An unsaturated fatty acid differs from a saturated one in that it
Correct answer: A. contains one or more carbon to carbon double bonds in its hydrocarbon chain
- A. contains one or more carbon to carbon double bonds in its hydrocarbon chain
- B. contains more hydrogen atoms per carbon
- C. has no carboxyl group
- D. cannot be used in respiration
Explanation
Each double bond puts a kink in the chain, so the molecules pack together less closely and the fat has a lower melting point, which is why plant oils are liquid while animal fats are solid at room temperature. Saturated means the chain carries the maximum possible hydrogen, so the unsaturated form has fewer hydrogens, not more. Diets high in saturated fat are linked with atherosclerosis.
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About Lipids
Lipids include fats, oils, waxes, phospholipids and steroids, which are largely insoluble in water and soluble in organic solvents. Coverage includes glycerol and fatty acids, ester bond formation, saturated and unsaturated fats, triglyceride functions, and phospholipids in cell membranes.
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