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Question: Answered & Verified by Expert
Carbohydrates, the most abundant biomolecules on earth, are produced by:
BiologyBiomolecules (B)JIPMERJIPMER 2007
Options:
  • A all bacteria, fungi and algae
  • B fungi, algae and green plant cells
  • C some bacteria, algae and green plant cells
  • D viruses, fungi and bacteria
Solution:
1040 Upvotes Verified Answer
The correct answer is: some bacteria, algae and green plant cells
Some photosynthetic bacteria such as Rhodopseudomonas can prepare carbohydrates. But during this type of food synthesis $\mathrm{O}_2$ does not evolved because in this case hydrogen donor is other than $\mathrm{H}_2 \mathrm{O}$. Algae (green and blue green) and all green plant cells prepare their food (carbohydrate) through photosynthesis.
Here, hydrogen ions are donated by water molecules by the process of photolysis of water i.e., $\mathrm{O}_2$ is released during this type of food synthesis.

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