Question

Give a brief description of the process of synthesis of food in green plants.
Topic: Nutrition in Plants

Answer 1

" Photosynthesis "

It is the process by which green plant and some other organism use sunlight to synthesize nutrients from carbon dioxide and water.

The main product form here is glucose and by products are oxygen and water.

Here it takes place in chlorophyll and I'm presence of sunlight.

There are two stages of photosynthesis :

1. Light reactions :

It occurs in the grana where photon are absorbed so as to excite electrons of chlorophyll to a higher energy level. These activated elctrons are harnessed to form ATP from the ADP and reduce NADP to NADPH. Wayer ia also spotted here and oxygen is released.

2. Dark reactions :

Calvin cycle occurring in chlorophyll here carbon combine with 5-carbon sugar called ribulose biphospahte. This unstable compound breaks down into 3-carbon compound. This then forms glucose.

Answer 2

Dear Student,

● Photosynthesis -

• It is a process used by plants and other organisms to convert light energy into chemical energy.
• In photosynthesis plants take CO2 & water, convert it into glucose & O2 in presence of sunlight.

CO2 + H2O + sunlight → C6H12O6 + O2

# Raw materials -

• Carbon dioxide
• Water
• Sunlight

# End products -

• Glucose (starch)
• Oxygen

# Significance of photosynthesis -

• It converts light energy to chemical energy.
• Glucose formed during photosynthesis is stored as starch which other organisms eat for nutrition.
• Photosynthesis decreases CO2 conc in air and increases O2 conc in air.

Thanks dear.