Question

What is an antibiotic?A. a chemical substance produced by microorganisms that helps the growth of other microorganismsB. a chemical substance produced by microorganisms that inhibits the growth of or kills other microorganismsC. a naturally occurring substance produced by microorganisms that helps the growth of other microorganismsD. a naturally occurring substance produced by microorganisms that inhibits the growth of or kills other microorganisms

Answer 1

Antibiotics are substances that inhibit the growth of other organisms, such as bacteria, but also our very own cells. These molecules are naturally produced by fungi and were discovered by Fleming in 1928. The answer option that better describes this is the last one: "D. a naturally occurring substance produced by microorganisms that inhibits the growth of or kills other microorganisms".