Final answer:
Living cells obtain energy through metabolism, which involves chemical reactions. Cellular energy comes in the form of ATP molecules, which provide readily available energy for various cellular activities.
Step-by-step explanation:
Living cells obtain energy through a process called metabolism, which involves chemical reactions taking place within the cell. These reactions can be categorized into two types: catabolic reactions, which involve breaking down complex molecules and release energy, and anabolic reactions, which involve building complex molecules and require energy.
Cellular energy can take the form of various types of energy, including thermal energy and chemical energy. However, the term cellular energy specifically refers to the energy in the form of ATP (adenosine triphosphate) molecules. ATP is a molecule that provides readily available energy for various cellular activities.
For example, cells use ATP to power the synthesis and breakdown of molecules, transport of nutrients, waste export, and movement. By harnessing the energy stored in ATP molecules, cells can perform the work required for their survival and functioning.