Question

Look at the graph of reaction rate versus substrate concentration for an enzyme. In which region does the reaction rate remain constant?

Answer 1

The correct answer is C.

Step-by-step explanation:

The reaction speed remains constant in region C. This is because the growth rate decreases, tending to zero. Graphically you can see how the slope of the tangent line approaches the horizontal. The slope of the tangent line represents the rate of reaction speed. It is constant because although the concentration continues to increase, the reaction rate does not vary.

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