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exam 2 fall 06

exam 2 fall 06 - BIO 208 001/201 Fall 2006 Examination 2...

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BIO 208 – 001/201 / Fall 2006 / Examination 2 Cell phones: All cell phones MUST be turned off and put away during an examination period. They must not be turned back on again until after exiting the examination room. USE OF A CELLPHONE (this includes receiving calls) DURING AN EXAMINATION PERIOD IS EVIDENCE OF CHEATING AND WILL BE TREATED AS SUCH. In addition to the circumstance listed above, the following activities are considered evidence of cheating: 1) Any talking to another student during an examination. 2) Looking at another students work during an examination, or allowing another student to look at your work. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. Which of the following is true about enzymes? a. Enzymes are catalysts and, therefore, increase the rate of a reaction while not being permanently altered by the reaction. b. Enzymes are proteins that can be denatured by changes in pH or temperature. c. Enzymes are highly specific for the substrates they react with and catalyze only one or a limited set of possible reactions with those substrates. d. All of these are true about enzymes e. Only 2 of the statements a, b and c are true but not all three. 2. __________ is the endergonic synthesis of molecules. a. metabolism b. anabolism c. catabolism d. dephosphorylation 3. An unfavorable reaction that requires an input of energy in order to proceed is __________. a. exergonic b. endergonic c. impossible d. none of these 4. Which of the following represents work normally done by cells? a. synthesis of complex molecules b. nutrient uptake and waste elimination c. internal and external movement d. All of these e. Only a and c above but not b 5. You grow a FACULTATIVE anaerobe under AEROBIC conditions in a medium containing glucose as the sole carbon and energy source. Then, you suddenly SHIFT this culture to ANAEROBIC conditions. No other suitable inorganic final-electron acceptors are available to substitute for oxygen. During this shift in metabolism, the cells will do all of the following EXCEPT a. Quit producing ATP by substrate-level phosphorylation. b. Quit the complete oxidation of glucose to carbon dioxide. c. Quit using the electron-transport system as a major route of hydrogen carrier reoxidation. d. Quit using the tricarboxylic acid cycle. e. Quit making a large quantity of ATP per molecule of glucose.
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6. Let us assume that all of the glucose consumed by a yeast cell is converted into carbon dioxide and ethanol. How many molecules of CARBON DIOXIDE and how many molecules of ETHANOL will be formed from each molecule of glucose? a. Two of carbon dioxide and two of ethanol. b. One of carbon dioxide and two of ethanol. c. Three of carbon dioxide and one of ethanol.
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exam 2 fall 06 - BIO 208 001/201 Fall 2006 Examination 2...

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