Identify the correct statement regarding enzymes.

What is the substance upon which an enzyme acts called?

Arrange the steps of the biochemical reaction in sequence:
$I -$ Diffusion of the substrate towards the active site of the enzyme
$II -$ Formation of the transition state structure
$III -$ Release of the product from the active site
$IV -$ Breaking or formation of bonds

Assertion : Allosteric enzymes show feedback inhibition.
Reason : The inhibitor is competitive.

The following statements are the steps in the catalytic action of an enzyme. Arrange them in the correct sequence.
a) The active site of the enzyme, now in close proximity of the substrate, breaks the chemical bonds of the substrate and a new enzyme-product complex is formed.
b) The substrate binds to the enzyme, inducing a change in the active site of the enzyme.
c) The enzyme releases the products of the reaction and the free enzyme is ready to bind to another molecule of the substrate.
d) The substrate binds to the active site of the enzyme.

Which of the following enzymes becomes active in the presence of lipids?