If the energy state of the cell is low high amounts of which
     If the energy state of the cell is low, high amounts of which cellular signals below would increase the action of the rate limiting enzyme of Krebs (citric acid) cycle  Iron and calcium  ADP, lactate,  high amounts of ADP, NAD & FAD  None of the above are correct  high amounts of ADP & ATP,  creatine supplementation would most benefit  50 km cross country ski racer  The aerobic or long term energy system  Playing a game of baseball  Enhance performance of repeated bouts of high-intensity exercise (example resistance training)  During exercise, the fate of the  formed from glycolysis from a sedentary person would be 
  
  Solution
15.Answer c. The alpha ketoglutarate dehydrogenase enzyme activity is regulated by ATP/ADP ratio and NADH/ NAD+ ratio and substrate availability.
16.Answer d: Creatine will be useful in high intensity excercise for short duration as it help in ATP production in muscle thus giving energy to muscle to work better

