Which one of the following statements is true about the control of carbohydrate metabolism?  

Which is the major factor(s) determining whether glucose is oxidized by aerobic or anaerobic glycolysis?A) Presence of high AMPB) NADH and the ATP/ADP ratioC) Ca+2D) FADH2

Which enzyme catalyzes the conversion of pyruvate to oxaloacetate?A) Pyruvate carboxylaseB) Pyruvate dehydrogenaseC) Pyruvate kinaseD) Phosphofructokinase-1

Propranolol (Kd= 0.005 µM) is an epinephrine (β-adrenergic) receptor antagonist. Which statement best describes epinephrine (Kd= 5 µM) signaling in the presence of propranolol? A) Propranolol will bind the receptor with higher affinity and mimic epinephrine B) Propranolol will bind the receptor with higher affinity and block epinephrine C) Epinephrine will bind the receptor with higher affinity and signaling will continue as normal D) Propranolol and epinephrine will bind at different sites on the receptor and signaling will be blocked

Which enzyme converts an aldose to a ketose in glycolysis? A) phosphohexose isomerase (step 2) B) phosphofructokinase-1 (step 3) C) phosphoglycerate mutase (step 8) D) enolase (step 9)

HK1 is a glucokinase, is restricted primarily to the liver and pancreas

Gluconeogenesis involves the conversion of ____________A) Glucose to pyruvateB) Pyruvate to glucoseC) Phosphoenolpyruvate to glucoseD) Pyruvate to fructose

All of the following are part of the Cori Cycle except: A) Lactate is the result of anaerobic glycolysis in a number of tissues B) Lactate travels to the liver C) Lactate is converted to glucose in the liver D) ATP is produced by the conversion of lactate to glucose

Which of the following products cannot be directly formed from pyruvate? A) Acetaldehyde B) Ethanol C) Acetyl-CoA D) Lactic acid

Metabolism refers to: A) Pathways of chemical reactions that build compounds B) Glycolysis pathway C) The process of photosynthesis D) The entire network of chemical reactions involved in maintaining life and encompasses all of the sequences of chemical reactions that occur in the body.