Regulate enzyme activity in metabolic pathways.
1)activators
2)neurons
3)inhibitors
3)glucose molecules
4)lipids
select all that apply to the question. this question has multiple answers.

Lipids

Explanation:

Cell membrane contain proteins which makes selectively permeable membrane. The membrane protein can also be stored lipid bilayer together with the enzyme.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

the answer is c. altitude. hope this ! #brainiac