Question

Name the principle center of photosynthesis and write its types.( Hint :class 10cbse lesson name life processes.)

Answer 1

The process by which plants make their own food using chlorophyll, carbon dioxide and water in the presence of sunlight is known as photosynthesis.
Photosynthesis is the conversion of light energy into chemical energy by living organisms. The raw materials are carbon dioxide and water. The energy source is sunlight, and the end-products include glucose and oxygen.since nearly all life depends on it. It is a complex process occurring in higher plants.

Chemical equation-

6CO2 + 6H2O --------in presence of sunlight and clorophyll---------- C6H12O6 + 6O2

Answer 2

A photosynthetic reaction centre is a complex of several proteins, pigments and other co-factors that together execute the primary energy conversion reactions of photosynthesis. Molecular excitations, either originating directly from sunlight or transferred as excitation energy via light-harvesting antenna systems, give rise to electron transfer reactions along the path of a series of protein-bound co-factors. These co-factors are light-absorbing molecules (also named chromophores or pigments) such as chlorophyll and phaeophytin, as well as quinones. The energy of the photon is used to excite an electron of a pigment. The free energy created is then used to reduce a chain of nearby electron acceptors, which have subsequently higher redox-potentials. These electron transfer steps are the initial phase of a series of energy conversion reactions, ultimately resulting in the conversion of the energy of photons to the storage of that energy by the production of chemical bonds.