If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), subsequent analysis will show that 18O first appears in which of the following molecules produced by the algae?

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Explanation:

O2- this is produced by oxidizing water in the light reaction.

Photosynthesis is a chemical process, essential to plant and other primary producers producing energy. Energy in the form of glucose molecules is derived from energy, water, and inorganic carbon dioxide, while it releases oxygen (from the light reaction). An increase in temperature will increase the rate of photosynthesis.

It happens in several complicated stages, photosynthesis is a rate-limited process, based on several conditions including concentration of carbon dioxide, ambient temperature and light intensity; energy is extracted from photons, i.e. light particles, and water is used as a reducing agent.

6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Carbon dioxide + water + energy= glucose + oxygen

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