photosynthesis in higher plants class9 neet/সালোকসংশ্লেষ/light and dark reaction/class 11 /olympiad/vidyasagar science olympiad , what is photosynthesis, short notes of light reaction , dark reaction kelvin cycle, heal reaction,significant of photosynthesis, chlorophyll,z scheme,why called carbon assimilation, catabolic reaction ,oxidation and reduction .
সালোকসংশ্লেষ কাকে বলে, সালোকসংশ্লেষের দশা গুলি কি কি আলোক দশা সংক্ষিপ্ত আলোচনা, অন্ধকার সংক্ষিপ্ত আলোচনা ,সালোকসংশ্লেষ এর গুরুত্ব ,সালোকসংশ্লেষের সমীকরণ ,সালোকসংশ্লেষের কাঁচামাল
উপরিউক্ত বিষয়গুলোর ওপর ভিত্তি করে সালোকসংশ্লেষে সংক্ষিপ্ত আলোচনা করা হলো .
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. This chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are synthesized from carbon dioxide and water – hence the name photosynthesis, from the Greek phōs "light", and synthesis putting together".In most cases, oxygen is also released as a waste product. Most plants, algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth.
Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centers that contain green chlorophyll pigments. In plants, these proteins are held inside organelles called chloroplasts, which are most abundant in leaf cells, while in bacteria they are embedded in the plasma membrane. In these light-dependent reactions, some energy is used to strip electrons from suitable substances, such as water, producing oxygen gas. The hydrogen freed by the splitting of water is used in the creation of two further compounds that serve as short-term stores of energy, enabling its transfer to drive other reactions: these compounds are reduced nicotinamide adenine dinucleotide phosphate (NADPH) and adenosine triphosphate (ATP), the "energy currency" of cells.