14) When a muscle contracts anaerobically, more lactic acid is formed than when it contracts aerobically because A) oxygen inhibits fermentation of pyruvate to lactate Brunder anaerobic conditions, most pyruvate is fermented to ethanol C) under aerobic conditions, most pyruvate is oxidized to CO2 by the citric acid cycle D) glycolysis does not occur to a significant extent under aerobic conditions. E) it's been paralyzed by a 3000-fold excess of Botox

If 1"co2 (radioactive carbon) were incorporated into the TCA cycle via the Pyruvate Carboxylase reaction which of the following molecules would contain radioactive carbon? Multiple answers: Multiple answers are accepted for this question Select one or more answers and submit. For keyboard navigation. SHOW MORE V a Oxaloacetate Citric acid Isocitric acid d a-Ketoglutarate e Succinyl-CoA Succinate Fumarate Malate b0

Please explain why D)[2,3,&4] is  wrong and give me the correct answer

Can you please pick the right answer in each parentheses? Gluconeogenesis is essentially  ["a bypass of glycolysis", "the reverse of glycolysis"]    , providing a way of counteracting low levels of   ["glucose", "ATP"]  .  There are 10 enzyme catalyzed steps in glycolysis and gluconeogenesis employs   ["seven of them", "none of them"]  .     ["pyruvate carboxylase", "pyruvate kinase"]    is a key enzyme in gluconeogenesis, serving to take pyruvate to   ["oxaloacetate", "phosphoenolpyruvate"].

Organisms growing anaerobically cannot perform glycolysis for long without reducing the pyruvate from glycolysis into another compound, most commonly to lactate or to ethanol plus CO2. Both of these reactions are given below in their unbalanced forms. Explain in one sentence why one of these reducing steps is needed to sustain anaerobic glycolysis.

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"]            .

Why is the TCA cycle is important for both anabolic and catabolic reactions?

Can you please pick the right answer in each parentheses (a) to (e)? Coenzymes are nonprotein compounds that are required for the activity of certain enzymes.  One critical coenzyme central to metabolism is NAD+.  In fact it is one of 5 coenzymes required by (a)< "pyruvate dehyrogenase" vs "citrate synthase" > , the critical enzyme for producing Acetyl-CoA.  NAD+ is synthesized from  (b)< "niacin (vitamin B3)" vs "acetate" > as was discovered to be critical for health by two American scientists, (c)<"Joseph Goldberger and Conrad Elvehjem" vs "Linus Pauling and Eric Lander"> , in the early 20th century.  Dietary lack of this critical molecule produces pellagra, characterized by the following symptoms: (d)<"skin inflammation, dementia, diarrhea" vs "chorea-like movement">.  People with these problems were found in parts of the U.S. where diets lacked vegetables and consisted principally of corn.  Interestingly, soaking the corn  in (e)<"salt water" vs…

State the steps of ketone body formation, starting with two acetyl CoA.  Please make sure to state all the enzymes and co-factors for each reaction.

I don't understand it. Can u help me? Can u help me to explain this to me, please