Question

If green plant cells are incubated with $O^{18}$- labelled water, which of the following molecules will become radioactive when the cells are exposed to light?

• A. $O_2$
• B. $C{O}_2$
• C. $H_{2}O$
• D. sugar

Answer 1

Answer: (A)

Correct answer is (a) $O_2$