answer 98, 99, 100, 101 Given the following series of metabolic reactions: acety
ID: 527910 • Letter: A
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answer 98, 99, 100, 101
Given the following series of metabolic reactions: acetyl CoA & oxaloacetic acid rightarrow citric acid rightarrow isocitric acid rightarrow oxalosuccinic acid Enzyme 1 is classified as what type of enzyme? A) ligases B) lyases C) transferases D) isomerases E) oxidoreductases Enzyme 1 has regulatory sites for NAD, ATP and NADH. Which would deactivate the enzyme? A) NAD B) ATP C) NADH D) ATP and NAD E) ATP and NADH What type of enzyme is E_3? A) ligases B) lyases C) transferases D) isomerases E) oxidoreductases What is the high energy bond in acetyl-CoA A) a regular ester B) a thio ester C) a phosphate ester D) a thioalcohol Which can produces the most ATP per glucose molecule? A) glucose metabolism in a muscle cell under anaerobic conditions B) glucose metabolism in a red blood cell under any conditions C) glucose metabolism in the muscle under aerobic conditions D) fermentation In aerobic exercise, the pH of the muscles will A) increase B) decrease C) remain the same D) depends on the temp Why are there so many steps in the metabolic pathways? A) to prevent the rapid release of energy B) to save some of the energy as ATP C) to have control spots to regulate metabolism D all are true E) A and B What is the purpose of the Cori cycle? A) move pyruvic acid from the muscle B) move lactic acid out of the muscle to the liver C) have the liver provide the muscle with "new glucose" D) all are true E) B & C In the conversion of pyruvic acid to acetyl CoA, what enzymes are needed? A) dehydrogenase B) decarboxylase C) synthetase D) all are true E) A and B In times of starvation, which can be converted into glucose? A) all amino acids B) glycerol C) ketone bodies D) all are true E) A and B If there is no oxygen present, which processes can still occur? A) Krebs cycle B) electron transport C) glycolysis D) all are true E) no answer is correct Which is true of ketone bodies? A) Since 2 out of 3 ketone bodies are acids, they can lead to acidosis B) Synthesized by all cells C) synthesized by the liver D) all are true E) A & CExplanation / Answer
98) The enzyme needed for the conversion of pyruvic acid to acetyl-CoA is pyruvate dehydrogenase,
it is a) dehydrogenase enzyme
99) During starvation glucose is produced in the body by a process called glucogenesis. Glusose is produced from amino acids and glycerols during glucogenesis.
So, E) A and B is the answer
100) Krebs cycle is considered as an aerobic process, so it can not occur in the complete absence of oxygen. For electron transport molecular oxygen is the electron carrier.
But glycolysis can occur in the complete absence of oxygen.
C) is the correct option
101) Ketone bodies are synthesised in liver. Two of the ketone bodies (acetoacetate and beta hydroxy butyrate) are acidic in nature and they can lead to acidosis (an excessive acidic condition in body fluid) when an excess amout of ketone bodies are synthesised.
E) A and C is the correct option.
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