multiple questions: 1. How Does the proption of saturation and unsaturation in m

ID: 70181 • Letter: M

Question

multiple questions:

1. How Does the proption of saturation and unsaturation in membrane lipids affect the fluidity of the cell memebrane?

a. membrane fluidity increases with an increase in the percentage of unsaturation

b.membrane fluidity decreases with an increase in the percentage of unsaturation.

c.membrane fluidity increase with an increase in the percentage of saturation.

d.membranes are most fluid when there is an egual proportion of saturation and unsaturation.

e. membrane fluidity depends only on the size of the carbon chains and not on the proportions of saturation and unsaturation.

2. When substances move through a plasma membrane and down concentration gradients this is called?

a.Active transport b.Passive transport c. Endocytosis d.Exocytosis e.Infusion

3. Molecules which permeate a plasma membrane by facilitated diffusion .

a. Require and expenditure of energy b. Require the aid of transport proteins

c. Move from an area of low concentration to an area of high concentration

d. Do so more quickly than crossing by simple diffusion

1. A) Membrane fluidity increases with an increase in the percentage of unsaturation.

2. a.Active transport

3. b. require the aid of transport proteins.

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