<prompt> Ketone bodies cannot be utilized by which of the following?Skeletal muscleRed blood cellsBrainHeart  <response>: Ans. b. Red blood cells Ref: Harpers 27e p190-191Ketone bodies cannot be utilized Red blood cells.Substrate utilized for energy productionOrganFedFastingStarvationBrainGlucoseGlucoseKetone bodiesQHeartFatty acidQFatty acidKetone bodiesLiverGlucoseFatty acidAmino acidMusclesGlucoseFatty acidFatty acidHeart utilizes fatty acids even in fed state. Brain doesnt use fatty acid for energy production. 