Photosynthesis Light Dependent Reactions Calvin Cycle Cell Biology Learn about photosynthesis and the light dependent reactions in this first animation of my photosynthesis animations series! then try the photosynthesis int. The overall function of light dependent reactions is to convert solar energy into chemical energy in the form of nadph and atp. this chemical energy supports the light independent reactions and fuels the assembly of sugar molecules. the light dependent reactions are depicted in figure 8.15. protein complexes and pigment molecules work together.
Photosynthesis And Light Dependent Reactions The photon causes an electron in the chlorophyll to become “excited.”. the energy given to the electron allows it to break free from an atom of the chlorophyll molecule. chlorophyll is therefore said to “donate” an electron (figure 5.2.5 5.2. 5). to replace the electron in the chlorophyll, a molecule of water is split. The net reaction of all light dependent reactions in oxygenic photosynthesis is: 2h 2 o 2nadp 3adp 3pi → o 2 2nadph 3atp key points light energy splits water and extracts electrons in photosystem ii (psii); then electrons are moved from psii to cytochrome b6f to photosystem i (psi) and reduce in energy. In photosynthesis, carotenoids function as photosynthetic pigments that are very efficient molecules for the disposal of excess energy. when a leaf is exposed to full sun, the light dependent reactions are required to process an enormous amount of energy; if that energy is not handled properly, it can do significant damage. How light dependent reactions work. the overall purpose of the light dependent reactions is to convert light energy into chemical energy. this chemical energy will be used by the calvin cycle to fuel the assembly of sugar molecules. the light dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem.
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