Question

15
6 molecules of oxygen + 1 molecule of glucose → 6 molecules of carbon dioxide + 6 molecules of ______ + energy
complete the formula for respiration.
a oxygen
b carbon
c water

Explanation:

The chemical equation for cellular respiration is \( C_6H_{12}O_6 + 6O_2
ightarrow 6CO_2 + 6H_2O + \text{energy} \). So, when 6 molecules of oxygen react with 1 molecule of glucose, the products are 6 molecules of carbon dioxide, 6 molecules of water, and energy. Among the options, water (H₂O) fits the blank. Oxygen is a reactant here, and carbon is not the molecule formed in this context.

Answer:

C. Water