Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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In the skeletal muscle, in anaerobic conditions, glyceraldehyde 3-phosphate is converted into pyruvate during the payoff phase of glycolysis; and this pyruvate is reduced into lactate during lactic fermentation.
Part 1-Write the 11 balanced biochemical equations corresponding to all the reaction steps leading to the conversion of glyceraldehyde-3-phosphate into lactate through glycolysis followed by lactic fermentation.
Part 2-Write the net equation of the whole transformation process (i.e. with glyceraldehyde-3-phosphate as the starting substrate; and lactate as the end product).
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- For the following enzymes (3-6) predict how the conditions will most likely affect the enzymes activity with one of the following and provide a 1 sentence explanation: a. increase activity b. decrease activity c. not likely to alter activity 3) alpha-ketoglutarate dehydrogenase complex binding to AMP when [AMP] is high. 4) phosphohexose isomerase binding NADH when [NADH] is high 5) phosphofructose-1 binding NAD+ when [NAD+] is high 6) pyruvate dehydrogenase complex binding to ATP when [ATP] is higharrow_forwardWe have described an ATP synthase complex with an Fo complex of 9 c-subunits. Consider if the F0 complex had 12 c- subunits instead of only 9 (assume a eukaryote). What would be the P/O ratio (the ATP produced in the cytosol per atom of O reduced (or a pair of e- if you want to think of it that way) obtained from using B-hydroxy-fatty-acyl-CoA Dehydrogenase? (report to 1 decimal place) ATParrow_forwardDraw OUT THE arrow pushing reaction mechanism for the following steps of glycolysis: SHOW/IDENTIFY the arrow pushing mechanism in at least 2 steps. CH,OPO CH,OH hexokinase 2+ H H H H H H ОН + ATP OH H ADP + H+ H ОН + НО HO OH H ОН H ОН Glucose-6-phosphate (G6P) Glucosearrow_forward
- Otto Warburg made an interesting observation in the 1930s about cancer cells using the fermentation pathway to catabolize pyruvate even when the oxygen supply seemed sufficient for oxidative phosphorylation. One modern explanation for this “Warburg Effect” is that it protects the cancer cells from damage from free radicals. Provide a biochemical rationale for this explanation.arrow_forwardLactic acid is a biproduct formed at the end of anaerobic respiration. This molecule is dangerous to cells of the body if it builds up too much. Despite this, the formation of lactic acid is very important. Explain why the process of anaerobic respiration is so important (providing reference to glycolysis, the role of coenzymes, and ATP formation).arrow_forward
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