Biochem Module 7 questions and answers well illustrated.

Biochem Module 7 questions and answers well illustrated. True or False: The Δ G value for a particular reaction is -78kJ/mol. This value indicates the reaction is spontaneous. - correct True or false: A biochemical metabolic pathway is a single reaction that converts starting material into products. - correct multiple reactions Three ATP molecules are used in the energy-investing stage of glycolysis. - correct 2 molecules The citric acid cycle occurs in the presence of oxygen. - correct , cannot occur in the absence of O2 The β -oxidation pathway only degrades odd-numbered fatty acids. - correct The main pathway for the degradation of fatty acids is through β-oxidation. It was found that fatty acids with an odd number of carbon atoms are oxidized in the same way as fatty acids with an even number of carbon atoms, with the only difference being that at the last stage of the β-oxidation one propionyl-CoA molecule and one acetyl-CoA molecule are formed, not 2 acetyl-CoA molecules as in the case of β-oxidation of fatty acids with an even number of carbon atoms. In total, how many ATP or NADH are produced (or required) in the glucose to pyruvate steps in glycolysis? - 1 NADH required - 1 ATP and 2 NADH required - 2 ATP and 2 NADH produced - 2 ATP producedNone of the above - correct answers.- 2 ATP and 2 NADH produced prep phase -2 ATP payoff 4 ATP + 2 NADH Total 2 ATP net + 2 NADH In converting glucose to pyruvate, how many ATP or NADH are produced (or required) in the fructose-6-phosphate to fructose-1,6-phosphate step in glycolysis? What steps to lose or gain ATP/NADH - 1 ATP required - 1 ATP produced - 2 ATP produced - 2 ATP required - None of the above - correct answers.- 1 ATP required 1) glucose phosphate -1 ATP 3) fructose diphosphate -1 ATP 6) 1, 3 diphosphate +2 NADH 7) 3 phosphyglycerate +2 ATP 10) pyruvate +2 ATP What is the primary product of glycolysis? - Glucose - Glucose-6-phosphate - phosphoenolpyruvate - GAP and DHAP - Pyruvate - correct answers.- Pyruvate In glycolysis, when glucose enters a cell, it is immediately phosphorylated to form glucose-6- phosphate. The phosphate donor in this reaction is ATP, and the enzyme is ________. - Hexokinase - Aldolase - CoA - Phosphohexose isomerase - None of the above - correct answers.- Hexokinase In the last reaction of glycolysis, ATP is formed by the direct transfer of a phosphate group from a metabolite to ADP. This process is referred to as: - Substrate-level phosphorylation - Protein phosphorylation - Lipid phosphorylation - Isomerization - Photo-protein dephosphorylation - correct answers.Substrate-level phosphorylation Under anaerobic conditions, to which compound is pyruvate converted? - Ethanol - DHAP - Hexokinase - GAP - None of the above - correct answers.- Ethanol (yeast) Also lactate aerobic: yield additional ATP There are ___________ reactions in glycolysis. 6 8 9 10 12 - correct answers.10 The reactions of glycolysis take place in/on the ___________. - Mitochondria - Vacuoles - Ribosome - Cytosol - None of the above - correct answers.- Cytosol How is ATP used in the initial steps of glycolysis? - Lipid phosphorylation reagent - Isomerization reaction - Source for phosphorylation - Protein production - None of the above - correct answers.- Source for phosphorylation Which of the following is a cyclic pathway? CAC PDH Glycolysis Oxidative phosphorylation β -oxidation - correct answers.CAC How many ATP molecules does NADH yield after oxidative phosphorylation? 1.5 2 2.5 3 3.5 - correct answers.2.5 Besides NADH and FADH2, what energy molecule is produced directly in the citric acid cycle? A. CO2 B.ATP