Homework Answers
1. GTP, NADH, FADH2
The energy released during Kreb's cycle (TCA cycle) is stored in
form of reducing power and GTP.
NADH, FADH2 are the reducing powers formed during Kreb cycle along
with GTP.
2. 4 CO2, 6 NADH
Two molecules of acetyl CoA enter the TCA cycle and form 4 CO2, 6 NADH, 2 FADH2 and 2 GTP.
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When acetyl-CoA is fed into the TCA cycle, it eventually forms carbon dioxide. The energy released...
The TCA cycle generates all of the following from each acetyl-CoA molecule oxidized except three NADH...
The TCA cycle generates all of the following from each acetyl-CoA molecule oxidized except three NADH molecules. two ATP or GTP molecules. two CO2 molecules. one FADH2 molecule.
As pyruvate is completely broken down in the TCA (Krebs) cycle, some of its energy is...
As pyruvate is completely broken down in the TCA (Krebs) cycle, some of its energy is A) conserved in the water molecules resulting from reduction of oxygen. B) conserved in the carbon dioxide molecules released by the processes. C) conserved in FAD and NAD+. D) conserved in NADH + H+ and FADH2. E) found in the oxygen used in the electron transport chain.
Question 5 1 pts What is the main purpose of the Kreb's cycle (also known as...
Question 5 1 pts What is the main purpose of the Kreb's cycle (also known as the TCA or Citric Acid cycle) To produce ATP from the energy stored in acetyl-CoA To oxidize pyruvate and produce NAD and FADH2 To recycle NADH for use back in glycolysis To produce carbon dioxide by the reduction of pyruvate To produce NADH/FADH2 from the oxidation of acetyl-CoA
Draw the complete TCA cycle (Krebs or Citric acid cycle). Show the entry of acetyl- COA...
Draw the complete TCA cycle (Krebs or Citric acid cycle). Show the entry of acetyl- COA and the eight intermediates. Draw the chemical structures of each compound. Show the control point(s) in the pathway. Show where all CO2 is released and label the reactions where oxidation of carbon occurs.
b. Demonstrate the total energy yield in terms of ATP equivalents for the complete catabom acetyl...
b. Demonstrate the total energy yield in terms of ATP equivalents for the complete catabom acetyl CoA molecule. Enzyme name ATP or GTP from NADH FADH2 ATP substrate-level equivalents phosphorylation TOTAL [2 marks] c. Explain why the TCA cycle is important for both anabolism and catabolism (amphibolic reactions). [2 marks]
6. In mammals, which of the following does not occur during the citric acid cycle? A)...
6. In mammals, which of the following does not occur during the citric acid cycle? A) formation of a-ketoglutarate. D) metabolism of acetate to carbon dioxide and water. B) net synthesis of oxaloacetate from acetyl-CoA. E) oxidation of acetyl-CoA. C) generation of NADH and FADHz. 7. Which of the following reaction generates GTP(ATP) in the CAC? A) Isocitrate to a-ketoglutarate. D) Fumarate to Malate. B) Malate to Oxaloacetate. E) Succinyl-CoA to Succinate. C) a-ketoglutarate to Succinyl-CoA.
The product of the complete oxidation of carbon in the TCA cycle is: a. oxaloacetate b....
The product of the complete oxidation of carbon in the TCA cycle is: a. oxaloacetate b. acetyl coa c. citrate d. CO2 e. None of the above In addition to glucose which of the following sugars can enter glycosis a. celobiose b. ribose c. galactose d. b & c e. all of the above In anaerobic metabolism, what is the fate of pyruvate produced by glycolysis a. converted to ethanol b. converted to lactate c. converted to acetyl-COA d. a...
High energy compounds that undergo oxidation to release energy are 1.) ATP and Acetyl-CoA 2.) Ac-CoA...
High energy compounds that undergo oxidation to release energy are 1.) ATP and Acetyl-CoA 2.) Ac-CoA and FADH2 3.) ATP and NADH 4.) NADH and FADH2 The portion of transmembrane proteins that spans bilayer membrane in rich in 1.) non-polar amino acids 2.) polar, uncharged amino acids 3.) amino acids which are charged at pH 7 4.) hydrophilic amino acids Substrate level phosphorylation occurs during glycolysis 1.) step 6, during the formation of 1,3 bisphosphoglycerate from GAP 2.) step 1,...
Question 12 1 pts From your General Cell Biology knowledge, what biological process occurs in/on cristae?...
Question 12 1 pts From your General Cell Biology knowledge, what biological process occurs in/on cristae? Glycolysis Calvin Cycle Cellular respiration TCA cycle DQuestion 13 1 pts From your General Cell Biology knowledge, what is cellular respiration? O The energy stored in the proton electrochemical gradient is harnessed by a proton channel that uses the energy released to turn the ATP synthase to power the synthesis of ATP. Glucose is metabolized to pyruvate with the formation of reduced intermediates, NADH,...
1. Which one of the following shows the correct sequence of energy transitions during chemiosmosis? A....
1. Which one of the following shows the correct sequence of energy transitions during chemiosmosis? A. NADH → electron acceptors → proton gradient → ATP synthase → ATP B. NADH → NAD+ → FADH2 → electron acceptors → ATP C. carbohydrates → acetyl CoA → CO2 → proton gradient → ATP D. NAD+ → NADH → protons → ADP → ATP E. glucose → pyruvate → acetyl CoA → NADH → ATP 2. Facultative anaerobes: A. prefer carbon dioxide. B....
Question 5 1 pts What is the main purpose of the Kreb's cycle (also known as the TCA or Citric Acid cycle) To produce ATP from the energy stored in acetyl-CoA To oxidize pyruvate and produce NAD and FADH2 To recycle NADH for use back in glycolysis To produce carbon dioxide by the reduction of pyruvate To produce NADH/FADH2 from the oxidation of acetyl-CoA
Draw the complete TCA cycle (Krebs or Citric acid cycle). Show the entry of acetyl- COA and the eight intermediates. Draw the chemical structures of each compound. Show the control point(s) in the pathway. Show where all CO2 is released and label the reactions where oxidation of carbon occurs.
b. Demonstrate the total energy yield in terms of ATP equivalents for the complete catabom acetyl CoA molecule. Enzyme name ATP or GTP from NADH FADH2 ATP substrate-level equivalents phosphorylation TOTAL [2 marks] c. Explain why the TCA cycle is important for both anabolism and catabolism (amphibolic reactions). [2 marks]
6. In mammals, which of the following does not occur during the citric acid cycle? A) formation of a-ketoglutarate. D) metabolism of acetate to carbon dioxide and water. B) net synthesis of oxaloacetate from acetyl-CoA. E) oxidation of acetyl-CoA. C) generation of NADH and FADHz. 7. Which of the following reaction generates GTP(ATP) in the CAC? A) Isocitrate to a-ketoglutarate. D) Fumarate to Malate. B) Malate to Oxaloacetate. E) Succinyl-CoA to Succinate. C) a-ketoglutarate to Succinyl-CoA.
Question 12 1 pts From your General Cell Biology knowledge, what biological process occurs in/on cristae? Glycolysis Calvin Cycle Cellular respiration TCA cycle DQuestion 13 1 pts From your General Cell Biology knowledge, what is cellular respiration? O The energy stored in the proton electrochemical gradient is harnessed by a proton channel that uses the energy released to turn the ATP synthase to power the synthesis of ATP. Glucose is metabolized to pyruvate with the formation of reduced intermediates, NADH,...
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