Answer to Question #5034 in Biology for brenda

Question

what are the chemical journeys of a carbon atom from carbon dioxide in the air and a hydrogen atom from a water molecule that have entered a plant cell

Answer 1

Plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the Calvin cycle, which is driven by the ATP and NADPH produced in the light reactions.

A hydrogen atom from a water molecule have entered a plant cell - in chloroplast, where several of them react by transporting protons across the membrane, generating a gradient of proton concentration for further ATP generating.