Question

what biomolecule is the cellular membrane made out of?
amino acids
water
carbohydrates

Explanation:

Cellular membranes are primarily composed of phospholipids, which are a type of lipid. Among the given options, none are correct as the main component. But amino - acids are building blocks of proteins which are also present in cell membranes in smaller amounts. Water is not a biomolecule that makes up the membrane structure. Carbohydrates are present on the membrane surface but are not the main structural component.

Answer:

None of the above options are the main biomolecule making up the cellular membrane. But if we consider secondary components, amino acids are part of membrane - associated proteins.