In this episode of Bio On The Go, we continue our macromolecule series with the true workhorses of biology: proteins. Aligned with AP Biology CED 1.7 (Fall 2025), we unpack how proteins are built from amino acids, explore their four levels of structure, and explain how shape determines function. Whether you're reviewing for a test or learning it for the first time, this episode will help you understand why proteins aren't just important—they’re essential.

In this episode, we dive deep into the world of lipids—those hydrophobic molecules that play a critical role in cell structure and energy storage. From triglycerides to phospholipids and steroids, we break down their structure, function, and biological importance. Why don’t lipids mix with water? How do phospholipids form the basis of the cell membrane? And what makes saturated and unsaturated fats different at the molecular level? Whether you're cramming for the AP Bio exam or just want a clearer understanding of macromolecules, this is your go-to guide for mastering CED 1.5.

In this episode of Bio On The Go, we dive into the essential elements of life (CED 1.2) and kick off our macromolecule series with a deep look at carbohydrates (CED 1.3). What exactly are macromolecules, and why are they so important for life? We’ll break it down starting with carbon—the versatile backbone of biological molecules—and walk through the structure, function, and examples of carbohydrates. From monosaccharides to polysaccharides, you'll learn how sugar isn’t just sweet—it’s essential. Perfect for review, reinforcement, or getting ahead, this episode keeps it short, sharp, and student-friendly.