The modern antibiotic revolution began with the discovery of which antibiotic?
sulfanamide
quinoline
tetracycline
penicillin
acyclovir
Hopanoids found in sedimentary rock are an example of a
biosignature.
microfossil.
stromatolite.
banded iron formation.
prebiotic metabolite.
Which of the following is an opportunistic mycosis?
blastomycosis
histoplasmosis
candidiasis
paracoccidioidomycosis
coccidioidomycosis
Which of the following can only be used as a topical antibiotic?
streptogramin A
vancomycin
gramicidin
amphotericin B
chloramphenicol
Which of the following does not represent evidence of an RNA world?
riboswitches
NADH
RNA viruses
repressors
ribozymes