The daily energy requirement for an active adult human is around 2500 calories per day. A nutritional calorie is equal to 4.2 kJ of energy. If each ATP contains -30 kJ/mol under standard conditions, how many molecules of ATP does the body require each day? Answer A. 1.69x1026 B. 1.19x1025 C. 2.11x1026 D. 2.11x106 E. 1.21x1027