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Use of which of the following isotope can help us in determining that source of oxygen released during photosynthesis is water not $C O_{2}$ ?

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$P^{32}$

$S^{35}$

$O^{18}$

$O^{14}$

answer is C.

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Detailed Solution

$O^{18} -$ was used in $H_{2} O$ , oxygen released during photosynthesis is from water not from carbondioxide , because we used radio active oxygen in water and the oxygen released as biproduct is also radiactive

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