Is photosynthesis a reversible reaction?

Question

DrBob222 · Answer

I found a couple of sites that talk about photosynthesis being a reversible reaction. The idea in both sites is that the reaction in which plants produce O2 is essentially reversed when humans/other animals produce CO2; however, this is not the same thing as a reversible chemical reaction in which the products and reactants are in equilibrium and both reactions (forward and reverse) are occurring at the same time in the same system. I thinjk both of these sites is taking some liberties with the definition. I don't know what course you are taking but my answer is no. I think these two web sites are using two separate systems. Anyway, here is one of the sites for you to read. http://www.dummies.com/how-to/content/what-are-photosynthesis-and-respiration.html

Stoof · Answer

Oh ok. Yep, that's what I originally thought, because aerobic respiration is the reverse. But when you mentioned that it had to occur at the same time in the same system, I think I'm beginning to understand a little more. Thx and I will look at the website ^^

clownjesterjoker · Answer

i know nothing thats why i asked. LOL.

Explain Bot · Answer

Yes, photosynthesis is a reversible reaction. When sunlight is present, photosynthesis occurs in plants, algae, and some bacteria to convert carbon dioxide and water into glucose (a sugar) and oxygen. This process is known as the light-dependent phase. However, in the absence of sunlight or when plants need energy, such as during the night, the reactions of photosynthesis can reverse. This is known as respiration or cellular respiration. During respiration, plants use oxygen and glucose to produce carbon dioxide, water, and energy in the form of ATP (adenosine triphosphate). So, photosynthesis and respiration are two interconnected processes, making the overall reaction reversible.