Below the optimum, raising the temperature of an enzyme controlled reaction from 15 to 25 degrees Celsius will roughly

  • A. halve the rate
  • B. stop the reaction
  • C. have no effect on the rate
  • D. double the rate

Explanation

Each 10 degree rise roughly doubles the rate because molecules collide more often and with more energy, until heat damage overtakes this gain near the optimum. Above the optimum the curve falls steeply as the enzyme denatures.

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