How it works
This macromolecules graphic organizer puts the four groups side by side and asks the same three things of each, so they are easy to compare.
Read the full guide
What each one does
Carbohydrates store energy, as starch and glycogen do, and give structure, as cellulose does in plants. Lipids store energy too and make up cell membranes. Many proteins are enzymes that speed up reactions; others give cells their structure or carry molecules from place to place. Nucleic acids carry and store the information of a cell.
- DNA and RNA are the two main kinds of nucleic acid, so both go in the Example box for nucleic acids.
- Fats are one kind of lipid. Waxes, phospholipids and sterols such as cholesterol are lipids too.
Questions and answers
What are the four macromolecules and their building blocks?
The four on this chart are carbohydrates, lipids, proteins and nucleic acids. Carbohydrates are built from simple sugars, proteins from amino acids and nucleic acids from nucleotides. A fat, one kind of lipid, is glycerol joined to three fatty acids.
What is the difference between a monomer and a polymer?
A monomer is a small molecule that can join with other monomers. A polymer is the chain or network they form. Glucose is a monomer, and starch, glycogen and cellulose are polymers made from it.
What is the difference between a biomolecule and a macromolecule?
A biomolecule is any molecule made by a living thing, large or small. Macromolecules are the large ones: proteins, carbohydrates, lipids and nucleic acids. So the same chart works as a biomolecules graphic organizer.