Question

how does cellular respiration begin?
c₆h₁₂o₆ + 6o₂ → 6co₂ + 6h₂o
sunlight jumpstarts cellular respiration
oxygen is mixed with glucose

Explanation:

Cellular respiration is a metabolic process. It begins with the breakdown of glucose in the presence of oxygen. The chemical equation for aerobic cellular respiration is $C_{6}H_{12}O_{6}+6O_{2}
ightarrow6CO_{2} + 6H_{2}O$. Sunlight is related to photosynthesis, not the start of cellular respiration.

Answer:

Oxygen is mixed with glucose