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 tumover 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 Enzyme Substrate Turnover Number (per second) Ribonuclease Fumarase Lactate Dehydrogenase Urease RNA Fumarate Lactate 100 800 1000 Urea 10,000 How many molecules of lactate can one molecule of lactate dehydrogenase act on in 21 minutes? Number molecules

Explanation / Answer

The number of molecules one molecule oflactate dehydrogenase act on 21 minutes = 1000 * 21* 60

= 1,260,000 molecules

Therefore '1,260,000 molecules' is the answer for this question.

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