Multiple choice

The hydrogen donor in bacterial photosynthesis is

  1. water

  2. hydrogen sulphide

  3. sulphuric acid

  4. ammonia

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unlike oxygenic photosynthesis in plants, bacterial photosynthesis (such as in green and purple sulfur bacteria) uses hydrogen sulfide (H2S) as an electron donor instead of water.