Biology
Which one of the following statements regarding haemoglobin is correct?

Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
Haemoglobin is only used for blood clotting and not for carrying gases
Haemoglobin of RBC can carry both oxygen and carbon dioxide
Haemoglobin of RBC can carry only carbon dioxide

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Biology
In Photosynthesis

Chemical energy is converted into electrical energy
Light energy is converted into chemical energy
Light energy is converted into mechanical eneargy
Chemical energy is converted into light energy

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