BIOLOGY Class 1ST JUNE 2021

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 Thllakoids -


Stacks of grans which is pocket like structure and form compact granum.

Thylakoids of one granum connected to other granum with the help of lamella called stroma lamellae which is also known as fret channel and named after the scientist FRET.


The green colour photosynthetic pigments chlorophyll and caretenoids are located in the membrane of thllakoids. These are the site of light reaction of photosynthesis.


RAW MATERIALS FOR PHOTOSYNTHESIS - :

Green plants takes carbon dioxide and water from surrounding environment and convert them into simple carbohydrate ( many sugar molecules ) starch.

Thus carbon dioxide and water h20 are the raw materials for photosynthesis.


The terrestrial plants get carbon dioxide through stomata present on epidermal layer (epidermis) very small pores made up of two v shape (kidney shape) guard cells who control the opening and closing of stomata.


The aquatic plants (hyrophytes) take dissolve form of carbon dioxide to the guard surface of plant body.


Water is an important raw material for photosynthesis because it get oxidised in presence of light. 


PHOTOSYNTHESIS OR PHOTO OXIDATION - :

The breakdown of water in presence of sunlight to release necessary electrons and protons which pass through ETS ( e- transport system ) to generate the assimilatory power which is used to collect carbon, oxygen, hydrogen. 


Water is also responsible for the release of molecular oxygen which goes into the atmosphere. 


THANK YOU so much 

Dewanshu rai

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