Question

which statement most accurately explains how allosteric regulation can change an enzymes catalytic activity? see section 8.4. in allosteric activation, a regulatory molecule binds to the active site, allowing substrate binding. in allosteric activation, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate. in allosteric inhibition, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate. in allosteric inhibition, a regulatory molecule binds to the active site, blocking substrate binding.

Explanation:

Allosteric regulation involves binding at a site other than the active site (allosteric site). In allosteric activation, binding at this site changes the enzyme's shape to allow substrate binding. The first option is wrong as regulatory molecules don't bind to the active site in allosteric activation. The third option is incorrect as allosteric inhibition would not allow substrate binding. The fourth option is wrong because allosteric inhibition doesn't involve binding to the active site (that's competitive inhibition).

Answer:

In allosteric activation, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate.