

What happens to erythrocytes when immersed in distilled water?

Answer 6

> Burst

Question 7

Distilled water diffuses into potato strip and causes it to increase in mass.
What is the process involved?

Answer 7

> Osmosis

Question 8

A housewife noticed that cucumber slices become soft when immersed in salt solution.
Which process causes the softening of the cucumber slices?

Answer 8

> Water diffuses out from the cucumber slices by osmosis

Question 9

The current theory on the structure of the plasma membrane is best described by the ………

Answer 9

> The Fluid Mosaic Model

Question 10

Which process occurs through facilitated diffusion?

Answer 10

> Absorption of amino acid in the small intestine