One way of expressing the rate at which an enzyme can catalyze a reaction is to

Question

One way of expressing the rate at which an enzyme can catalyze a reaction is to give its turnover number. The turnover number is the maximum number of substrate molecules that can be acted on by one molecule of enzyme per unit of time. The following table gives the turnover number of some representative enzymes.

Substrate Tu RNA Fumarate Lactate Enzyme SubstrateTurmover Number (per second) Ribonuclease Fumarase Lactate Dehydrogenase Urease 100 800 1000 Urea 10,000 How many molecules of RNA can one molecule of ribonuclease act on in 17 minutes? Number molecules

Explanation / Answer

In 1 second ribonuclease can act on 100 RNA molecule

In 17 minutes it will act on 100×60×17=102000 molecules

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