4. Assertion (A) : Cellular respiration takes place in cells of all living organisms.
Reason (R) The process of breakdown of food in the cell with the release of energy is
called cellular respiration.
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A. Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals. Cellular respiration begins in the cytoplasm of cells. It is completed in mitochondria.
R. The source of the energy required to regenerate ATP is the chemical energy stored in food (e.g. glucose). The cellular process of releasing energy from food through a series of enzyme-controlled reactions is called respiration . Some of the energy released is used to produce ATP.
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