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Question

Isotope popularly known to have been used in the study of photosynthesis are

A
C14 and O18
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B
C11 and C32
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C
C16 and N15
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D
P32 and C15
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Solution

The correct option is A C14 and O18
Oxygen-18 is a natural, stable isotope of oxygen. Oxygen 18 was used to give an insight into photosynthesis, as it allows the amount of oxygen taken up during photosynthesis to be measured and showed, where the oxygen came from and from where it ended up. Carbon-14 is a radioactive isotope of carbon, naturally found in the stratosphere and troposphere and is used in radiocarbon dating to date an archaeological, geological and hydrogeological samples.

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