Which statement defines a coenzyme? a. An enzyme precursor b. The active part of an enzyme c. An inactive enzyme that becomes functional upon contact with specific cofactors d. An organic molecule closely associated with enzymes e. A unit consisting of an enzyme bound to reactants plus ATP

The correct option is  'c'

Explanation:

Coenzyme are small molecules that are inactive but when it binds with the protein molecule or called the apoenzyme,it form the active enzyme i.e Holoenzyme.

The function of coenzyme is to enhance the activity of enzyme.

They are not capable of catalyze the reaction  ut helps the enzyme to perform the recation by activating it.

Coenzymes are non protein and organic molecule.

Several water soluble vitamins like Vitamin B1,B2 and B6 acts as a coenzyme as they have the properties of coenzyme.

Coenzyme

Explanation:

d. An organic molecule closely associated with enzymes defines a coenzyme

Coenzymes are small molecules,they cannot by themselves catalyze a reaction but they can help enzymes to do so or we can say coenzymes are organic nonprotein molecules that bind with the protein molecule (apoenzyme) to form the active enzyme (holoenzyme)Coenzyme enhances the action of an enzyme (an enzyme is a protein that functions as a catalyst to mediate and speed a chemical reaction)A number of the water-soluble vitamins such as B1, B2 and B6 serve as coenzymes

Nondisjunction in meiosis, occurs during anaphase. When one pair of homologous chromosomes fails to separate. This effects age development and genetic recombination for humans.