Several of the enzymes of glycolysis fall into classes that we will see often in metabolism. What reaction types are catalyzed by each of the following: (a) Kinases (b) Isomerases (c) Aldolases (d) Dehydrogenases
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Several of the enzymes of glycolysis fall into classes that we will see often in
(a) Kinases
(b) Isomerases
(c) Aldolases
(d) Dehydrogenases
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- Both prokaryotic and eukaryotic organisms carry out some form of glycolysis. How does ha fact support or not support the assertion that glycolysis is one of the oldest metabolic pathways?Several of the enzymes of glycolysis fall into classes that we will see often in metabolism. What reaction types are catalyzed by each of the following: Kinases Isomerases Aldolases DehydrogenasesGlucose binds to glycogen phosphorylase and competitively inhibits the enzyme. What is the physiological advantage of this?
- How many steps in gluconeogenesis are not the exact reversal of the steps in glycolysis? What kind of conversion of substrate to product does each involve? What is the common theme in each of these reactions?How does the yield of ATP from complete oxidation of onemolecule of glucose in muscle and brain differ from that in liver,heart, and kidney? What is the underlying reason for this difference?Which reactions of glycolysis can be reversed? Which are irreversible? What is the significance of the metabolically irreversible reactions?
- a) What is the reason for the non-oxidative phase of the pentose phosphate pathway?b) Which compound is converted into which compound in the step where sequential dehydration and hydration reactions occur in the citric acid cycle?c) Why is ammonia released in some tissues carried by binding to other molecules in the blood? Where is it transmitted in the body for its destruction? What molecule is it transferred onto there? So what molecule does it make?Of the 36 molecules of ATP produced by the complete metabolism of glucose, how many are produced directly in glycolysis alone, that is, before the common pathway?Where in the biochemical pathway of cellular respiration (glycolysis, intermediate stage, or citric acid cycle) does each of the following enter: (a) glycerol, (b) fatty acids, and (c) deaminated amino acids?
- What is the significance of the ΔG°’ value of each step of Glycolysis? Why do some values classify reactions as irreversible and others as easily reversible?In considering the carbohydrate maltose... a. How many molecules of acetyl CoA are formed from its complete catabolism? b. How many rounds of Citric acid Cycle must occur to complete catabolism? c. How many rounds of electron transport chain and oxidative phosphorylation?Fructose can enter glycolysis by hexokinase. If fructose is used for glycolysis what enzyme can be skipped in glycolysis? And why can this enzyme be skipped if fructose is used for glycolysis?