Chapter 3 Section 2: Biochemistry-Review – Flashcards
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Why do phospholipids orient in a bilayer when in a watery environment, such as a cell?
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Because phospholipids have a hydrophobic tail.
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Describe how the three major types of lipids differ in structure from one another.
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1) triglycerides: 3 molecules of fatty acid, 1 alcohol glycerol molecule 2)phospholipids: 2 fatty acid molecules, 1 alcohol glycerol molecule 3) waxes: long fatty acid chain and a long alcohol chain
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What are the functions of the two types of nucleic acids?
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DNA contains the information that determines the characteristics of its cell activities. RNA leads protein synthesis and transfers info from DNA.
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Before a long race, runners often "carbo load." This means that they eat substantial quantities of carbohydrates. How might this help their performance?
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Carbohydrates are made up of simple sugars. When the runners run, they obtain more energy because the carbohydrates go through dehydration synthesis to convert from a monosaccharide to a polysaccharide.
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High temperatures weaken bonds within a protein molecule. How might this explain the effects of using a hot curling iron or rollers in one's hair?
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Hair is made up of the protein keratin. When a curling iron or rollers is used on the hair, bonds are broken by the high temperatures. Then, they reform to form curlier hair.
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You want to eat more unsaturated than saturated fats. Name examples of foods you would eat more of and less of.
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Saturated fats include butter and fats in red meat. Unsaturated fats are found in plant seeds.
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