One way of expressing the rate at which an enzyme can catalyze a reaction is to state 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 table gives the turnover number of four representative enzymes. Enzyme Ribonuclease Substrate Turnover number (per second) RNA 100 Fumarase fumarate 800 Lactate dehydrogenase lactate 1000 Urease urea 10,000 How many molecules of fumarate can one molecule of fumarase act on in 12.4 min? fumarate molecules:

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One way of expressing the rate at which an enzyme can catalyze a reaction is to state 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 table
gives the turnover number of four representative enzymes.
Enzyme
Ribonuclease
Substrate
Turnover number (per second)
RNA
100
Fumarase
fumarate
800
Lactate dehydrogenase
lactate
1000
Urease
urea
10,000
How many molecules of fumarate can one molecule of fumarase act on in 12.4 min?
fumarate molecules:
Transcribed Image Text:One way of expressing the rate at which an enzyme can catalyze a reaction is to state 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 table gives the turnover number of four representative enzymes. Enzyme Ribonuclease Substrate Turnover number (per second) RNA 100 Fumarase fumarate 800 Lactate dehydrogenase lactate 1000 Urease urea 10,000 How many molecules of fumarate can one molecule of fumarase act on in 12.4 min? fumarate molecules:
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