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Biology Question on Exchange Of Gases

Which of the following equations is correct?

A

CO2→H2CO3→HCO3−+H+CO_{2} \to H_{2}CO_{3} \to HCO_{3}^{-} + H^{+}

B

\ceCO2+H2O<=>[Carbonic][anhydrase]H2CO3\ce{CO2 + H2O <=>[\text{Carbonic}][\text{anhydrase}] H2CO3} \ce<=>[Carbonic][anhydrase]H++HCO3−\ce{ <=>[\text{Carbonic}][\text{anhydrase}] H+ + HCO^{-}_3}

C

CO2+H2O→CH4+2O2CO_2 + H_2O \to CH_4 + 2O_2

D

\ceCO2+H2O<=>CO+H2O2\ce{CO2 + H2O <=> CO + H2O2 }

Answer

\ceCO2+H2O<=>[Carbonic][anhydrase]H2CO3\ce{CO2 + H2O <=>[\text{Carbonic}][\text{anhydrase}] H2CO3} \ce<=>[Carbonic][anhydrase]H++HCO3−\ce{ <=>[\text{Carbonic}][\text{anhydrase}] H+ + HCO^{-}_3}

Explanation

Solution

Answer (b) CO2+H2O<=>[Carbonic][anhydrase]H2CO3 {CO2 + H2O <=>[\text{Carbonic}][\text{anhydrase}] H2CO3} <=>[Carbonic][anhydrase]H++HCO3− { <=>[\text{Carbonic}][\text{anhydrase}] H+ + HCO^{-}_3}