Compare and contrast biochemical pathways. Describe the chemistry of the last three steps of the TCA. Describe the chemistry of the first three steps of β-oxidation. Explain how these pathways are similar and how they differ in terms of their chemistry, the involvement of coenzymes and the fate of the electrons. Describe the two connections between the urea cycle and the citric acid cycle

. Propose a chemical mechanism for the reaction catalyzed by the PLP-dependent glatamate 1-semialdehyde aminomutase.

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Select the best answer. What pathways generate reduced cofactors (NADH or FADH2) for the Electron Transport Chain to use? 1. Glycolysis 2. Gluconeogenesis 3. Pyruvate Dehydrogenase Complex Reaction 4. Citric Acid Cycle 5. Fatty Acid β-Oxidation   Question 18 options:   1, 3, 4   2, 3, 4   1, 3, 4, 5   2, 3, 4, 5   1, 2, 3, 4, 5

a. Calculate how  many carbons from an original glucose molecule will enter into the TCA cycle? (please provide your answer in number like 1, 2, 3)   b. Based on the question you answered above what happens to the carbons that do not enter the cycle (write what it converts into)?

ATP Accounting Upon digestion of starch, maltose, one of its degradation products, is further hydrolyzed into its monosaccharide components prior to intestinal absorption and entry into the glycolysis. Calculate the number of ATP molecules produced from the digestion and complete oxidation of 3 molecules of maltose considering the malate-aspartate shuttle. Answer the following items using numerical value only (e.g. 1, not "1 ATP") which will help you arrive at the final answer for this question. a. Total number of glucose molecules entering glycolysis: b. Total number of pyruvate molecules produced at the end of glycolysis: c. Total number of mitochondrial NADH produced after pyruvate is acted upon by the pyruvate dehydrogenase complex: d. Total number of CO2 released right after the pyruvate dehydrogenase complex reaction: e. Total number of acetyl CoA molecules entering the citric acid cycle: f. Total number of net cytosolic ATP molecules produced right after glycolysis: g. Total…

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G. ENZYME CLASSIFICATION. Identify the main class of enzymes used to catalyzed the following reactions: 1. Lactate dehydrogenase: NADH+H NAD HC-OH CH3 CH Pynnte Lactate 2. Methylmalonyl-CoA mutase: CH CH SCOA CH,CH, SCOA coenzyme B12 COO COO methylmalonyl-CoA succinyl-CoA 3. Enolase: 0. H–Ċ–0–P–0- C-0–P-0- + H,0 HO–CH, CH 6 Phosphoenolpyruvate 2-Phosphoglycerate 4. Chymotrypsin: -0–CH,CH3 + H2O - RCOOH + HOCH,CH3 5. Pyruvate carboxylase: coo • co, • ATP + H,0 H-C-H . ADP + P, + 2H čoo CH, Pyruvate Oxaleacetate

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