Vocabulary Drill

Give the best answer to each question. If you choose the wrong answer, you will have an opportunity to try again.

Question 1 of 13.

Biology
A class of molecules that has a “head” with an amine and a carboxylic acid group, and a “tail” that is different for different members of the class.
The study of living organisms.
A prefix meaning “two.”
A substance that increases the rate of a reaction without itself being changed by the reaction.

I don’t know, please tell me.