Question

Where is the energy stored in ATP molecules?

Answer 1

The links that connect the phosphate groups store energy. The third phosphate group is held together by a covalent link that carries around 7,300 calories of energy. This covalent bond is known as a pyrophosphate bond. The breakdown of meals and phosphocreatine provide energy for the creation of ATP.

Complete answer:
Adenosine triphosphate (ATP) is a kind of adenosine.
When energy is required and the bond between the final phosphate group and the rest of the ATP molecule is broken, a great quantity of energy is released in the process..

The energy currency of life is adenosine triphosphate (ATP). The energy produced in mitochondria during cellular respiration is stored in the form of ATP. Its breakdown into ADP and Pi supplies energy for all biological functions. Three phosphate groups with a strong energy link make up ATP. When ATP is hydrolyzed, energy is released and ADP is produced. Because the basic process, ATP + $H_2O$ ADP + Pi, contains a water molecule, it is generally referred to as ATP hydrolysis.

The primary molecule for storing and transferring energy in cells is adenosine 5'-triphosphate, or ATP. It's commonly referred to as the cell's energy currency, and it's similar to storing money in a bank.
In the reaction ADP+Pi free energy ATP+$H_2O$, ADP is coupled with a phosphate to generate ATP. The energy generated by ATP hydrolysis is used to accomplish cellular labour, which is normally done by combining the exergonic reaction of ATP hydrolysis with endergonic reactions.

Note:-
Photosynthesis is the process by which plants use sunlight to energise and create glucose from available water and carbon dioxide. This glucose can be converted to pyruvate via many routes. Pyruvate produces ATP through cellular respiration (adenosine triphosphate). ATP can be produced aerobically (with oxygen) or anaerobically (absence of oxygen).