Summary:
This week’s lecture explored macromolecules — the four essential categories of molecules that make up living things once you strip away water and minerals. Carbohydrates, lipids, proteins, and nucleic acids aren’t just abstract molecules — they’re behind your daily energy, your physical structure, and even your genetic inheritance.
Highlights:
Carbs = short-term energy. That morning bagel fuels your brain lecture by lecture.
Lipids = long-term storage. Think of “Fat Bear Month” in Alaska — and why human babies are extra squishy.
Proteins = structure + enzymes. From collagen in your skin to enzymes driving metabolism.
Nucleic acids = ATP + DNA. The energy currency of cells and the instruction manual for life.
Genes & health. Some genetic quirks (like heart disease risk) keep persisting because they strike late in life.
Cancer as rebellion. A reminder that your cells are supposed to play the same cooperative game. When they don’t, biology gets messy.
