Question

Which of the following releases energy?

Nutrients entering a cell through the cell membrane
 Removing a phosphate group from an ATP molecule
    Building sugar or starch molecules for long-term energy storage
 Adding an additional phosphate group to an ADP molecule

Answer 1

2. Removing a phosphate group from an ATP molecule, the other processors will need energy

Answer 2

Removing a phosphate group from an ATP molecule

Step-by-step explanation:

ATP or Adenosine triphosphate is the energy currency of the cell. It is made of adenine base attached to a ribose sugar and three phosphate groups. The three phosphate groups are bonded via two phosphoanhydride bonds. Both these bonds are high energy bonds. When they are broken, a lot of energy is released. Removal of first phosphate group converts ATP into ADP and energy is released. Removal of second phosphate group converts ADP into AMP and again energy is released but this time it is less than former.