BIOL 3201 lab Final Exam and All
Correct Answers 2026/2027 Update.
false - Answer Microorganisms are normally found in a person's cerebrospinal fluid. (true or
false)
true - Answer Microbes are in the water we drink.
aseptic technique - Answer Taking precautions to prevent the contamination of others,
yourself, your surroundings, and your lab supplies is known as...
flaming them - Answer Loops and needles are sterilized by...
microorganisms are everywhere - Answer "Ubiquity of microorganisms" means...
discard cart - Answer Test tubes are disposed of in/on the....
bsl 4 - Answer Biosafety level designation used to describe microorganisms that are dangerous
and exotic with high risk of aerosol transmitted infections. Rarely are there treatments or
vaccines for these microorganisms, and the diseases they cause are frequently fatal.
leave it on the counter - Answer When inoculating a Petri plate, what do you do with the lid of
the plate?
bsl 3 - Answer Lab coats, gloves, and respirators must be worn as personal protective
equipment (PPE) in this type of lab.
condenser - Answer Collects and directs the light from the light source to the slide and is
located under the stage of a microscope.
oculars, objectives, condenser - Answer Brightfield microscopes have three lens systems:....
40x and 100x - Answer When focusing the ___ objective(s), you only adjust the fine focus
adjustment/knob.
ethanol - Answer Decolorizer for Gram stain.
, lens wipes - Answer You use ____ to clean the oculars, objectives, and stage of a microscope.
methylene blue - Answer Simple staining uses
diaphragm - Answer On a microscope, the amount of light that reaches the slide is controlled
by a _________ located inside the condenser.
safranin - Answer Counter stain for Gram stain.
pink - Answer gram negative bacteria are what color
purple - Answer gram positive bacteria are what color
yellow - Answer If an organism can ferment the carbohydrate in a phenol red carbohydrate
tube, the liquid in the tube will turn....
differential medium - Answer A/an _______ medium contains substances that cause some
bacteria to take on an appearance that distinguishes it from other bacteria.
grams iodine - Answer After incubation, _____ is added to the starch plate to detect starch
hydrolysis.
red to yellow - Answer When carbohydrates are fermented in the presence of phenol red (for
example in a Phenol red glucose tube) the liquid's color changes from ___ to ____.
hydrogen peroxide - Answer Reagent used to test for catalase enzyme.
acid - Answer In a phenol red carbohydrate tube, the presence of ____ is indicated by a color
change of the pH indicator phenol red.
blood plasma - Answer The reagent used in the coagulase test is
iodine - Answer Reagent used with starch hydrolysis.
beta - Answer The complete lysis of red blood cells around a colony of bacteria.
sba plate - Answer Hemolytic capability of an organism can be demonstrated on...
Correct Answers 2026/2027 Update.
false - Answer Microorganisms are normally found in a person's cerebrospinal fluid. (true or
false)
true - Answer Microbes are in the water we drink.
aseptic technique - Answer Taking precautions to prevent the contamination of others,
yourself, your surroundings, and your lab supplies is known as...
flaming them - Answer Loops and needles are sterilized by...
microorganisms are everywhere - Answer "Ubiquity of microorganisms" means...
discard cart - Answer Test tubes are disposed of in/on the....
bsl 4 - Answer Biosafety level designation used to describe microorganisms that are dangerous
and exotic with high risk of aerosol transmitted infections. Rarely are there treatments or
vaccines for these microorganisms, and the diseases they cause are frequently fatal.
leave it on the counter - Answer When inoculating a Petri plate, what do you do with the lid of
the plate?
bsl 3 - Answer Lab coats, gloves, and respirators must be worn as personal protective
equipment (PPE) in this type of lab.
condenser - Answer Collects and directs the light from the light source to the slide and is
located under the stage of a microscope.
oculars, objectives, condenser - Answer Brightfield microscopes have three lens systems:....
40x and 100x - Answer When focusing the ___ objective(s), you only adjust the fine focus
adjustment/knob.
ethanol - Answer Decolorizer for Gram stain.
, lens wipes - Answer You use ____ to clean the oculars, objectives, and stage of a microscope.
methylene blue - Answer Simple staining uses
diaphragm - Answer On a microscope, the amount of light that reaches the slide is controlled
by a _________ located inside the condenser.
safranin - Answer Counter stain for Gram stain.
pink - Answer gram negative bacteria are what color
purple - Answer gram positive bacteria are what color
yellow - Answer If an organism can ferment the carbohydrate in a phenol red carbohydrate
tube, the liquid in the tube will turn....
differential medium - Answer A/an _______ medium contains substances that cause some
bacteria to take on an appearance that distinguishes it from other bacteria.
grams iodine - Answer After incubation, _____ is added to the starch plate to detect starch
hydrolysis.
red to yellow - Answer When carbohydrates are fermented in the presence of phenol red (for
example in a Phenol red glucose tube) the liquid's color changes from ___ to ____.
hydrogen peroxide - Answer Reagent used to test for catalase enzyme.
acid - Answer In a phenol red carbohydrate tube, the presence of ____ is indicated by a color
change of the pH indicator phenol red.
blood plasma - Answer The reagent used in the coagulase test is
iodine - Answer Reagent used with starch hydrolysis.
beta - Answer The complete lysis of red blood cells around a colony of bacteria.
sba plate - Answer Hemolytic capability of an organism can be demonstrated on...
