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The entire biological molecules topic for A-Level Biology in one video 🧬 Carbohydrates, lipids, proteins, nucleic acids, and enzymes. Everything you need for the A-Level exam, in around 8 minutes. 📌 Save this for when you come to revise. ⏱ Chapters: 0:00 Intro 0:11 Carbohydrates: monomers to polymers 0:48 Polysaccharides (cellulose, starch, glycogen) 1:28 Lipids 2:41 Proteins 3:31 Nucleic acids 4:25 DNA vs RNA 5:23 Enzymes: how they work 6:09 Enzyme models (lock and key vs induced fit) 6:51 Rate of reaction factors What's covered: → Carbohydrates: monosaccharides (glucose, fructose, galactose), condensation reactions, and the three big polysaccharides (cellulose, starch, glycogen). → Lipids: saturated vs unsaturated fatty acids, triglycerides, steroid hormones, and the phospholipid bilayer. → Proteins: amino acids, peptide bonds, and the four levels of protein structure. → Nucleic acids: DNA and RNA structure, nucleotides, base pairing, and the key differences between them. → Enzymes: activation energy, the enzyme cycle, lock and key vs induced fit, denaturation, and the four factors affecting rate. The key idea running through the whole topic: same monomers, different structures, very different jobs. Free A-Level Biology notes, quizzes, flashcards, and past papers → cognito.org #alevel #biologyalevel #alevels #biology #gcsescience
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