Test 2 with answers B

Test 2 with answers B - Biol. 101 Test 2 DeSaix 7 October...

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Biol. 101 Test 2 – DeSaix 7 October 2010 Name ______________________ Print your name, last name first, and PID number legibly on your scantron. Bubble in both below. Each answer is worth 2 points. The test is worth 90 points. Choose the best answer and use only # 2 pencils to answer. Sign the pledge on your answer sheet. The last question will be used only if another question has to be deleted. Turn in your scantron in alphabetical order at the front. Keep your test paper with answers to check against the key posted on Blackboard after the test. Your score will be on Connect Carolina. 1. Conversion of glucose to pyruvic acid: a. can occur in the absence of oxygen . b. depends on the presence of light. c. Does not require ATP. d. Does not produce ATP. 2. A mutant protist is found in which some mitochondria lack an inner mitochondrial membrane. Which of the following pathways would be completely disrupted in these mitochondria? a. Chemiosmosis b. Alcoholic fermentation c. The electron transport system d. Glycolysis e . Both a and c 3. Fermentation is essentially glycolysis plus an extra step in which pyruvic acid is reduced to form lactic acid or alcohol and CO2. This last step: a. Removes poisonous oxygen from the environment b. Extracts a bit more energy from glucose c. Enables the cell to recycle NAD+ d. Inactivates toxic pyruvic acid e. Enables the cell to make pyruvic acid into substances it can use 4. Inside an active mitochondrion, most electrons follow which pathway? a. Glycolysis – NADH – oxidative phosphorylation – ATP – oxygen b. Krebs cycle – NADH – electron transport chain – ATP c. Electron transport chain – Krebs cycle – ATP d. Pyruvate – Krebs cycle – ATP – NADH – oxygen e. Krebs cycle – NADH – electron transport chain – oxygen 5. The oxygen which is the final electron and proton acceptor of the electron transport system comes from: a. Glucose b. Water c. Air d. Carbon dioxide 6. During which of the following phases of cellular respiration does substrate-level phosphorylation take place? a. Glycolysis b. The Krebs cycle c. “grooming” of pyruvic acid (make-ready step) d. Chemiosmosis e. Glycolysis and the Krebs cycle 7. In chemiosmosis small amounts of energy are lost by __________. That energy is used to pump __________ across a membrane. a. ATP, NADH b. NADH, glucose c . Electrons, protons
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d. ATP, water e. Electrons, NAD 8. To a living organism, which of the following has the greatest amount of energy per molecule? a. ATP b. ADP c. NADH d. CO2 e . Glucose 9. What is ATP synthase, and what function does it serve? a. It is an enzyme that catalyses oxidation of critic acid b. It is a protein that blocks molecules from penetrating membranes c . It is a membrane protein that catalyses formation of ATP d. It is a cytoplasmic enzyme that catalyzes secretion of ADP e. It is a cytoplasmic enzyme that catalyzes secretion of ATP 10. Which of the following differentiates substrate-level phosphorylation from chemosmotic phosphorylation?
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Test 2 with answers B - Biol. 101 Test 2 DeSaix 7 October...

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