Correctly match the following enzymes with the metabolic pathway they regulate. __ Phosphoenolpyruvate carboxykinase a. Gluconeogenesis...
Correctly match the following enzymes with the metabolic pathway they regulate.
__ Phosphoenolpyruvate carboxykinase a. Gluconeogenesis
__ Pyrubate dehydrogenase complex b. Glycolysis
__ Glycogen Synthase c. Citric Acid Cylcle (Krebs)
__ Pyruvate Carboxylase d. Glycogenolysis
__ Pyruvate Kinase e. Glycogenesis
Homework Answers
Ans-
Phosphoenolpyruvate carboxykinase- a. Gluconeogenesis
Pyrubate dehydrogenase complex - c. Citric Acid Cylcle (Krebs)
Glycogen Synthase- e. Glycogenesis
Pyruvate Carboxylase- d. Glycogenolysis
Pyruvate Kinase - b. Glycolysis
Explanation:
- Phosphoenolpyruvate carboxykinase is an enzyme of gluconeogenesis pathway that converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
- Pyruvate dehydrogenase complex converts pyruvate into acetyl-CoA, and this complex involves to link the glycolysis pathway to the citric acid cycle.
- Glycogen Synthase or UDP glucose –glycogen glucosyltransferase enzyme converts glucose into glycogen during glycogenesis.
- Pyruvate carboxylase enzyme converts pyruvate to oxaloacetate during gluconeogenesis
- Pyruvate kinase is responsible to transfer of a phosphate group from phosphoenolpyruvate (PEP) to adenosine diphosphate (ADP) during glycolysis.
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Correctly match the following enzymes with the metabolic pathway
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9. Which of the listed enzymes of the TCA cycle is regulated by phosphorylation/dephosphorylation cycle ? :a. isocitrate dehydrogenase b. succinate dehydrogenase c. malate dehydrogenase d. α-ketoglutarate dehydrogenase complex\}c. citrate synthase10. Name the enzyme catalyzing the following reaction:a. PEP carboxykinaseb. pyruvate kinasec. malic enzymed. pyruvate carboxylase11. Name the enzyme that catalyzes the reaction:glyoxylate +CH3CO-SCoA → malate + HSCoAa. malate synthaseb. succinate thiokinasec. aconitased. isocitrate
Describe “hub” molecules acetyl CoA and pyruvate that serve
different pathways. Explain metabolic regulation favoring metabolic
pathway choices leading to and from hub molecules. Describe how
C.A.C. serves as a “hub “pathway. Use picture as a reference.
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Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable expresses phosphofructokinase y glycerol stimulates the rate of 1. muscle 2. liver cell 3. both 4. neither glucose formation reciprocally regulates glycolysis and gluconeogenesis regulates the rate of expresses pyruvate carboxylase y cannot regulate the rate of expresses fructose 1.6 bisphosphatase Match the description with the process to which it applies transports glucose into mitochondria AMP regulates rate stimulated by high cellular glucose concentration...
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