Final answer:
The energy in glucose is used by all living things through a process called cellular respiration, which converts glucose into ATP, the cell's main energy carrier.
Step-by-step explanation:
To use the energy in glucose molecules, the glucose must undergo a process known as cellular respiration. In this process, the chemical energy stored in glucose is transferred and transformed into energy within molecules of ATP (adenosine triphosphate). ATP is the main energy currency of the cell, and it powers a variety of cellular activities, including muscle contraction, molecule synthesis, and the transport of substances across cell membranes. The glucose molecule is completely oxidized during cellular respiration, and the energy it contained is efficiently harnessed to regenerate ATP from ADP and inorganic phosphate.