Question

Warburg effect is related with

• A. Concentration of $O_2$.
• B. Concentration of $N_2$.
• C. Concentration of $H_2$.
• D. Concentration of $Cl$${}^{-}$.

Answer 1

The correct option is A Concentration of $O_2$.

The Warburg effect is the decrease of photosynthesis by high oxygen concentrations. Oxygen is a competitive inhibitor of the carbon dioxide fixation by RuBisCO, which initiates photosynthesis.Warburg effect is also due to the process of photorespiration. At high oxygen concentrations, there is a decrease in photosynthesis yield due to wasteful photorespiration process occurring in $C_3$ plants and inhibition of RuBisCO.