What are the primary structures and functions of macromolecules?

There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions. Combined, these molecules make up the majority of cell's dry mass (recall that water makes up the majority of its complete mass)

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation: