Quiz05-solutions

Quiz05-solutions - 004 10.0 points Gel electrophoresis is...

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Version 097 – Quiz05 – Walker – (53985) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. Select the BEST answer among those listed. 001 10.0 points Saccharides are made out oF 1. C, H, and S. 2. C, H, and N. 3. C. 4. C, H, and O. correct 5. C and H. Explanation: 002 10.0 points The role oF what in your diet is to produce hormones, body Fat, and energy? 1. carbohydrates 2. protein 3. DNA 4. vitamins 5. Fats correct Explanation: 003 10.0 points The double helical structure oF DNA is stabi- lized predominantly by 1. ionic bonds. 2. covalent bonds. 3. van der Waals Forces. 4. water. 5. hydrogen bonds. correct Explanation: The complementary bases on the two strands oF the double helix are held together by hydrogen bonds. Covalent bonds between sugar and phosphate groups only hold to- gether the two individual strands; they do not anchor the strands together.
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Unformatted text preview: 004 10.0 points Gel electrophoresis is used to separate strands oF DNA by size. The negatively charged back-bone oF the DNA moves the strands From a negative electrode toward a positive electrode through a gel oF agar. Which sizes move Far-ther during the process? 1. The larger strands oF DNA move Farther. 2. They both move the same distance since the phosphates are identically charged. 3. The shorter strands oF DNA move Farther. correct Explanation: It is easier For the smaller segments to travel through the gel. The smaller they are, the less entangled they become. 005 10.0 points A protein is a linear polymer composed oF 1. lipid - base - lipid - base. 2. amino acid - amino acid. correct 3. base - sugar - base - sugar. 4. sugar - amino acid - sugar - amino acid. Explanation: Proteins use condensation polymers oF amino acids....
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