When is cyclic photophosphorylation

Natural Selection 3. Classification 4. Cladistics 6: Human Physiology 1. Digestion 2. The Blood System 3. Disease Defences 4. Gas Exchange 5. Homeostasis Higher Level 7: Nucleic Acids 1. DNA Structure 2. Transcription 3. Translation 8: Metabolism 1. Metabolism 2. Cell Respiration 3. This electron transport chain is very similar to the one in cellular respiration; however, the carrier proteins in the chloroplast ETC are different from those in the mitochondrial ETC.

The production of ATP in the chloroplast is called photophosphorylation because the energy harnessed in the process originally came from light. This process of ATP production is called non-cyclic photophosphorylation. The ATP generated in this process will provide the energy for the synthesis of glucose during the Calvin cycle light independent reactions. It takes place under the condition of low light intensity and light of wavelength lower than nm and when CO 2 fixation is inhibited.

Plants are capable of producing energy by utilizing photons from sunlight through photophosphorylation. Plants spread their leaves to the sky in order to carry out light reactions of photosynthesis and by doing this, they absorb some energy. This energy is then converted into chemical energy to provide energy for the normal physiological functioning of plants.

In this reaction, light provides the energy and water provides the electron-molecule. This is a major difference between photosynthesis and cellular respiration. During this reaction, photosynthetic pigments of plants absorb light that activates series of cellular process that ultimately converts light energy into chemical energy and stored in the bonds of the energy molecule ATP.

The process of utilizing light energy and electron transport chain to make ATP is known as photophosphorylation. This reaction's name itself suggests the process of gaining a phosphate molecule. Hence, photophosphorylation is also called as light reactions of photosynthesis. The electron transport chains for photosynthesis is carried out in the thylakoid membranes of chloroplasts.

This is mainly due to the availability of chlorophyll molecules and accessory pigments to absorb light energy. These both are must required ingredients in order to produce ATP molecule while utilizing energy from sunlight.

Chlorophyll molecule acts as a reaction centers and the remaining molecules such as pigments within the membrane form an antenna complex. Antenna complex, as the name suggests, it is responsible for the absorption of light energy also known as photon molecule and then, it transfers energy into the reaction centers. These reaction centers are key locations where the photon energy is transferred into the electron transport system. Bassham - - Proc. Tanner - - Ber. Bianchetti amp; B. Thomas amp; J.

Goedheer, Eds. Donker, Rotterdam. Simonis - - Biochem. Junk N. Publishers, The Hague Forti 1 L. Rosa 1 1. Personalised recommendations.