Why are enzymes considered catalysts

enzymes are organic catalyst, the speed up the rate of biochemical processes

Explanation:

enzymes are protein in nature

enzymes are not consumed during the biochemical reaction

enzymes are specific in action

they require optimal temperature for their action.

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only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.