Question

QUESTION 4 Enzyme Z's catalytic power is provided through a transitory covalent linkage between one of the substrates and the side- chain of a residue in the enzyme, creation of "tunnels" through which substrates can travel toward one another, stabilization of the transition state, and temporary donations of protons from the enzyme to the transition state. This enzyme is operating through O a. chemical catalysis O b. both binding-mode and chemical catalysis O c. neither binding-mode nor chemical catalysis d. binding-mode catalysis

Answer 1

Both binding mode and chemical catalysis

During covalent catalysis ( a concept under chemical catalysis), the substrate forms a temporary (transient) covalent bond with residues present in the active site of the enzyme and facilitates the decrease in energy of the later transitional states of the chemical reaction.

Binding mode catalysis works through proximity effect and transition state stabilization.