AP Biologymediummcq1 pt
Increasing substrate concentration from very low levels increases reaction rate because
A.more active sites become occupied
B.the enzyme count increases
C.the temperature rises
D.activation energy drops
Explanation
Core Concept
At low substrate, enzymes wait idle; adding substrate fills sites and raises rate until saturation. This is the rising part of the Michaelis–Menten curve.
Correct Answer
Amore active sites become occupied
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