Indicate whether the following reactions are aerobic, anoxic or anaerobic. Also
ID: 1067158 • Letter: I
Question
Indicate whether the following reactions are aerobic, anoxic or anaerobic. Also indicate the oxidizing agent (electron acceptor) and reducing agent (electron donor) for the reactions. Indicate the type of bacteria carrying out the reaction (heterotrophic or auto and chemo or lithotrophic) C_18H_36 + O_2 rightarrow CO_2 + H_2O + new cells [CNO] H_2S + O_2 + CO_2 rightarrow H_2O + S + new cells [CNO] CH_3CHOHCOOH + SO_4 rightarrow 2CH_3COOH + H_2S + 2HCO_3 + new cells [CNO (lactic acid) (acetic acid) C_6H_12O_6 + 24 KNOs rightarrow 30CO_2 + 18H_2O + 24KOH + 12N_2 + new cells [CNO]Explanation / Answer
(a) Aerobic reaction because it is occuring in the presence of air (O2)
O2 is oxidising agent
C18H36 is reducing agent
(b) Aerobic reaction
O2 is oxidising agent. It oxidises H2S to S
H2S is reducing agent. it reduces O2 to H2O
(c) Anaerobic reaction
Lactic acid is reducing agent
H2S is oxidising agent
(d) Anaerobic reaction
C6H12O6 is reducing agent
KNO3 is oxidising agent.