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Carbohydrates, the most abundant biomolecules on earth, are produced by

(a) all bacteria, fungi and algae Your answer
(b) some bacteria, algae and green plant cells Correct
(c) viruses, fungi and bacteria Your answer
(d) fungi, algae and green plant cells Your answer

Your answer: Correct answer: (b)

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Explanation

Why (b) is correct

Carbohydrates are made by photosynthesis, which occurs in some bacteria (photosynthetic bacteria and cyanobacteria), algae and green plant cells.

Why the other options are wrong

(a) · your answer Not all bacteria photosynthesise, and fungi do not photosynthesise.
(c) · your answer Viruses and fungi do not photosynthesise.
(d) · your answer Fungi do not photosynthesise.

NCERT point: Only organisms with photosynthetic pigments can make carbohydrates from CO₂.

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