Question

______ acid obtained from the Usnea and Cladonia species is used as an antibiotic against gram positive bacteria.A. Citric
B. HydrochloricC. Usnic
D. Acetic

Answer 1

Usnic acid obtained from the Usnea and Cladonia species is used as an antibiotic against gram-positive bacteria.

Thus from the question, option c. Usnic is the right answer to the question. The others are elements that are derived from other means.

The gram-positive bacteria is a bacteria which can be easily affected by the usnic acid. Thus the usnic acid is used to treat the patients who are suffering from the gram-positive bacterial infection.