Carbohydrates and Lipids
This lesson connects molecular mechanisms, cell behavior and biological evidence. Instead of memorizing isolated terms, follow what changes, what is measured, where the process occurs and why the outcome matters to a living system.
Big idea
Simple sugars such as glucose are small carbohydrate units used in respiration and biosynthesis. Glycosidic bonds join many monosaccharides into starch, glycogen or cellulose with different functions.
Learning goals
- Monosaccharides: Simple sugars such as glucose are small carbohydrate units used in respiration and biosynthesis.
- Polysaccharides: Glycosidic bonds join many monosaccharides into starch, glycogen or cellulose with different functions.
- Triglycerides: A triglyceride forms from glycerol and three fatty acids and stores concentrated chemical energy.
- Saturated and unsaturated fats: Fatty-acid double bonds create bends that affect packing and melting behavior.
- Phospholipids: A hydrophilic phosphate head and hydrophobic tails make phospholipids assemble into bilayers.
Core concepts
1. Monosaccharides
Simple sugars such as glucose are small carbohydrate units used in respiration and biosynthesis.
Observation or application: Glucose enters cellular respiration or joins other glucose units.
2. Polysaccharides
Glycosidic bonds join many monosaccharides into starch, glycogen or cellulose with different functions.
Observation or application: Plants store glucose as starch and build cell walls from cellulose.