Cells must secrete enzymes that degrade macromolecules into their subunits before they can use these compounds.

Question

Quizplus · Accepted Answer

Macromolecules such as proteins, carbohydrates, and lipids cannot be directly used by cells. They must first be broken down into their subunits, such as amino acids, monosaccharides, and fatty acids, respectively. This is accomplished through the secretion of enzymes by the cell or through the uptake of pre-digested compounds by transporters on the cell membrane.

Cells Must Secrete Enzymes That Degrade Macromolecules into Their Subunits