Write the important aspects about the overall chemical equation of respiration, pertaining to the following :

1. number of steps for glucose to break down into CO₂ and H₂O.
2. involvement of enzymes.
3. forms of energy liberated.

1. The breakdown of glucose to carbon dioxide and water does not occur in a single step, but in a series of chemical steps. These steps occur in two major phases — (i) glycolysis (glucose → pyruvate) occurring in cytoplasm and (ii) Krebs cycle (pyruvate → CO₂ + 6H₂O + ATP) occurring in mitochondria.
2. Each breakdown step occurs due to a particular enzyme.
3. The energy liberated in the breakdown of glucose molecule is not all in the form of heat, but a large part of it is converted into chemical energy in the form of ATP.