First slide

Early Experiments

Question

Purple and green Sulphur bacteria use:

Easy

A

H₂S as Hydrogen donor
B

H₂O as Hydrogen donor
C

H₂S as oxidant
D

H₂O₂ as Hydrogen donor

Solution

H₂S is the hydrogen donor for purple and green Sulphur bacteria. The product released on oxidation is Sulphur or sulphate depending on the organism and not O₂.

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