The most likely effect on cellular respiration when a plant loses much of its chlorophyll will be very less production of energy.
Cellular respiration is the process of deriving energy (mainly in the form of ATP) from the nutrients that one organism produces or consumes. In case of plants, they derive nutrition by the process of photosynthesis. Chlorophyll is an essential pigment responsible for producing food by performing photosynthesis for the plants.
Therefore, if the chlorophyll content is reduced in plants, they will produce less food, that will eventually lead to less production of energy, i.e. cellular respiration performed will be less.
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