In the context of cellular respiration, the equation typically represents the process by which glucose is broken down in the presence of oxygen to produce carbon dioxide, water, and energy (in the form of ATP).
The general equation for cellular respiration can be written as:
\[ \text{Glucose} + \text{Oxygen} \rightarrow \text{Carbon Dioxide} + \text{Water} + \text{Energy} \]
Based on this understanding, in your equation:
X likely represents glucose and Y represents oxygen.
Therefore, the correct answer is:
X represents glucose and Y represents oxygen.