BCHM 2020 Study Guide - Midterm Guide: Antiporter, Decarboxylation, Cori Cycle

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11 Dec 2015

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What is the key activator of glycolysis in liver: atp, glucose 6-phosphate, ca, acetyl coa, fructose 2. 6 bisphosphate. The steps of glycolysis between glyceraldehydes 3-phosphate and 3- phosphoglycerate involve all of the following except: atp synthesis, use of pi, oxidation of nadh to nad, formation of 1,3-bisphosphoglycerate, catalysis by phosphoglycerate kinase. All of the following use coenzyme q as either substrate or product except: complex i, complex ii, complex ii, complex iii, complex iv regulate heat generation by controlling the rate of electron transport. Mitochondria in brown fat of human infants and hibernating animals. The equation for the reduction of cytochrome a by cytochrome c is: Cyt a (+2) + cyt c (+3) where: cyt a (+3) + e- What is the go" value for the reduction of cytochrome a by cytochrome c? (faraday"s constant f is 96. 49 kj/v mol: +2. 41 kj/mol, -2. 41 kj/mol, +4. 82 kj/mol, -4. 82 kj/mol, 48. 2 kj/mol, a 14-carbon fatty acid undergoes complete beta-oxidation.

Related Questions

5. Almost all of the oxygen (O2) one consumes in breathing is converted to: a. acetyl-CoA. b. carbon dioxide (CO2). c. carbon monoxide and then to carbon dioxide. d. none of the above. e. water.

6. A new compound isolated from mitochondria is claimed to represent a previously unrecognized carrier in the electron transfer chain. It is given the name coenzyme Z. Which line of evidence do you feel is the least conclusive in assigning this compound a position in the electron transfer chain? a. Alternate oxidation and reduction of the mitochondrion-bound coenzyme Z can be readily demonstrated. b. Removal of coenzyme Z from the mitochondria results in a decreased rate of oxygen consumption. c. The rate of oxidation and reduction of mitochondrion-bound coenzyme is of the same order of magnitude as the overall rate of electron transfer in mitochondria as measured by oxygen consumption. d. The reduction potential of Z is between that of two compounds known to participate in the electron transport chain e. When added to a mitochondrial suspension, coenzyme Z is taken up very rapidly and specifically by the mitochondria.

7. Which of the following is not true of the citric acid cycle? a. All enzymes of the cycle are located in the cytoplasm, except succinate dehydrogenase, which is bound to the inner mitochondrial membrane. b. In the presence of malonate, one would expect succinate to accumulate. c. Oxaloacetate is used as a substrate but is not consumed in the cycle. d. Succinate dehydrogenase channels electrons directly into the electron transfer chain. e. The condensing enzyme is subject to allosteric regulation by ATP and NADH.

8. Conversion of 1 mol of acetyl-CoA to 2 mol of CO2 and CoA via the citric acid cycle results in the net production of: a. 1 mol of citrate. b. 1 mol of FADH2. c. 1 mol of NADH. d. 1 mol of oxaloacetate. e. 7 mol of ATP.

The citric acid is a stage of catabolism that oxidizes acetate into carbon dioxide and generates energy. There are eight enzymes involved in the citric acid cycle.

Which enzymes produce NADH as a product? Select all that apply

a. alpha-ketoglutarate dehydrogenase

b. succinate dehydrogenase

c. malate dehydrogenase

d. isocitrate dehydrogenase

Which enzymes produce carbon dioxide as a product? Select all that apply.

a. malate dehydrogenase

b. isocitrate dehydrogenase

c. succinate dehydrogenase

d. alpha-ketoglutarate dehydrogenase

Which enzymes produce coenzyme A as a product? Select all that apply.

a. fumarase

b. citrate synthase

c. succinyl-CoA synthesase

d. citraste synthase

Which enzymes have an alpha-keto acid substrate? Select all that apply.

a. fumarase

b. alpha-ketoglutarate dehydrogenase

c. citrate synthase

d. malate dehydrogenase

Which enzyme catalyzes a hydration reaction?

a. aconitase

b. fumarase

c. citrate synthase

force times distance

Question 48

Soccer (assuming field player) is a sport which is 90% aerobic.

True

False

Question 50

Glucose is necessary for fatty acid oxidation because...

		its derivative, pyruvate, is condensated with carbonic acid to form oxaloacetate, which in turn is a necessary carbon compound in the citric acid cycle
		it is needed to convert fatty acids to fatty acyl-CoA which in turn is oxidized to acetyl CoA
		glucose is decarboxylated into cytochrome oxidase which is a necessary intermediate in the citric acid cycle
		its derivative, acetyl CoA, is condensated with carbonic acid to form lactase, which in turn is a necessary carbon compound in the citric acid cycle

Question 51

In aerobic ATP production, the role of oxygen is to...

		to keep the electron transport chain operational
		to accept electrons from the 3rd cytochrome and thereby oxidizing it so it can accept new electrons
		act as a oxidizing agent by accepting electrons from the electron transport chain and combining with hydrogen ions (protons)
		all of the above

Question 52

The primary purpose of the citric acid cycle is...

aerobic glycolysis

gluconeogenesis using lactate

the decarboxylation of carbon compounds to produce NADH.

the shuttling of hydrogen ions through the inner mitochondrial membrane

Question 55

Which of the following is the best predictor of marathon running performance?

	A.	Maximal rate of pyruvate oxidation
	B.	Maximal rate of lactate formation
	C.	Amount of adipose tissue triglycerides
	D.	Pre-race blood glucose concentration

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BCHM 2020 Study Guide - Midterm Guide: Antiporter, Decarboxylation, Cori Cycle

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