Which is characteristic of an enzyme ?

(1)it is an inorganic catalyst

(2)it destroyed after each chemical reaction

(3)it provides energy for any chemical reaction.

(4)it regulates the rate of a specific chemical reaction

and explain why you pick that answer.

it provides energy for chemical reactions

Explanation:

enzymes are biological catalysts which speeds up a chemical reaction without changing itself.

as like catalysts providing activation energy for the reaction enzymes provides energy for a reaction

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.