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In purple and green bacteria, oxygen is not evolved during photosynthesis because hydrogen donor is
Options
(a) H₂O
(b) NH₃
(c) H₂S
(d) CH₄
Correct Answer:
H₂S
Explanation:
Purple and green bacteria are photoautotrophic bacteria which respectively have bacteriochlorophyll and bacteriophaeophytin as photosynthetic pigments. These bacteria perform anoxygenic photosynthesis i.e. no O₂ is evolved during photosynthesis because of this water is not used as a source of reducing power, instead hydreogen is obtained either directly (some purple bacteria) or from various types of inorganic and organic compounds, e.g., H₂S (green bacteria).
H₂S → 2(H) + S
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Topics: Photosynthesis in Higher Plants
(153)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In some plants anthers and stamen grow and mature at same time. This phenomenon
- Rhododendron is characteristic of vegetation of
- Gibberellin promote
- Tissue culture technique can produce infinite number of new plants
- Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of:
Topics: Photosynthesis in Higher Plants (153)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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