Question

what is photosynthesis ???? ​

Answer 1

Photosynthesis

⚛ Definition of Photosynthesis

• The process in which Green plants (called Autotrophs ) prepare their own food with the help of raw Materials like Carbon-dioxide and Water in presence of sunlight and green pigment chlorophyll to form Glucose and oxygen (as bi-product) is known as Photosynthesis.

⚛ Raw material of photosynthesis

• Carbon dioxide and water are considered as raw material of photosynthesis.

⚛ Products of photosynthesis

• When Carbon dioxide and water with sunlight react in presence of chlorophyll then Glucose and oxygen are formed as products.

⚛ Chemical equation for the process of photosynthesis

• $\red{\sf{6CO_{2} + 6H_{2}O \underset{sunlight}{\xrightarrow{chlorophyll}}C_{6}H_{12}O_{6} + 6O_2} }$

• $\bullet \: \sf{CO_2\: from \: air} \\ \bullet \: \sf{H_2O \: from \: soil} \\ \bullet \: \sf{light \: energy \: from \: sun}$

⚛ Site of photosynthesis

• In green plants photosynthesis take place in the chloroplasts which contain green pigment chlorophyll.

⚛ Events that occur during photosynthesis

• Abosorption of sunlight energy by chlorophyll.
• Conversion of light energy into chemical energy and spliiting of water molecules into hydrogen and oxygen by light energy ( process is called photolysis).
• Reduction of Carbon dioxide by hydrogen to form Carbohydrate like glucose by utilising the chemical energy (obtained by transformation of light energy).

☯ What happens to Extra glucose formed during the process of photosynthesis

• The food prepared by the green leaves of a plant is in the form of simple sugar called glucose. This glucose food is prepared in the leaves and then sent to different parts of the plant.
• The extra glucose is changed into another food called starch. This starch is stored in the leaves of the plant.

• (Glucose and starch belong to a category of foods called Carbohydrates).

Answer 2

Answer:

photosynthesis is the process of plants preparing their own food with the help of chlorophyll , sunlight , water and nutrients

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