1. In the bonds between atoms:
* Chemical energy: This is the most common form of energy storage in molecules. It's the energy held within the chemical bonds between atoms. When these bonds are broken, energy is released, and when new bonds are formed, energy is stored.
* Potential energy: This refers to the energy stored within a molecule due to its position or arrangement of atoms. Different types of bonds hold different amounts of energy. For example, a carbon-carbon double bond holds more energy than a carbon-carbon single bond.
2. In the movement of molecules:
* Kinetic energy: This is the energy of motion. Molecules can store energy as they move, rotate, and vibrate. The faster the molecules move, the more kinetic energy they have. This energy is often related to temperature.
Here are some specific examples:
* Carbohydrates: Glucose, a simple sugar, stores chemical energy in its carbon-hydrogen and carbon-oxygen bonds. This energy is released when glucose is broken down during cellular respiration.
* Lipids (fats): Fats store energy in their long hydrocarbon chains, which are rich in carbon-hydrogen bonds. They release more energy per gram than carbohydrates.
* ATP (adenosine triphosphate): This is the primary energy currency of cells. It stores energy in the bonds between its phosphate groups. When one phosphate group is removed, energy is released for cellular processes.
Important Note:
The amount of energy stored in a molecule depends on the type of molecule and the strength of its bonds. For example, molecules with many strong bonds, like fats, store a lot of energy. Molecules with weak bonds, like water, store less energy.