Question

how concentration of product always kept within certain range ?

Answer 1

In order to keep the concentration of a product within a certain range all the time it must be checked or monitored all the time constantly so that if there is any deviation in range it should be corrected immediately.
Feedback mechanism is also helpful to keep a check and balance in order to maintain range of the products so that any deflection must be corrected at the spot.

Answer 2

The concentration of the product can always be kept within a certain range using a method called Feedback Inhibition

In the field of enzyme biology, feedback inhibition is the suppression of an enzyme's activity by a byproduct of a series of reactions that results in the synthesis of a chemical.

The production of the product is reduced when an enzyme involved in its synthesis is inhibited when it builds up in a cell over the appropriate level.

The inhibition is relieved and the product creation resumes once the product has been consumed or broken down, lowering its concentration. These enzymes are referred to as being under allosteric control if the capacity to catalyze a reaction depends on molecules other than their substrates (the molecules on which they act to generate a product).

A mechanism through which the concentration of specific cell components is reduced is known as feedback inhibition

The given answer is in terms of biology

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