If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Unit 5: Macromolecules

400 possible mastery points

About this unit

This unit is part of the Biology library. Browse videos, articles, and exercises by topic.

Learn about monomers, polymers, dehydration synthesis, and hydrolysis reactions! These will get you all set to learn more about the different types of macromolecules.
Do you have a sweet tooth? Learn more about different types of sugar molecules: their structure, their chemical behavior, and how they can combine to form chains. Starring glucose (blood sugar), sucrose (table sugar), and fructose (fruit sugar).
Did you know that fats are beautiful little molecules with long, trailing hydrocarbon tails? Learn about the structure and function of fats and other lipids, including cholesterol and the phospholipids that make up cell membranes.
Level up on the above skills and collect up to 160 Mastery points
Maybe you've heard DNA discussed as the "genetic material." But what exactly is DNA, when you get right down to it? Learn more about the structure and properties of DNA and its nucleic acid cousin, RNA.
Proteins: the amazing machines of the cell! Learn about the amino acids that proteins are made of and how they are connected by peptide bonds. Special bonus: learn how proteins get their shapes and why this so important for their function.
Level up on the above skills and collect up to 160 Mastery points
Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 400 Mastery points!
Biology is brought to you with support from the Amgen Foundation