Cells are the fundamental building blocks of life and require energy to perform their various functions. This energy is derived from the breakdown of food molecules through a process called cellular respiration. This process releases energy stored within the chemical bonds of food molecules, which is then used to power cellular processes.
However, cells don't use the energy released from oxidation reactions directly. Instead, they convert it into small, energy-rich molecules such as ATP (adenosine triphosphate) and NADH (nicotinamide adenine dinucleotide). These molecules act as energy carriers, transporting energy throughout the cell to power various metabolic reactions and build new cellular components.
In summary, ATP and NADH power up a cell by providing the energy necessary for vital cellular functions.
