Question

what is photosynthesis​

Answer 1

Explanation:

Photo :- light

Synthesis :- To prepare

The process by which plants make their own food in presence of sunlight is called photosynthesis .

The reaction of photosynthesis :-

6CO2 + 6H2O + Light energy → C6H12O6 (sugar) + 6O2

Process of photosynthesis :-

Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centres 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.

In plants, algae and cyanobacteria, long-term energy storage in the form of sugars is produced by a subsequent sequence of light-independent reactions called the Calvin cycle; some bacteria use different mechanisms, such as the reverse Krebs cycle, to achieve the same end. In the Calvin cycle, atmospheric carbon dioxide is incorporated into already existing organic carbon compounds, such as ribulose bisphosphate (RuBP).[5] Using the ATP and NADPH produced by the light-dependent reactions, the resulting compounds are then reduced and removed to form further carbohydrates, such as glucose.

Answer 2

PHOTOSYNTHESIS

• It is a process by which plants make their own food.

• It is an endothermic process.

• It is a chemical process in which plants convert light energy into chemical energy.

• This process converts water and carbon dioxide into oxygen and energy-rich organic compounds.

EQUATION :-

(sunlight energy)

6CO2 + 6H2O -------------------------------> C6H12O6 + 6O2

Carbon dioxide and water in the presence of energy produces glucose and oxygen.

STEPS INVOLVED :- This process takes place in the leaves of the plants. Inside leaves there are tiny structures called chloroplasts which further contains a green pigment called chlorophyll.

1. Water is absorbed by the roots and carbon dioxide enters through stomata.
2. Chlorophyll absorbs the energy from the sun to split water molecules into hydrogen and oxygen.
3. After the separation of molecules, hydrogen separated from water and carbon dioxide are used together for the production of glucose and oxygen is released in the atmosphere as a waste product.

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