Bacteria
12 practice questionsMicrobiologyStep-by-step solutions
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1
The main structural component of a bacterial cell wall is:
A.Cellulose
B.Chitin
C.Peptidoglycan
D.Keratin
2
Spherical bacteria are described by which shape term?
A.Cocci
B.Bacilli
C.Spirilla
D.Vibrio
3
In the Gram stain, Gram-positive bacteria appear purple because they have:
A.A thin peptidoglycan layer
B.A thick peptidoglycan layer that retains crystal violet
C.No cell wall
D.An outer lipid membrane only
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