Read the passage given below and answer the following questions from (i) to (v).
Traditionally the process of respiration is divided into three phases:
(1) ventilation of the gas exchange organs better known as breathing, (2) transport of respiratory gases and, (3) cellular respiration.We assimilate chemical energy from the environment and transfer it from molecule to molecule in a stepwise fashion within our cells. Although studied separately, these phases represent a continuum and processes of cellular respiration in all life forms is mostly common.
(i) The energy released during cellular respiration is immediately used to synthesise a molecule called _______ which is used to fuel all other activities in the cell.
(1)