Question

if you exposed a photosynthesizing plant to water that contains both radioactive h and radioactive o, in which of the products of photosynthesis will the radioactive h and o show up?
h and o both in glucose
h in glucose: o in water
h in water: o in glucose
h in glucose and water: o in o2
h in glucose and water: o in water and o2

Explanation:

During photosynthesis, water (\(H_2O\)) is split in the light - dependent reactions. The oxygen (\(O\)) from water is released as \(O_2\). The hydrogen (\(H\)) from water is used in the formation of glucose (\(C_6H_{12}O_6\)) and also remains in water (as not all water is split at once). So, the radioactive \(H\) will be in glucose (used in the synthesis) and remaining water. The radioactive \(O\) will be in the released \(O_2\) and remaining water (since water is the source of \(O\) for \(O_2\) production and there is un - split water).

Answer:

H in glucose and water; O in water and O2