Lipids

Lipids: New research questions the long-held belief that proteins alone drive evolution, bringing attention to the crucial role of lipids.

• About: Lipids are fatty, wax-like hydrocarbons made of carbon and hydrogen.
• Presence: Found in blood and all body cells; integral to cell membranes.
• Functions: Provide cell structure → Control entry and exit of substances in cells → Aid in energy storage and movement → Help absorb vitamins and produce hormones.
• Solubility: Non-polar, hence insoluble in water, and soluble in non-polar solvents like chloroform.
• Sources: Abundant in fried foods, animal fats, and dairy (e.g., butter, cream, cheese).
• Types of Lipids: Triglycerides → Steroid Hormones → Bile Salts (from cholesterol) → Fatty Acids →  Phospholipids & Cholesterol.