Energy is Required to Link a Phosphate Group to ADP

Question

Energy is required to link a phosphate group to ADP to make ATP. Where does the energy come from?
A) vitamins
B) enzymes
C) food we eat
D) breathing

Accepted Answer

The energy required to link a phosphate group to ADP to make ATP comes from the food that we eat. The process of breaking down food molecules in cellular respiration generates ATP, which can then be used for energy-requiring processes in the cell.