MICRO FINAL EXAM NEWEST 2026/2027 QUESTIONS
and CORRECT DETAILED ANSWERS ALREADY
GRADED A+
Peptidoglycan is a unique macromolecule found in bacterial
a. cell membranes.
b. cell walls.
c. capsules.
d. slime layers.
e. inclusions. - CORRECT ANSWER-b. cell walls.
Which of the following species of bacteria is not closely related to the others?
a. Escherichia coli
b. Staphylococcus aureus
c. Staphylococcus saprophyticus
d. Staphylococcus capitis
e. Staphylococcus epidermidis - CORRECT ANSWER-a. Escherichia coli
Lysozyme is most effective against
,a. gram-negative organisms.
b. gram-positive organisms.
c. cyanobacteria.
d. mycoplasmas.
e. archea. - CORRECT ANSWER-b. gram-positive organisms.
Lipopolysaccharide is an important cell wall component of
a. mycoplasmas.
b. gram-positive bacteria.
c. gram-negative bacteria.
d. acid-fast bacteria.
e. protoplasts. - CORRECT ANSWER-c. gram-negative bacteria.
_____ Manual of Systematic Bacteriology is a manual of bacterial descriptions and
classifications.
a. Pasteur's
b. Leeuwenhoek's
c. Bergey's
d. Koch's
,e. Lister's - CORRECT ANSWER-c. Bergey's
Halobacterium salinarium lives in and requires salt. This is an example of an
archaeabacterium described as a(n) __.
a. thermophile
b. osmophile
c. methanogen
d. psychrophile
e. halophile - CORRECT ANSWER-e. halophile
Which of the following does not pertain to endotoxin?
a. is a specific cell wall lipid
b. can cause septic shock in the human body
c. is involved in typhoid fever and some meningitis cases
d. is found in acid-fast bacterial cell walls
e. can stimulate fever in the human body - CORRECT ANSWER-d. is found in
acid-fast bacterial cell walls
Explain the theory of Spontaneous Generation and then explain how Louis
Pasteur designed an experiment to disprove it. - CORRECT ANSWER-
, Spontaneous Generation is the theory of abiogenesis; this is where life comes
from somewhere where life didn't exist. Louis Pasteur disproved the theory that
life comes from somewhere where life didn't exist by trying to grow microbes in a
closed swan neck flask. When microbes didn't grow for a year he then broke the
flask and within a day there were microbes in the flask proving that microbes
could only come from where microbes were before.
Which of the following is mismatched?
a. inclusions - excess cell nutrients and materials
b. nucleoid - hereditary material
c. ribosomes - protein synthesis
d. plasmids - genes essential for growth and metabolism
e. cytoplasm - dense, gelatinous solution - CORRECT ANSWER-d. plasmids -
genes essential for growth and metabolism
The difference in cell wall structure of Mycobacterium and Nocardia compared to
the typical gram-positive bacterial cell wall structure is
a. predominance of unique, waxy lipids.
b. easily decolorized.
c. more peptidoglycan.
d. All of the choices are correct.
and CORRECT DETAILED ANSWERS ALREADY
GRADED A+
Peptidoglycan is a unique macromolecule found in bacterial
a. cell membranes.
b. cell walls.
c. capsules.
d. slime layers.
e. inclusions. - CORRECT ANSWER-b. cell walls.
Which of the following species of bacteria is not closely related to the others?
a. Escherichia coli
b. Staphylococcus aureus
c. Staphylococcus saprophyticus
d. Staphylococcus capitis
e. Staphylococcus epidermidis - CORRECT ANSWER-a. Escherichia coli
Lysozyme is most effective against
,a. gram-negative organisms.
b. gram-positive organisms.
c. cyanobacteria.
d. mycoplasmas.
e. archea. - CORRECT ANSWER-b. gram-positive organisms.
Lipopolysaccharide is an important cell wall component of
a. mycoplasmas.
b. gram-positive bacteria.
c. gram-negative bacteria.
d. acid-fast bacteria.
e. protoplasts. - CORRECT ANSWER-c. gram-negative bacteria.
_____ Manual of Systematic Bacteriology is a manual of bacterial descriptions and
classifications.
a. Pasteur's
b. Leeuwenhoek's
c. Bergey's
d. Koch's
,e. Lister's - CORRECT ANSWER-c. Bergey's
Halobacterium salinarium lives in and requires salt. This is an example of an
archaeabacterium described as a(n) __.
a. thermophile
b. osmophile
c. methanogen
d. psychrophile
e. halophile - CORRECT ANSWER-e. halophile
Which of the following does not pertain to endotoxin?
a. is a specific cell wall lipid
b. can cause septic shock in the human body
c. is involved in typhoid fever and some meningitis cases
d. is found in acid-fast bacterial cell walls
e. can stimulate fever in the human body - CORRECT ANSWER-d. is found in
acid-fast bacterial cell walls
Explain the theory of Spontaneous Generation and then explain how Louis
Pasteur designed an experiment to disprove it. - CORRECT ANSWER-
, Spontaneous Generation is the theory of abiogenesis; this is where life comes
from somewhere where life didn't exist. Louis Pasteur disproved the theory that
life comes from somewhere where life didn't exist by trying to grow microbes in a
closed swan neck flask. When microbes didn't grow for a year he then broke the
flask and within a day there were microbes in the flask proving that microbes
could only come from where microbes were before.
Which of the following is mismatched?
a. inclusions - excess cell nutrients and materials
b. nucleoid - hereditary material
c. ribosomes - protein synthesis
d. plasmids - genes essential for growth and metabolism
e. cytoplasm - dense, gelatinous solution - CORRECT ANSWER-d. plasmids -
genes essential for growth and metabolism
The difference in cell wall structure of Mycobacterium and Nocardia compared to
the typical gram-positive bacterial cell wall structure is
a. predominance of unique, waxy lipids.
b. easily decolorized.
c. more peptidoglycan.
d. All of the choices are correct.
