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Question

Which among the following is an example of catabolism?
  1. Respiration
  2. Photosynthesis
  3. Glycogenesis
  4. Both b and c 


Solution

The correct option is A Respiration
Catabolism is the process of the breakdown of complex substances into simpler ones and thus releasing energy. In respiration, the carbohydrates (glucose) get broken down releasing energy in the form of ATP.

Anabolism is the process of building up complex organic compounds from simple inorganic compounds utilising energy.

Photosynthesis is an anabolic pathway. In photosynthesis, using CO2 and water, in the presence of sunlight with the help of chlorophyll, green plants are able to synthesize carbohydrates (glucose). During this process energy is utilised.

Glycogenesis is synthesis of glycogen from glucose. It is also an anabolic process. 

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