Question

Hydrogen donor in photosynthesis of purple$/$ green sulphur bacteria is

• A. $H_{2}S$
• B. $H_{2}O$
• C. $N{H}_3$
• D. $H_{2}S{O}_3$

Answer 1

Answer: (A)

$H_{2}S$

Certain bacteria perform bacterial photosynthesis in a similar way to plants. They contain light-harvesting pigments, absorb carbon dioxide and release oxygen in presence of sunlight. The example includes purple / green sulphur bacteria. In this bacteria, the hydrogen donor is H${}_2$S. The elemental sulphur is released unlike oxygen in plant photosynthesis.

Thus, the correct answer is 'H${}_2$S.'