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a. Is composed of NAM and NAG linked by a beta 1,6 bond
b. Is composed of NAM and NAG linked by a beta 1,4 bond
c. is composed of NAM and NAG linked by a alpha 1,4 bond
d. Is composed of NAM and NAR linked by a beta 1,4 bond
Iodine is used in the Gram stain to:
a. To displace crystal violet from Gram negative cells
b. To remove layers covering the peptidoglycan
c. Stain cells pink
d. Because it forms complexes with crystal violet
Peptidoglycan chains are crosslinked:
a. Through the action of a transpeptidase joining peptides that are covalently linked to NAM.
b. Through the action of a transpeptidase joining peptides that are covalently linked to either c.
of the sugars.
c. Through peptide chains joined by a translocase.
d. Directly through glycosidic bonds.
What does the name Streptococcus pyogenes tell us about this bacterium?
a. It is a string of spherical bacteria and it causes pus to be made.
b. t is a string of rod-shaped bacteria and it causes pus to made.
c. It is a string of spherical bacteria and it causes a very high temperature.
d. It is a clump of spherical bacteria and it causes pus to made.
Movement toward or away from a chemical stimulus is known as...
a. Phototaxis
b. Aerotaxis
c. Magnetotaxis
d. Chemotaxis
Which of the following has a coccobacillus morphology?
a. Streptobacillus monoliformis
b. Yersinia pestis
c. Bacillus subtilis
d. Escherichia coli
Eukaryotic cells roughly how many times larger than bacteria?
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