<P> Photosynthesis occurs in two stages in a cell . In the first stage , light - dependent reactions capture the energy of light and use it to make the energy - storage and transport molecules ATP and NADPH . The Calvin cycle uses the energy from short - lived electronically excited carriers to convert carbon dioxide and water into organic compounds that can be used by the organism ( and by animals that feed on it ) . This set of reactions is also called carbon fixation . The key enzyme of the cycle is called RuBisCO . In the following biochemical equations , the chemical species ( phosphates and carboxylic acids ) exist in equilibria among their various ionized states as governed by the pH . </P>
<P> Photosynthesis occurs in two stages in a cell . In the first stage , light - dependent reactions capture the energy of light and use it to make the energy - storage and transport molecules ATP and NADPH . The Calvin cycle uses the energy from short - lived electronically excited carriers to convert carbon dioxide and water into organic compounds that can be used by the organism ( and by animals that feed on it ) . This set of reactions is also called carbon fixation . The key enzyme of the cycle is called RuBisCO . In the following biochemical equations , the chemical species ( phosphates and carboxylic acids ) exist in equilibria among their various ionized states as governed by the pH . </P>
where does the calvin cycle get its energy
where does the calvin cycle get its energy
from short - lived electronically excited carriers
from short - lived electronically excited carriers