The peptidoglycan structural subunit:
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?
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?
