To review:
Whether the following statements are true or false:
a. The reactions of beta-oxidation crop fatty acids into three-carbon pyruvate units.
b. Most amino acids are converted into products that are oxidized by beta-oxidation.
c. The final common pathway for carbohydrate, protein, and lipid catabolism is the same.
d. Fat oxidation generates more ATP than protein or carbohydrate catabolism.
e. Fat and protein catabolism takes place primarily in the cytosol.
Introduction:
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Human Anatomy & Physiology
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- Which of the following statements concerning gluconeogenesis is NOT true? a. Gluconeogenesis is to make glucose from glycogen. b. Many of the reactions of gluconeogenesis are glycolytic reactions going in reverse. c. The process of gluconeogenesis consumes ATP. d. The process of gluconeogenesis is regulated by ATP. e. Gluconeogenesis maintains the blood glucose level long after all dietary glucose has been absorbed and oxidized.arrow_forwardWhich of the following is the chemical end product of fatty-acids metabolized in the beta-oxidation pathway? Select one: a. Beta-carotine b. Free-radicals c. Lactic acid d. Acetyl-CoA e. Pyruvatearrow_forwardA major pathway for metabolism of ethanol is shown below. Humans consuming a large fraction of their calories in the form of ethanol may become hypoglycemic. This is because: Ethanol is a good solvent, and it dissolves the membranes of the mitochondria, where some of the gluconeogenic enzymes reside. b. Ethanol metabolism indirectly inhibits pyruvate kinase, by consuming NAD. d. Ethanol metabolism indirectly inhibits lactate dehydrogenase, by consuming NAD. f. The assertion in the question is incorrect, because acetyl-CoA can be used for synthesis of glucose. g. Ethanol metabolism indirectly inhibits pyruvate carboxylase, by consuming NAD. h. Ethanol metabolism indirectly inhibits phosphoenolpyruvate carboxykinase, by consuming NAD.arrow_forward
- Match the description with the correct enzyme. Descriptions: a. Uses alpha-keto carboxylic acid as a substrate b. Directly transfers cytosolic reducing equivalents into the electron transport chain c. Its activity depends on magnesium ions Options (enzymes): A. Mitochondrial glycerol 3-phosphate dehydrogenase B. Succinate dehydrogenase C. Cytosolic glycerol 3-phosphate dehydrogenase D. Cytochrome oxidase E. Rubisco F. α-ketoglutarate dehydrogenase complexarrow_forwardWhich of the following is true?a. Triglycerides have the least energy content per gram of the three majorenergy sources in the body.b. Fat catabolism generates new triglycerides for storage in adipose tissue.c. By mass, the total-body content of carbohydrates exceeds that of total triglycerides.d. Catabolism of fatty acids occurs in two-carbon steps.e. Triglycerides are the major lipids found in plasma membranesarrow_forwardWhich of the following statements concerning the enzyme regulation is CORRECT? Select one: A. Citrate is the allosteric inhibitor of hexokinase. B. AMP is the alloseric activator of pyruvate dehydrogenase. C. Glucose-6-phosphate is the allosteric activator for phosphofructokinase. D. ATP is the activator of pyruvate kinase.arrow_forward
- Which of the following statements is/are TRUE about fatty acid activation before β-oxidation? I. The process consumes energy equivalent to two moles of ATP. II. The fatty acid is activated by ATP to give a fatty acyl-CoA.arrow_forwardGiven the statement on the image, which is/are true about fatty acid activation before beta oxidation?arrow_forwardIdentify the conversion which is not involved in glycolysis. a.Glucose to glucose 6-phosphate by hexokinase b.Triose phosphate to 2-phosphoglycerate by phosphoglyceromutase c.PEP to pyruvic acid by pyruvate kinase d.Sucrose to glucose and fructose by invertasearrow_forward
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