a)
Based on the characteristics of the choices listed, which is most likely to be a human pathogen?
Group of answer choices (pick 1)
Thermophile, acidophile, facultative anaerobe
Psychrophile, neutrophile, obligate aerobe
Mesophile, neutrophile, facultative anaerobe
Thermophile, alkaliphile, obligate anaerobe
Mesophile, halophile, microaerophile
b) Streptococcus pyogenes is a gram-positive bacterium. Which of these items would be characteristic of its cell wall?
It has an outer membrane
It has periplasmic space
It contains lipopolysaccharide
It is immunogenic
It lacks permeability