Fatty acids are components of lipids. Unsaturated fatty acids contain _ double bonds.
Correct answer: C. Multiple
- A. No
- B. One
- C. Multiple
- D. Six
Explanation
Unsaturated fatty acids contain multiple double bonds because they lack the maximum number of hydrogen atoms bonded to their carbon chain, allowing carbon atoms to form additional double bonds. These double bonds create kinks in the hydrocarbon chain, preventing tight packing of molecules and leading to lower melting points. The presence of multiple double bonds increases fluidity and reactivity, distinguishing polyunsaturated fatty acids from saturated ones that have only single bonds between carbon atoms.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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