In half leaf experiment, a part of a leaf is enclosed in a …

Biology Photosynthesis in Higher Plants Single Correct MCQ

Published on: August 20, 2026

In half leaf experiment, a part of a leaf is enclosed in a test tube containing KOH soaked cotton, while the other half is exposed to air and then setup is placed in light for some time. It was later found that part of leaf, rich was exposed to air tested positive for starch. This indicates that

light is essential for photosynthesis

oxygen is liberated in photosynthesis

water is essential for photosynthesis because in KOH soaked leaf, starch synthesis does not occur as water reacts with KOH and it become unavailable for photosynthesis

carbon dioxide is essential for photosynthesis because in KOH soaked leaf, starch synthesis does not occur as O2 is absorbed by KOH and not available for photosynthesis

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