A scientist discovers that a soil bacterium he has been studying produces an antimicrobial that kills gram-negative bacteria. Sh
e isolates and purifies the antimicrobial compound, then chemically converts a chemical side chain to a hydroxyl group. When she tests the antimicrobial properties of this new version, she finds that this antimicrobial drug can now also kill gram-positive bacteria. The new antimicrobial drug with broad-spectrum activity is considered to be which of the following? resistant
semisynthetic
synthetic
natural
Broad spectrum antibacterials are active against the Gram-negative and Gram-positive organisms.
For example phenicols, tetracyclines .
Semisynthetic drugs -
As known as the partial chemical synthesis , it is a type of chemical synthesis that uses chemical compounds which are isolated from any natural source .
Semisynthesis is a cheaper method , as the initial substance is extracted from nature and rest few steps require chemical , which make it cheap and quicker process of drug synthesis .
