Two glucose molecules undergo cellular respiration. Match the end-products of the citric acid cycle with their correct numbers that would result from the breakdown of these two glucose molecules by cellular respiration. АТР ( Choose ) 4 10 NADH V 12 6 FADH2 4 CO2 12
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- ATP- 8
- NADH- 20
- CO2- 12
- FADH2- 4
20 is the wrong answer
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- Explain why step 1 of the citric acid cycle is inhibited by succinyl-CoA. Be complete for full credit.Help filling in the blanks: The malate aspartate shuttle plays many roles in carbohydrate and amino acid metabolism. Malate can be transferred into the cytosol and interconverted in one enzymatic step to produce [oxaloacetate/glucose/PEP/pyruvate] for use in the pathway of [glycolysis/gluconeogenesis]. A product of the urea cycle, derived from aspartate, can also be converted to malate in one enzymatic step and shuttled into the mitochondria so that the urea cycle product can be used in [fatty acid synthesis/the citric acid cycle/β-oxidation]. The amino group from aspartate can be transferred to [oxalacetate/malate/fumarate/pyruvate/a- ketoglutarate] to form glutamate, which is then transported into the mitochondria. In fact many amino acids are transaminated in this way to form glutamate in the cytosol. In this way, incoming amino acids from the bloodstream can be shuttled into the liver mitochondria as glutamate for conversion by glutamate dehydrogenase to [glutamate/a-ketoglutarate…The citric acid cycle itself, which is composed of enzymatically catalyzed steps, can be thought of essentially as a supramolecular enzyme. Explain.
- 47. No exchange. Mice that completely lack ATP-ADP translocase (ANT- /ANT - ) can be made by using the knockout technique. Remarkably, these mice are viable but have the following pathological conditions: (1) high serum levels of lactate, alanine, and succinate; (2) little electron transport; and (3) a six- to eightfold increase in the level of mitochondrial H2O2 compared with that in normal mice. Provide a possible biochemical explanation for each of these conditions.Please select appropriate word in each bracket Glycogen provides short term energy storage primarily in liver and muscle. Defects in the enzymes that are required for either glycogen synthesis or breakdown therefore affect levels of [ Select ] ["glucose", "glycogen"] in the bloodstream and the amount of glycogen in the liver. This is exemplified by defects in [ Select ] ["glucose-6-phosphatase", "glycogen synthase"] , which is a deficit in breakdown and delivery, whereas mutations compromising [ Select ] ["glycogen synthase", "glycogen debranching enzyme"] result in a defect in synthesis, but defects in either enzyme produce [ Select ] ["hypoglycemia", "hypothermia"].Lactate dehydrogenase is a tetramer of MW 134000 g/mole composed of subunits which are equal in size. It is found in the cytoplasm of eukaryotic and prokaryotic cells. Describe the secondary, tertiary and quaternary structures of lactate dehydrogenase.
- Phosphoribosyltransferase (PRT) catalyzes the attachment of a salvaged purine nitrogenous base on the activated form of ribose-5-phosphate called 5-phosphoribosyl- α α-pyrophosphate ( α α-PRPP). True Or FalsePalmitoleic acid, 16:1Δ⁹ hexadecaenoic acid, (16 carbon FA with one double bond )is an important fatty acid component of TAGs and cell membranes. Briefly explain the process of beta oxidation of this fatty acid and the number (only) of FADH, NADH and acetyl CoA outcome. What is the total ATP (only number) generated from this fatty acid after beta oxidation.Can you please pick the right answer in each parentheses? The pentose phosphate pathway provides a number of critical functions including ["production of ribose-5-phosphate", "production of NADH"] that is vital for ["synthesis of nucleotides and coenzymes", "oxidative phosphorylation"] . This pathway is divided into oxidative and non-oxidative steps. The latter steps ["are involved in the conversion of various sugar phopshates, so called ["carbon shuffle reactions"", "are directly involved in NADPH production"] . If ["NADP+", "NAD+"] levels are high, flux through the pentose phosphate pathway is promoted by allosteric regulation of glucose-6-phosphate dehydrogenase. If reducing equivalents derived form the pentose phosphate pathway are high, glucose-6-phosphate is directed toward ["a phosphatase and then export from the cell", "glycolysis"] .
- a-Ketoglutarate plays a central role in the biosynthesis of several amino acids. Arrange the reactions to outline the net synthesis of a-ketoglutarate from pyruvate. Your proposed sequence must not include reactions that result in the net consumption of other citric acid cycle intermediates. Pyruvate + ATP + CO, + H,0 → oxaloacetate + ADP + P; + H+ a-Ketoglutarate + CoA + NAD+ → succinyl-CoA + CO,+NADH + H+ Pyruvate + CoA + NAD+ acetyl-CoA + CO,+NADH + H+ Oxaloacetate + acetyl-CoA → citrate + CoA Oxaloacetate + NADH + H+ malate + NAD+ Citrate → isocitrate Isocitrate + NAD+ a-ketoglutarate + CO,+NADH + H* 2.What is the citric acid cycle? Provide a schematic diagram of the citric acid cycle with chemical structures of each compound in the cycle. Indicate the cofactors and products at each step as well as the name of each of the enzymes involved.The clinical signs of two types of galactosemia—galactokinase deficiency or UDPglucose: galactose 1-phosphate uridylyltransferase deficiency—are markedly different. Although both forms cause gastrointestinal pain after drinking milk, transferase deficiency also causes liver, kidney, spleen, and brain malfunction, as well as mortality. With each kind of enzyme shortage, what products accumulate in the blood and tissues? Estimate the relative toxicity of these goods based on the information provided above.