For every molecule of glucose produced, gluconeogenesis consumes: O2 ATP and 2 NADH ☐ 4 ATP and 1 NADH ☐ 6 ATP and 2 NADH 4 ATP and O NADH
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- Which of the following molecules controls the metabolic flow through both glycolysis and gluconeogenesis? fructose-2,6-bisphosphate O pyruvate O 2,3-bisphosphoglycerate O Glucose-6-phosphate O lactic acid O citrate Which of the following enzymes plays a role in controlling the the half-life of CGMP? O CGMP phosphodiesterase O CGMP phosphatase O CGMP half-life controlling enzyme O CGMP kinase O CGMP phosphorylaseThe net yield of one molecule of glucose completing glycolysis and the TCA cycle is .. O 2 ATP + 2 NADH + 2 pyruvate O 2 GTP + 8 NADH + 2 FADH2 + 6 CO2 2 ATP + 2 GTP + 10 NADH + 2 FADH2 + 6 CO2 O 33 ATP + 6 CO2During glycolysis, the major energy generating step involves: pyruvate kinase phosphoglycerate kinase Phosphofructokinase glyceraldehyde-3 -dehydrogenase
- Lactate dehydrogenase (LDH) plays an essential role in an exercising muscle, especially when the level of excursion surpasses the ability of circulatory systems ability to supply adequate oxygen. What is the main reason LDH is so important to the muscle under these conditions? It produces one mole of ATP via substrate level phosphorylation. It resupplies NAD+ to glyceraldehyde 3-phosphate dehydrogenase. It decreases pH thus decreasing the dissociation rate of oxygen from hemoglobin It produces NADH for energy while converting pyruvate into lactate. It removes excess lactic acid from the muscle to create pyruvate. NextWhich of the following cellular concentrations would be likely to increase the rate of glycolysis? Low AMP levels High glucagon levels ✓Low fructose-2,6-bisphosphate levels High AMP levels High phosphoenolpyruvate levels Low ATP levelsWhich of the following is(are) consumed in the process of converting glycerol to dihydroxyacetone phosphate? O both a and b O neither a nor b O NAD* O ATP Ne « Previous
- How many ATP or NADH molecules are produced or required in each of the following steps in glycolysis? Match the words in the left column to the appropriate blanks in the sentences on the right. zero one two produced required In the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, NADH molecules are In the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate, NADH molecules are In the conversion of phosphoenolpyruvate to pyruvate molecules are ATP and Reset ATP and ATP and Help NADHOf 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?The complete aerobic catabolism of one molecule of glycerol from the break-down of fats would result in the production of NADH ATP equivalents via substrate phosphorylation.
- Glucose is converted to pyruvate in glycolysis, yielding a netsynthesis of 2 ATP. In certain cells pyruvate can be reconverted to glucose during gluconeogenesis. How many ATPsare required to convert pyruvate back to glucose?At normal to low blood glucose concentrations (1.e., roughly 110 mg/dl or less), the enzyme that is responsible for sequestering or trapping glucose within cells is which of the following enzymes? O hexokinase O glycogen synthase O glucose-6-phosphatase O glucokinaseWhich of the following is the correct summary of phase II of glycolysis for each molecule of glucose? Glucose + ATP ⟶ Glyceraldehy-3-phosphate + ADP Glucose + 2 ATP ⟶ 2(Glyceraldehy-3-phosphate) + 2 ADP Glyceraldehyde-3-phosphate + NAD+ + ADP + Pi ⟶ 3-phosphoglycerate + NADH + H+ + ATP 2(3-phosphoglycerate) + 2ADP ⟶ 2 pyruvate + 2ATP 2(Glyceraldehyde-3-phosphate) + 2NAD+ + 2ADP + 2Pi ⟶ 2(3-phosphoglycerate) + 2NADH + 2H+ + 2ATP