Question

why ATP is alone used in ellular respiration and why not GTP TPP CTP

Answer 1

ATP is used as energy currency in almost all living organisms because—
1. the energy that it carries is just right for all major biological reactions
2. ATP acts as a double energy packet by releasing two phosphates instead of one
3. it is a common component of many reactions on account of being metastable, that is it does not break down on its own over time and only on hydrolysis yields energy