Microbiology Exam 1 Questions with
correct verified detailed Answers latest
updated version 2025
What is the correct sequence for a Gram stain?
Safranin, Crystal Violet, Gram's iodine, Alcohol
Crystal Violet, Safranin, Alcohol, Gram's iodine
Alcohol, Crystal Violet, Safranin, Gram's iodine
Crystal Violet, Gram's iodine, Alcohol, Safranin
Gram's Iodine, Crystal Violet, Alcohol, Safranin --- correct precise
answer ---Crystal Violet, Gram's iodine, Alcohol, Safranin
Peptidoglycan is a unique macromolecule found in bacterial
cell membranes
capsules
slime layers
cell walls
inclusions --- correct precise answer ---cell walls
,Lysozyme, an enzyme found in tears, provides a natural defense
against bacteria by
removing flagella.
removing the capsule from outside the cell.
hydrolyzing peptidoglycan in cell walls.
dissolving the cell membrane.
inhibiting protein synthesis. --- correct precise answer ---hydrolyzing
the peptidoglycan in cell walls
Bacteria with small bunches of flagella emerging from the same site
are said to be
peritrichous.
amphitrichous.
lophotrichous.
monotrichous.
spirilla. --- correct precise answer ---lophotrichous
The most immediate result of destruction of a cell's ribosomes would
be
destruction of the cell's DNA.
material would not be able to cross the cell membrane.
,loss of capsule.
protein synthesis would stop.
formation of glycogen inclusions. --- correct precise answer ---protein
synthesis would stop.
Which of the following, pertaining to prokaryotic cell membranes, is
mismatched?
sterols present - mycoplasmas
unique hydrocarbon present - cyanobacteria
function - regulates transport of nutrients and wastes
internal folds - mesosomes
form a bilayer - phospholipids --- correct precise answer ---unique
hydrocarbon present - cyanobacteria
In the Gram stain, the mordant is
Safranin.
Crystal Violet.
Water.
Iodine.
Alcohol. --- correct precise answer ---Iodine.
, Endospores are
metabolically inactive.
resistant to heat and chemical destruction.
resistant to destruction by radiation.
living structures.
All of the choices are correct. --- correct precise answer ---All of the
choices are correct.
The site/s for most ATP synthesis in prokaryotic cells is/are the
cell membrane.
inclusions.
cell wall.
ribosomes.
mitochondria. --- correct precise answer ---cell membrane.
The transfer of genes during bacterial conjugation involves rigid,
tubular appendages called
periplasmic flagella (axial filaments).
fimbriae.
sex pili.
flagella.
correct verified detailed Answers latest
updated version 2025
What is the correct sequence for a Gram stain?
Safranin, Crystal Violet, Gram's iodine, Alcohol
Crystal Violet, Safranin, Alcohol, Gram's iodine
Alcohol, Crystal Violet, Safranin, Gram's iodine
Crystal Violet, Gram's iodine, Alcohol, Safranin
Gram's Iodine, Crystal Violet, Alcohol, Safranin --- correct precise
answer ---Crystal Violet, Gram's iodine, Alcohol, Safranin
Peptidoglycan is a unique macromolecule found in bacterial
cell membranes
capsules
slime layers
cell walls
inclusions --- correct precise answer ---cell walls
,Lysozyme, an enzyme found in tears, provides a natural defense
against bacteria by
removing flagella.
removing the capsule from outside the cell.
hydrolyzing peptidoglycan in cell walls.
dissolving the cell membrane.
inhibiting protein synthesis. --- correct precise answer ---hydrolyzing
the peptidoglycan in cell walls
Bacteria with small bunches of flagella emerging from the same site
are said to be
peritrichous.
amphitrichous.
lophotrichous.
monotrichous.
spirilla. --- correct precise answer ---lophotrichous
The most immediate result of destruction of a cell's ribosomes would
be
destruction of the cell's DNA.
material would not be able to cross the cell membrane.
,loss of capsule.
protein synthesis would stop.
formation of glycogen inclusions. --- correct precise answer ---protein
synthesis would stop.
Which of the following, pertaining to prokaryotic cell membranes, is
mismatched?
sterols present - mycoplasmas
unique hydrocarbon present - cyanobacteria
function - regulates transport of nutrients and wastes
internal folds - mesosomes
form a bilayer - phospholipids --- correct precise answer ---unique
hydrocarbon present - cyanobacteria
In the Gram stain, the mordant is
Safranin.
Crystal Violet.
Water.
Iodine.
Alcohol. --- correct precise answer ---Iodine.
, Endospores are
metabolically inactive.
resistant to heat and chemical destruction.
resistant to destruction by radiation.
living structures.
All of the choices are correct. --- correct precise answer ---All of the
choices are correct.
The site/s for most ATP synthesis in prokaryotic cells is/are the
cell membrane.
inclusions.
cell wall.
ribosomes.
mitochondria. --- correct precise answer ---cell membrane.
The transfer of genes during bacterial conjugation involves rigid,
tubular appendages called
periplasmic flagella (axial filaments).
fimbriae.
sex pili.
flagella.
