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The ratio of volume of solution contained within the particle to the total volume of the particle is referred to as ____________

(a) tortuosity

(b) porosity

(c) Km

(d) catalytic efficiency

I have been asked this question in class test.

My question comes from Kinetics of Immobilized Enzymes topic in division Immobilized Enzymes Preparation and Kinetics of Enzyme Technology

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Right option is (b) porosity

Easy explanation: The ratio of volume of solution contained within the particle to the total volume of the particle is referred to as porosity. Tortuosity is the average ratio of path length between any points within the particle to their absolute distance apart. Km is defined as the substrate concentration at which the reaction rate is reduced to half. Catalytic efficiency is Kcat/Km.

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