Which statement best explains the effect on membrane permeability of cholesterol and/or temperature?
a. adding cholesterol increases permeability because its steroid rings decrease the density of the hydrophobic membrane interior.
b. adding cholesterol reduces permeability because its steroid rings fill gaps in the hydrophobic membrane interior.
c. increasing temperature increases permeability because it increases the strength of hydrophobic interactions in the membrane interior.
d. adding cholesterol increases permeability because its steroid rings increase the density of the hydrophobic membrane interior.

B. adding cholesterol reduces permeability because its steroid rings fill gaps in the hydrophobic membrane interior

Explanation:

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.