To produce energy for plants during the day time. ( courtesy Blackman high school )
The two major sets of reactions involved in photosynthesis are the light-dependent reactions and the light-independent reactions (Calvin cycle). In the light-dependent reactions, light energy is used to produce ATP and NADPH, while in the Calvin cycle, ATP and NADPH are used to convert carbon dioxide into glucose.
The products of light-dependent reactions are used in light-independent reactions.
The light reactions provide energy carriers for the dark reactions.
Light-dependent reactions are those that require light to proceed.
Differences: >light reactions occur in the thykaloid membranes, but dark occur in stroma >light reactions are light dependent, or they need light to take place, whereas dark reactions don't > dark reactions use the products of the light reactions >light reactions are the first step of photosynthesis and dark reactions are the second step Similarities: >both in photosynthesis Thats really the only similarity!!! hope this helps :)
Photosynthesis consists of light-dependent reactions and light-independent reactions. These light reactions occur within the chloroplast thylakoids, where the aforementioned chlorophyll pigments are found.
The light reactions provide energy carriers for the darl reactions.
The light reactions provide energy carriers for the dark reactions.
The Calvin cycle does not require light, these reactions are also called the Light Independent reactions.
In photosynthesis, there are three distinct stages that occur between the point when light first encounters chlorophyll (light-dependent reactions) and when the energy can be used by the plant (Calvin cycle or light-independent reactions). These stages involve capturing and converting light energy into chemical energy, producing ATP and NADPH, and using these compounds to fix carbon dioxide and create glucose.
The initial reactions in photosynthesis are known as the light-dependent reactions. These reactions occur in the thylakoid membranes of the chloroplast and involve the absorption of light energy to drive the conversion of water into oxygen, ATP, and NADPH.
The energy sources needed for the light reactions in photosynthesis are light (photons), which are absorbed by chlorophyll. The energy sources needed for the carbon reactions (Calvin cycle) are ATP and NADPH, which are produced during the light reactions.