BIOL 1P91 - Final Exam Prep Questions Well Answered 100%

BIOL 1P91 - Final Exam Prep Questions Well Answered 100% Which of the following happens in the cytosol? a) Glycolysis b) breakdown of pyruvate into an acetyl group c) citric acid cyle d)oxidative phosphorylation e) all of the above - ANSWER Answer: Glycolysis The net products of glycolysis are: a) 6 CO2 + 4 ATP, 2 NADH b) 2 pyruvate, 2 atp, 2 NADH c) 2 pyruvate, 4 ATP, 2 NADH d) 2 pyruvate, 2 GTP, and 2CO2 e) 2 CO2, 2 ATP & glucose - ANSWER Answer: b, 2 pyruvate, 2 atp, 2 NADH During glycolysis ATP is produced by: a) oxidative phosphorylation b) substrate-level phosphorylation c) redox reactions d) all of the above e) both a and b - ANSWER Answer: b, substrate level phosphorylation Which organic molecules supplies a 2-carbon group to start the citric acid cycle? a) ATP b) NADH c) acetyl coA d) oxoloacetate e) a and b - ANSWER Answer: C, acetyl CoA The ability to diagnose tumours using FDG is based on the phenomenon that most cancers exhibit higher levels of: - ANSWER Answer: glycolysis Racker and stoeckenius experiment, bacteriorhodopsin was oriented in such a way that it pumped H+ into a vesicle. Each vesicle actually contained many molecules of bacteriorhodopsin. How would the result of the experiment have been affected if 50% of the bacteriohodopsin molecules pumped H+ into the vesicle and 50% pumped H+ out of the vesicle? - ANSWER Answer: No ATP would be made in the presence of light, and no ATP would be made in the dark Certain drugs called Ionophores cause the mitochondrial membrane to be permeable to H+. How would such drugs affect oxidative phosphorylation? - ANSWER Answer: ATP synthesis would be inhibited The source of energy that directly drives the synthesis of ATP during oxidative phosphorylation is - ANSWER Answer: H+ chemical gradient When conditions in a muscle become anaerobic during strenuous exercise, why is it necessary to convert pyruvate to lactate? - ANSWER Answer: To decrease NADH and Increase NAD+ What causes the rotation of the y sub unit of ATP synthase? How does the rotation promote ATP synthase? - ANSWER Answer: Movement of H+ through the contact site between c and a sub units. This allows y sub unit to rotate. Causes conformational change. The water necessary for photosynthesis? - ANSWER Answer: Provides the electrons to replace those lost in photosystem II In PSII, P680 differs from the pigment molecules in lightharvesting complex in that - ANSWER Answer: Transfers an excited electron to the primary electron acceptor The cyclic electron flow that occurs during photosystem ! produces: - ANSWER Answer: ATP During linear electron flow, the high-energy electron from P680* - ANSWER Answer: Eventually moves to NADP+ During the first phase of the Calvin cycle, carbon dioxide is incorporated into ribulose bisphosphate (RuBP) by - ANSWER Answer: rubisco The NADPH produced during the light reactions is necessary for? - ANSWER Answer: The reduction phase, which produces carbohydrates in the calvin cycle The majority of G3P produced during the reduction and carbohydrate production phase is used in making: - ANSWER Answer: RuB