If 14CO2 (radioactive carbon) were incorporated into the TCA cycle via the Pyruvate Carboxylase reaction which of the following molecules would contain radioactive carbon? a. Oxaloacetate  b. Citric Acid c. Isocitrate d. Alpha-ketoglutarate e. Succinyl-CoA f .Succinate g. Fumarate  h. Malate

1. Which of the following TCA cycle intermediates is also a metabolite in gluconeogenesis? a. Oxaloacetate b. Pyruvate c. Citrate d. Succinate e. Succinyl CoA

Which of the following enzymes do not catalyze a reaction in the citrate cycle that produces CO2 as a product? Choose one or more: OA. isocitrate dehydrogenase OB. fumarase L C. succinate dehydrogenase O D. succinyl-CoA synthetase

Glyceraldehyde 3-phosphate dehydrogenase is used to do which of the following steps of glycolysis Select one: a. 1,3 Bisphosphoglycerate is converted to 3-phosphoglycerate b. Phosphoenolpyruvate is converted to pyruvate c. 2-phosphoglycerate is converted to Phosphoenolpyruvate d. Glyceraldehyde-3-phosphate is converted to 1,3 Bisphosphoglycerate e. Fructose-6-phosphate is converted to Fructose-1,6,bisphosphate f. Dihydroxyacetone (Glycerone Phosphate) is converted to Glyceraldehyde-3-phosphate g. Fructose-1,6 Bisphosphate is converted to Dihydroxyacetone and Glyceraldehyde-3-phosphate h. Glucose-6-phosphate is converted to Fructose-6-phosphate i. 3-phosphoglycerate is converted 2-phosphoglycerate j. Glucose is converted to Glucose-6-phosphate

Which of the following enzymes possesses a catalytic mechanism extremely similar to that of the Pyruvate Dehydrogenase Complex?   A. the isocitrate dehydrogenase B. the succinate dehydrogenase C. the alpha-ketoglutarate dehydrogenase D. the malate dehydrogenase

All of the following classes of enzymes catalyze the Fatty acid synthesis except  a. synthetase b. Synthase c. Carboxylase d. Dehydrgen

In TCA cycle, FADH2 is formed in reaction(s) catalyzed by O a. Succinyl-CoA synthetase O b. Succinate dehydrogenase O c. Aconitase O d. Isocitrate dehydrogenase Oe. Citrate synthase

In Yeast, pyruvate can be directly converted into: A. acetyl-CoA and ethanol B. acetyl-CoA only C. lactate only D. ethanol only

Are the following up or down regulation of phosphorylation? (Note: It assumes that the enzymes were involved in glycoysis) a. Phosphofructokinase-2 b. Pyruvate Kinase c. Phosphofructokinase-1 d. Pyruvate Dehydrogenase Kinase

When acetyl-CoA containing radioactively labeled carbon atoms is fed to cells, the CO, produced is not initially radioactive. However, molecules of citrate and oxaloacetate are radioactive. Only after some time has passed will radioactive CO2 be released. What is the best explanation for this observation?