Practice Exam 2

Practice Exam 2 - Biology 101 1.The fol Practice Exam 2...

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Biology 101 Practice Exam 2 Porter 1.The fol- lowing graphs depict the effect of pH on the amount of product pro- duced in chem- ical reactions with enzyme A and enzyme B. What is the best explanation of the observed graphs? Units of Product 5 Produced 4 Enzyme A. 3 Enzyme B. 2 1 2 4 6 8 10 12 14 2 4 6 8 10 12 14 pH pH a. Enzyme B forms the product faster that enzyme A. b. Enzymes change the energy of activation for a chemical reaction. c. Enzyme A and B are catalyzing the same chemical reaction at different pH values. d. The optimal pH for enzyme A is 8 and the optimal pH for enzyme B is 4. e. Activity of enzymes increase as pH increases. 2. The binding site for the substance that the enzyme acts upon is the a. noncompetitive inhibitor b. competitive inhibitor c. substrate d. allosteric site e. active site 3.The removal or loss of electrons from a compound is known as a..oxidation b. reduction. c.dehydration d.phosphorylation. e.a nonreversible chemical reaction. 4. When NAD + functions as a coenzyme it will be a. oxidized to NADH b. phosphorylated. c.reduced to NADH. d.denatured. e.none of these 5.As the product of a chemical reaction increases the activity of the enzyme catalyzing the reaction can be controlled. This regulation is called: a. competitive inhibition. b.homeostasis. c.feedback inhibition d. noncompetitive inhibition. e.alternation of activation 6.Which of the following is most closely associated with photosynthesis? a. FADH+ b.FADH 2 c.NADP + d.NAD + e.NADH 7. In addition to light energy, plants need which of the following to carry on photosynthesis? a. H 2 O b.CO 2 c.O 2 d. H 2 O, CO 2. and O 2 e. H 2 O and CO 2 8.The conversion of solar energy to chemical energy occurs during a. glycolysis. b.photosynthesis. c.respiration. d.fermentation. e.chemosynthesis. 9. Heterotrophs obtain their energy and carbon from a. the sun and atmosphere directly. b.consuming autotrophs or other organisms. c. inorganic sources from the soil. e. all of these 10. The oxygen released in photosynthesis comes from a. carbon dioxide. b.glucose. c. RuBP (ribulose bisphosphate). d.water. e.atmospheric oxygen. 11.The location of the electron transport chain in the mitochondrion: a. thylakoid. b.stroma. c.intermembrane space. d.matrix. e.cristae 12.Which of the following is NOT associated with the light-dependent reactions? a. ATP b.Thylakoids c.carbon dioxide d.chlorophyll e.Water
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13.Thylakoid disks are stacked in groups called a. grana. b.stroma. c.matrix. d.cristae e.photosystems 14.Cholorphyll absorbs a. infrared energy of the electromagnetive spectrum. b. ultraviolet wavelengths of the electromagnetic spectrum. c. some visible wavelengths of the electromagnetic spectrum. d.
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This note was uploaded on 06/14/2011 for the course BIOL 101 taught by Professor Chattergee during the Fall '06 term at South Carolina.

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Practice Exam 2 - Biology 101 1.The fol Practice Exam 2...

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