An Antibiotic Made by Microorganisms and Modified by Chemists Is

Question

An antibiotic made by microorganisms and modified by chemists is called
A)anti-metabolic.
B)catabolic.
C)synthetic.
D)semi-synthetic.

Accepted Answer

A semi-synthetic antibiotic is made from a naturally occurring antibiotic produced by microorganisms, which is then modified chemically to enhance its effectiveness or alter its spectrum of activity.