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Carbohydrates can be simple sugars (monosaccharides) like glucose, or they can be made up of multiple sugar units (polysaccharides) like glycogen. They are important in biology as a source of …

Unit 3: Macromolecules About this unit This unit is part of the Biology archive. Browse videos and articles by topic. For our most up-to-date, mastery-enabled courses, check out High School Biology …

Zoom into the world of biomolecules as you explore the structure and function of proteins, nucleic acids, carbohydrates, lipids, ATP, and more! Explore some of the ways that these molecules regulate …

Not all fats and carbohydrates are “bad.” Information about different kinds of diets can be confusing and may lead someone to believe that all fats or all carbohydrates are unhealthy. This simply isn’t the …

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There are four major biological macromolecules: carbohydrates, lipids, proteins, and nucleic acids. Which of the following makes carbohydrates unique from the other biological macromolecules?

Practice exercises on the elements of life in AP Biology, covering key concepts in biochemistry and molecular biology.

In this article, we’ll learn more about each type of carbohydrates, as well as the essential energetic and structural roles they play in humans and other organisms.

For example, this is a model of ATP, adenosine triphosphate, as we study biology, you'll see that it's often viewed as the currency of energy, the molecular currency of energy in biological systems.