Critical Thinking Questions Chapter 2
1. Your best friend has decided to begin frying his breakfast eggs in margarine instead of butter because he has heard that eating butter is bad for his heart. Has he made a wise choice? Are there other alternatives? Margarine is made from vegetable oils, so it contains unsaturated fats polyunsaturated and monounsaturated fats. These types of fats help reduce low-density lipoprotein (LDL), or "bad," cholesterol when substituted for saturated fat. The only problem is that some margarine contains plenty of trans fat. The more solid the margarine the more trans fat it contains. There are other alternatives such as Extra virgin olive oils, nut butter, coconut oils and etc.
2. A 4-month-old baby was admit to the hospital with a temperature of 102°F (38.9°C). Why is it critical to treat the fever as quickly as possible? Its critical because a temperature exceeding 100.4 can be life-threatening, especially in infants. The increased temperature can cause denaturing of structural proteins and vital enzymes. When this happens, the proteins become nonfunctional. If the denatured enzymes are required for reactions that are necessary for life, the infant could die.
3. During chemistry lab, Maria places sucrose (table sugar) in a glass beaker, adds water, and stirs. As the table sugar disappears, she loudly proclaims that she has chemically broken down the sucrose into fructose and glucose. Is Maria’s chemical analysis correct?
Simply adding water to the table sugar does not cause it to break apart into monosaccharides. The water acts as a solvent, dissolving the sucrose and forming a sugar- water solution. To complete the breakdown of table sugar to fructose and glucose would require the presence of the enzyme sucrose.
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