Lipids can be grouped as saturated or unsaturated.On the other hand, fatty acids have an acid group at one end of the molecule and a hydrocarbon chain. The remaining positions are occupied by hydrogen atoms. Glycerol has three carbon atoms and a hydroxyl group attached to it. Lipids have two molecules – fatty acids and glycerol.Their composition is way different than proteins and polysaccharides. Lipids don’t have repeating monomeric unit making them a polymer.However, they have a lower proportion of water when compared to other molecules like carbohydrates. Lipids have three elements: carbon, oxygen, and hydrogen.The structure of lipids is outlined below: When there’s an abundance of carbohydrates in your diet, the excess carbohydrates will be converted into triglycerides – synthesizing fatty acids from Acetyl-CoA through lipogenesis and happens in the cell’s endoplasmic reticulum. Picture Source: Where do lipids come from? Image 3: A representation of the types and sources of lipids as seen on the image above.
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