Tagged: ATP

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Lactate to glucose conversion

Lactate is oxidized to pyruvate in a reaction catalyzed by Lactate dehydrogenase. The patients with genetic deficiency of lactate dehydrogenase present with muscle cramping and myoglobinuria after intense exercise. The sources of lactate include muscle and red blood cells. Lactate is a waste product in such cells; it is transported to liver and can be converted to glucose through pathway of gluconeogenesis. The energy requirements for conversion of lactate to glucose are: A. 2 ATP B. 4 ATP C. 6 ATP D. 8 ATP E. 38 ATP. The correct answer is C- 6 ATP. Lactate produced by active skeletal muscle...

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ATP- The energy currency within the cell

Q.- Adenosine triphosphate (ATP) is the energy currency within the cell. Which of the following best describes the type of compound ATP is? A. Phospholipid B. Amino acid C. Nucleotide D. Triacylglycerol E. Oligosaccharide.  Details The correct answer is -C- Nucleotide. The nucleotide coenzyme adenosine triphosphate (ATP) is the most important form of chemical energy in all cells.  All fuel sources of nature, all foodstuffs of living things, produce ATP, which in turn powers virtually every activity of the cell and organism. Cleavage of ATP is strongly exergonic. The energy provided is used to drive endergonic processes (such as biosynthesis and...

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Fructose 2, 6 Bis phosphate and regulation of glycolysis

Case details A patient presents with dizziness, fatigue and tremors. A finger stick test indicates blood glucose of 36mmol/L. Of the allosteric activators of glycolysis in the liver, which of the following is the most important in maintaining a normal blood glucose level? A. Citrate B. ATP C. Fructose 2, 6 bisphosphate D. Glucose-6-Phosphate E. Acetyl Co A The correct answer is- C- Fructose 2,6 bisphosphate Generally, enzymes that catalyze essentially irreversible steps in metabolic pathways are potential sites for regulatory control.  Although most of the reactions of glycolysis are reversible, three are markedly exergonic and must therefore be considered...

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