Explain the following: (i) There will be no life without photosynth

1.	Explain the following: (i) There will be no life without photosynthesis. (ii) There is no oxygen evolution in bacterial photosynthesis. (iii) Chlorophyll a is an essential photosynthetic pigment.
Answer» (i) For existence of life, food and O₂ are very essential. Photosynthesis is the only process which can trap solar energy and can synthesis food for own and all other organisms. During photosynthesis, O₂ is given out and CO₂ is taken. So, it keeps balance of O₂ and CO₂ in nature. Thus, photosynthesis is essential for existence of life. (ii) In bacterial photosynthesis, the raw material of the supply of proton (H⁺) is H₂S. than H₂O. Thus, there is production of Sulphur and not oxygen. (iii) Chlorophyll-b and other pigments of a reaction centre or photosystem absorb solar energy and transfer it to chlorophyll-a. Ultimately it is the chlorophylI-a that initiates the photosynthesis process.

Explain the following: (i) There will be no life without photosynthesis. (ii) There is no oxygen evolution in bacterial photosynthesis. (iii) Chlorophyll a is an essential photosynthetic pigment.

Answer»

(i) For existence of life, food and O₂ are very essential. Photosynthesis is the only process which can trap solar energy and can synthesis food for own and all other organisms. During photosynthesis, O₂ is given out and CO₂ is taken. So, it keeps balance of O₂ and CO₂ in nature. Thus, photosynthesis is essential for existence of life.

(ii) In bacterial photosynthesis, the raw material of the supply of proton (H⁺) is H₂S. than H₂O. Thus, there is production of Sulphur and not oxygen.

(iii) Chlorophyll-b and other pigments of a reaction centre or photosystem absorb solar energy and transfer it to chlorophyll-a. Ultimately it is the chlorophylI-a that initiates the photosynthesis process.

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