Question

4. Describe photosynthesis process with figure?​

Answer 1

Photosynthesis : The process by which autotrophs take in substances from the outside ( in the form of$CO_2 and H_2O$) and convert them into stored forms of energy ( Carbohydrates) in the pressence of sunlight and chlorophyll.

Explanation:

Note : Carbohydrates are utilised for providing energy to the plant. the carbohydrates which are not used immediately are stored in the form of starch, which serves as the internal energy reserve to be used as and when required by the plant.

Remember : In animals and in our body energy is stored in the form of glycogen.

The following events take place during photosynthesis :

1. Absorption of light energy ( by chlorophyll)
2. Splitting of water molecules into hydrogen and oxygen ( photolysis of water)
3. Conversion of light energy to chemical energy ( in the form of ATP and NADPH)
4. Reduction of CO2 to Carbohydrates ( assimilation of carbon).

The following reaction takes place during photosynthesis :

$6CO_2 + 6H_2O ⸻➤C_6H_12O_6 +6O_2$

• $CO_2 - Carbondioxide$
• $H_2O - water$
• $C_6H_12O_6 - Glucose$
• $O_2 - Oxygen$

Answer 2

Question :-

What is photosynthesis?

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Answer :-

The process by which green plants and some other organisms use sunlight to synthesize nutrients for their nourishment is called Photosynthesis.

Some requirements of photosynthesis to take place :-

• Presence of carbon dioxide.

• Presence of water.

• In plants, in photosynthesis, require a green coloured pigment named 'Chlorophyll'.

• Presence of Sunlight.

• A temperature of 25°C to 40°C is needed.

Result ( product ) of photosynthesis :-

When the process of photosynthesis is completed, it releases Oxygen as a by-product.

Chemical Equation for Photosynthesis :-

$\sf6CO_2 + 6H_2O \binom{sunlight \: and \: chorophyll}{ \rightarrow} C_6H _ {12}{O_6 +6O_2}\uparrow$

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