Choose the correct answer:
 
1. The process through which respiration takes place in Amoeba
 
2. Identify where the reaction takes place:

\(Pyruvate\) \(\rightarrow\) \(C_2H_5OH\) \(+\) \(CO_2\) \(+\) \(H_2O\)
 
3. Respiratory pigment in human beings is: