Question

The time relative to the time required for one reactor volume to pass through the reactor is referred to as ______________

(a) normalized residence time

(b) normalized reactor length

(c) specificity constant

(d) turnover number

I have been asked this question by my school teacher while I was bunking the class.

My question is taken from Immobilized Enzymes topic in portion Immobilized Enzymes and their Uses of Enzyme Technology

Answer 1

Correct answer is (a) normalized residence time

For explanation: The time relative to the time required for one reactor volume to pass through the reactor is referred to as normalized residence time. It is given by trn = tF/V. The normalized reactor length is relative to the length that contains sufficient enzyme to convert all the substrate at the given flow rate if the enzyme acted at its maximum velocity throughout and the actual reactor length necessary for complete conversion. Specificity constant is given by Kcat/Km. The turnover number represents the maximum number of substrate molecules that the enzyme can ‘turn over’ to the product in a set time.