Which of the following statements is incorrect regarding ketone bodies formation and their role in energy production and lipid metabolism? A. Ketone bodies result from the excess of beta-oxidation of fatty acids

B. Hydroxymethylglutaryl CoA is a ketone body intermediate and a key substrate for the biosynthesis of cholesterol

C. Ketone bodies are formed from the condensation of acetyl CoA

D. Ketone bodies are the main source of energy in normal cells

trachea, alveoli, lung capillaries, arteries

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.