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Microbiology Lab Final TEST FINAL EXAM AND PRACTICE
EXAM 2026/2027 BANK 2 VERSIONS QUESTIONS WITH
DETAILED VERIFIED ANSWERS / EXAM QUESTIONS WILL
COME FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
Microbes are used to make food, create drugs, and clean up
environmental pollution. - ANSWERS--True
Microbes are found in ____ - ANSWERS--ocean vents
evaporation ponds
thermal pools
Microorganisms produce approximately _____% of the oxygen in our
atmosphere. - ANSWERS--70
Most microbes living on the human body are harmful. - ANSWERS--
False
Microbes can only be observed with a microscope. - ANSWERS--False
_____ contain solid media and are used for the isolation of
miroorgansims grown in the laboratory. - ANSWERS--Plates
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Microbes are responsible for _____. - ANSWERS--oxygen production
the nitrogen cycle
the sulfur cycle
_____ is a product of microbial activity. - ANSWERS--Cheese
Yogurt
Beer
Disease causing microbes make up less than 1% of species growing on
and in the human body. - ANSWERS--True
Gel media allow the size and shape of bacteria colonies to be observed.
- ANSWERS--True
Tryptic soy agar is a type of _____ media used to grow microbes. -
ANSWERS--Solid
Inoculated plates should be incubated in _____. - ANSWERS--a
protected area at room temperature
Bacteria colonies differ by _____. - ANSWERS--color
size
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shape
The inoculation loop must be sterilized _____ when creating a streak
plate. - ANSWERS--between use in each quadrant
Morphology can be used to identify microorganisms with or without
the use of a microscope. - ANSWERS--True
_____ is a rod-shaped bacteria important to the study of genetics and
evolution. - ANSWERS--E. coli
Aseptic technique includes _____ . - ANSWERS--- working quickly and
efficiently around open media containers
- not talking or breathing over open media containers
- washing hands before and after working with media
Tryptic Soy Agar (TSA) is a _____ media. - ANSWERS--general purpose
solid
Streak plating is performed by pouring broth onto agar plates. -
ANSWERS--False
_____ is a common, harmless microbe used in laboratory studies -
ANSWERS--Escherichia coli
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Saccharomyces cerevisiae
Staphylococcus epidermidis
Many types of bacteria have gained resistance to antimicrobials at an
astonishing rate. - ANSWERS--True
Penicillin disrupts the formation of bacterial cell walls by inhibiting the
formation of _____ cross-links. - ANSWERS--peptidoglycan
Novobiocin is a bacteriostatic, narrow-spectrum antibiotic that targets
_____ in some Gram-positive bacteria. - ANSWERS--DNA gyrase
Bacteriostatic antibiotics cause an inhibition of growth rather than cell
lysis and death. - ANSWERS--True
Gentamicin binds with bacterial _____. - ANSWERS--ribosomes
The effective zone of inhibition is the same for all antibiotics. -
ANSWERS--false
An antibiotic is a synthetic drug produced in a laboratory. - ANSWERS--
false
____ is a genus that produces antibiotics. - ANSWERS--Bacillus
Microbiology Lab Final TEST FINAL EXAM AND PRACTICE
EXAM 2026/2027 BANK 2 VERSIONS QUESTIONS WITH
DETAILED VERIFIED ANSWERS / EXAM QUESTIONS WILL
COME FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
Microbes are used to make food, create drugs, and clean up
environmental pollution. - ANSWERS--True
Microbes are found in ____ - ANSWERS--ocean vents
evaporation ponds
thermal pools
Microorganisms produce approximately _____% of the oxygen in our
atmosphere. - ANSWERS--70
Most microbes living on the human body are harmful. - ANSWERS--
False
Microbes can only be observed with a microscope. - ANSWERS--False
_____ contain solid media and are used for the isolation of
miroorgansims grown in the laboratory. - ANSWERS--Plates
,2|Page
Microbes are responsible for _____. - ANSWERS--oxygen production
the nitrogen cycle
the sulfur cycle
_____ is a product of microbial activity. - ANSWERS--Cheese
Yogurt
Beer
Disease causing microbes make up less than 1% of species growing on
and in the human body. - ANSWERS--True
Gel media allow the size and shape of bacteria colonies to be observed.
- ANSWERS--True
Tryptic soy agar is a type of _____ media used to grow microbes. -
ANSWERS--Solid
Inoculated plates should be incubated in _____. - ANSWERS--a
protected area at room temperature
Bacteria colonies differ by _____. - ANSWERS--color
size
,3|Page
shape
The inoculation loop must be sterilized _____ when creating a streak
plate. - ANSWERS--between use in each quadrant
Morphology can be used to identify microorganisms with or without
the use of a microscope. - ANSWERS--True
_____ is a rod-shaped bacteria important to the study of genetics and
evolution. - ANSWERS--E. coli
Aseptic technique includes _____ . - ANSWERS--- working quickly and
efficiently around open media containers
- not talking or breathing over open media containers
- washing hands before and after working with media
Tryptic Soy Agar (TSA) is a _____ media. - ANSWERS--general purpose
solid
Streak plating is performed by pouring broth onto agar plates. -
ANSWERS--False
_____ is a common, harmless microbe used in laboratory studies -
ANSWERS--Escherichia coli
, 4|Page
Saccharomyces cerevisiae
Staphylococcus epidermidis
Many types of bacteria have gained resistance to antimicrobials at an
astonishing rate. - ANSWERS--True
Penicillin disrupts the formation of bacterial cell walls by inhibiting the
formation of _____ cross-links. - ANSWERS--peptidoglycan
Novobiocin is a bacteriostatic, narrow-spectrum antibiotic that targets
_____ in some Gram-positive bacteria. - ANSWERS--DNA gyrase
Bacteriostatic antibiotics cause an inhibition of growth rather than cell
lysis and death. - ANSWERS--True
Gentamicin binds with bacterial _____. - ANSWERS--ribosomes
The effective zone of inhibition is the same for all antibiotics. -
ANSWERS--false
An antibiotic is a synthetic drug produced in a laboratory. - ANSWERS--
false
____ is a genus that produces antibiotics. - ANSWERS--Bacillus
