Microbiology 555 The prokaryotes Study Guide Test.
1) Which of the following are found primarily in the intestines of humans?
A) Gram-negative
... [Show More] aerobic rods and cocci
B) Aerobic, helical bacteria
C) Facultatively anaerobic gram-negative rods
D) Gram-positive cocci
E) None of the above - CORRECT ANSWER C) Facultatively anaerobic gram-negative rods
2) Which of the following is a characteristic of Clostridium?
A) Endospore-forming cocci
B) Mycobacteria
C) Gram-negative aerobic cocci
D) Anaerobic gram-negative rods
E) None of the above - CORRECT ANSWER A) Endospore-forming cocci
3) Which of the following is not a characteristic of the regular, nonsporing gram-positive rods?
A) Aerotolerant
B) Fermentative metabolism
C) Donʹt produce endospores
D) Nonpathogenic
E) None of the above - CORRECT ANSWER D) Nonpathogenic
4) Which of the following is not a characteristic of Neisseria?
A) Requires X and V factors
B) Cocci
C) Gram-negative
D) Oxidase-positive
E) None of the above - CORRECT ANSWER A) Requires X and V factors
5) Staphylococcus and Streptococcus can be easily differentiated in a laboratory by which one of the
following?
A) Cell shape
B) Gram stain reaction
C) Growth in high salt concentrations
D) Ability to cause disease
E) None of the above - CORRECT ANSWER C) Growth in high salt concentrations
6) Which of the following genera is an anaerobic gram-negative rod?
A) Escherichia
B) Staphylococcus
C) Bacteroides
D) Treponema
E) None of the above - CORRECT ANSWER C) Bacteroides
7) Which of the following do you expect to be most resistant to high temperatures?
A) Bacillus subtilis
B) Eschericia coli
C) Neisseria gonorrhoeae
D) Staphylococcus aureus
E) Streptococcocus pyogenes - CORRECT ANSWER A) Bacillus subtilis
8) Which of the following is not an enteric?
A) Salmonella
B) Shigella
C) Escherichia
D) Enterobacter
E) Campylobacter - CORRECT ANSWER E) Campylobacter
9) Which of the following is not a characteristic of spirochetes?
A) Possess an axial filament
B) Gram-negative
C) Helical shape
D) Easily observed with brightfield microscopy
E) Difficult to culture in vitro - CORRECT ANSWER D) Easily observed with brightfield microscopy
10) You have isolated a bacterium that grows in a medium containing an organic substrate and
nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. This bacterium is
A) Gram-negative.
B) Using anaerobic respiration.
C) A chemoautotroph.
D) A photoautotroph.
E) A photoheterotroph. - CORRECT ANSWER B) Using anaerobic respiration.
11) Which of the following lacks a cell wall?
A) Borrelia
B) Mycoplasma
C) Mycobacterium
D) Clostridium
E) Nocardia - CORRECT ANSWER B) Mycoplasma
12) Which of the following is not gram-positive?
A) Treponema
B) Corynebacterium [Show Less]