Adh requires the presence of a nicotinamide adenine dinucleotide (nad+) molecule in order to catalyze the oxidation of an alcohol. because nad+ is converted to nadh and released, it is a cosubstrate of the reaction, and nadh is a coproduct. additionally, like many enzymes, adh requires a metal cation for catalysis, which in this case is zinc (zn2+). zn2+ is not altered by adh, nor is it tightly bound to the enzyme. which term best describes the role of zn2+ in the reaction catalyzed by adh? prosthetic group cofactor cosubstrate coenzyme

Cofactor

Explanation:

A cofactor is a chemical compound that is not a protein, but it's still essential to the enzyme in order for it to work as a catalyst.

They can be classified into two categories: Small organic molecules (such as vitamins) and metallic ions.

The species Zn⁺² is a metallic ion required by ADH, thus it is a cofactor.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

it would be a gas formation