Question

respiration is an energy releasing path way do you agree? justify your answer.

Answer 1

yes, it is.
                 in cytoplasm                  absence of O2 (in yeast)                (anaerobic respiration)
glucose  ============>pyruvate============> Ethanol+Co2+energy(2 carbon molecule)   (6 carbon molecule)      (3 carbon molecule)
                                               + energy
                  in cytoplasm                  lack of O2      (in our muscle cells)  
glucose  ============>pyruvate============>   lactic acid+energy(3 carbon molecule)  
(6 carbon molecule)      (3 carbon molecule + energy)

                  in cytoplasm                 presence of O2    (in mitochondria)  
glucose  ============>pyruvate============>   CO2+water+energy  
(6 carbon molecule)      (3 carbon molecule + energy)