Question

The following two chemical reactions are supposed to indicate a certain process occurring in the green plants under two different conditions:

(a) C₆H₁₂O₆ + 6O₂ → 6CO₂ + _______ + 38 ATP

(b) C₆H₁₂O₆ → ________ + 2 CO₂ + 2 ATP

(i) Fill in the blank in each reaction.

(ii) Name the process represented by the two reactions.

(iii) What are the conditions under which the two reactions (a) and (b) are occurring respectively?

Answer 1

(i)
(a) C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + 38 ATP

(b) C₆H₁₂O₆ → C₂H₅OH + 2 CO₂ + 2 ATP 

(ii)
(a) Aerobic respiration;
(b) Anaerobic respiration

(iii) Reaction

(a) can be completed only in the presence of oxygen, while reaction

(b) can be completed in the absence of oxygen.