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Lipids and Membranes - Coggle Diagram
Lipids and Membranes
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Lipids
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They have a high number of hydrogen and carbon atoms, but very few oxygen atoms
Lipids are examples of macromolecules, which are very large organic molecules
triglycerides
Structure
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fatty acids
Molecules with a carboxyl group (-COOH) on one end, attached to a hydrocarbon tail
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ester bonds
These are covalent bonds formed between the -COOH group of the fatty acid and the -OH group of a glycerol
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Function/uses
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Energy store
They re insoluble in water and do not affect the water potential of the cell so can be used as storage
They release a higher proportion of hydrogen and carbon atoms but hardly any oxygen so they release 2x energy than glucose
Insulation
The lipids can be stored in tissue and acts as an electrical insulator to keep heat closer to the body’s core
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phospholipids
Structure
The molecule has the exact same structure as a triglyceride, except for the addition of a phosphate group head
phosphate head
This molecule consists of a phosphate molecule, which is bonded to 2 oxygen and two -OH molecules
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