For an individual whose liver is regulated to have gluconeogenesis on and glycolysis off, when energy is needed - what is the major carbon source used to produce acetyl CoA? a. amino acids b. glyoxylate c. glucose d. fatty acids
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For an individual whose liver is regulated to have gluconeogenesis on and glycolysis off, when energy is needed - what is the major carbon source used to produce acetyl CoA?
a. amino acids
b. glyoxylate
c. glucose
d. fatty acids
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- Basal metabolic rate is a measure of ______. a. the total amount of calories you burn in 24 hours b. the amount of food energy needed to sustain basic body operations c. the amount of energy burned by skeletal muscle in a given period d. both a and bStudy Figure 19.18 and decide which of the following statements is false. Pyruvate dehydrogenase is inhibited by· NIADH. Pyruvate dehydrogenase is inhibited by AΤΡ. Citrate synthase is inhibited by NADH. Succinyl-CoA activates citrate synthase. Acetyl-CoA activates pyruvate carboxylase.At high energy charge (ATP/AMP ratio) AND low blood glucose levels a. Pyruvate is converted to glucose via gluconeogenesis b. Glycolysis is activated c. Fatty acids are converted to Acetyl-coA d. Gluconeogenesis is inhibited
- If glycogen is depleted in the liver, which of the following is also occurring? Group of answer choices a. Glycogenesis in the muscle b. Fatty acid release by adipocytes c. Glycolysis in the liver to gain ATP d. Glucose uptake in the musclesDuring the FEED cycle, the two major effects of INSULIN on the liver involves ____. Select one: a. glucose consumption (glycolysis and glycogen synthesis), fatty Acid and TAG synthesis b. glucose release and fatty acid synthesis c. TAG and fatty acid degradation d. gluconeogenesis and glycogenolysisWhich is true of brain metabolism in starvation? a. The brain can use glucogenic amino acids for energy b. The brain can only use glucose as fuel c. Up to a quarter of the energy requirement of the brain can come from fatty acids. d. Up to half the energy requirement of the brain can be met by ketone bodies
- The enzyme that decarboxylates pyruvate before it gets converted to Acetyl CoA is a. Pyruvate dehydrogenase b. Pyruvate decarboxylase c. Pyruvate carboxylase d. Pyruvate oxidative decarboxylaseDuring β-oxidation, the carbon backbone of fatty acids is converted into ________. A. pyruvate B. acetyl group C. glucose D. carbon dioxide E. triglycerideWhich one of the following statements concerning gluconeogenesis is correct? a. It is inhibited by elevated levels of acetyl CoA. b. It occurs in muscle. c. It is important in maintaining blood glucose during normal overnight fast. d. It is stimulated by fructose 2,6-bisphosphate.
- Which of the following choices describes a likely metabolic consequence of thiamin deficiency in animals. Select one: a. Increased gas production in the rumen b. Impaired vision c. Decreased ATP synthesis d. Increased osmotic water influx into the lumen of the small intestine e. Increased serum cholesterol in the bloodWhich of the following is true concerning the function of lipoic acid in pyruvate metabolism? a. transfer of acetyl groups b. pyruvate decarboxylation c. conversion of pyruvate to lactate d. oxidation of FADH2 to yield NADHWhich of the following can undergo metabolic conversion to acetyl CoA and enter the citric acid cycle? A. Fatty acids B. All of the choices are correct. C. Protein D. Glucose
