MolSynapsequestion bank

MolSynapse / Question bank / Surface Chemistry / Catalysis: homogeneous, heterogeneous, enzyme catalysis

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3sc109

Select all correct statements about enzymes.

APepsin works best in strongly acidic medium, as in the stomach.
BHeavy metal ions such as $Hg X^{2 +}$ can inhibit or denature enzymes.
CAn enzyme changes the equilibrium constant of the reaction it catalyses.
DCoenzymes are non-protein organic molecules, often derived from vitamins, that assist enzyme action.

Answer: A, B, D

Pepsin has an optimum near pH 2; heavy metal ions bind to enzymes and deactivate them; coenzymes are organic cofactors. Enzymes, like all catalysts, do not change

K

, so C is false.

Practice Surface Chemistry More on Catalysis: homogeneous, heterogeneous, enzyme catalysis

Previous questionNext question

More questions on Catalysis: homogeneous, heterogeneous, enzyme catalysis

Select the reactions that are autocatalytic. JEE Advanced level
In a run, 0.0200 mmol of catalyst forms 7.50 mmol of product in 25 min. Select all correct statements. JEE Advanced level
For a gas reacting on a solid surface with rate r = (kKP)/(1+KP) and K = 0.50 atm^-1, the apparent order with respect to the gas is n = 1/(1... JEE Advanced level
Catalysts X and Y lower E_a of a reaction from 90 to 60 and 70 kJ mol^-1 respectively, with equal pre-exponential factors. Take R = 8.314 J ... JEE Advanced level