Practice Questions

TLS Online TPP Program

#Question id: 221

Which statement is false about 5,6,7,8-tetrahydrobiopterin?

#Section 2: General Biology

It is required by the enzyme that catalyzes the synthesis of nitric oxide from arginine.
It is synthesized by animals and other organisms.
It is used in the transfer of phosphate groups during DNA synthesis.
It is a reducing agent in the conversion of phenylalanine to tyrosine.

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TLS Online TPP Program

#Question id: 27187

#Section 5: Bioprocess Engineering and Process Biotechnology

A zero order reaction in A has a rate constant of 0.003 molL^-1sec^-1. How long will it take for A’s initial concentration to fall from 0.10 M to 0.075 M?

TLS Online TPP Program

#Question id: 27188

#Section 5: Bioprocess Engineering and Process Biotechnology

k for a zero order reaction is 2×10^-2 mol/L s. If the concentration of the reactant after 25s is 0.5 M. Calculate the initial concentration of the reactant.

TLS Online TPP Program

#Question id: 27189

#Section 5: Bioprocess Engineering and Process Biotechnology

How long will it take for the initial concentration of A to fall from 0.20 M to 0.075, if the rate constant for a reaction of zero-order in A is 0.035 mol L^–1 s^–1.

TLS Online TPP Program

#Question id: 27190

#Section 5: Bioprocess Engineering and Process Biotechnology

A substrate is consumed in a zero order reaction such that the concentration falls from 40 g/l to 20 g/l in 4 h. How long will it take the substrate to fall from 20 g/l to 2 g/l:

TLS Online TPP Program

#Question id: 27191

#Section 5: Bioprocess Engineering and Process Biotechnology

The half-life of a zero order reaction is 30 minutes. What is the concentration of the reactant left after 60 minutes?

TLS Online TPP Program

#Question id: 27192

#Section 5: Bioprocess Engineering and Process Biotechnology

Q) For a single substrate reaction, doubling the substrate concentration increases the rate by 10 fold. The order of the reaction is