<prompt> Which of the following is true about ketone bodies:Acetoacetate is most common ketone body present in bloodBeta hydroxybutyrate is the first ketone body to be synthesizedThiophorase is absent in liverMuscle can not utilize ketone bodies  <response>: Ketone Body Synthesis Catabolic pathway Occurs in mitochondria Activated by glucagon Occur in liver 1st ketone body - acetoacetate Most common ketone body - Beta hydroxy butyrate Found in blood and urine Ketone Body Utilization Catabolic pathway Occurs in mitochondria Activated by glucagon Occur in brain, hea and muscles Thiophorase is absent in liver so ketone bodies cannot be utilized by liver. 