MICR 290 Quiz #1 Exam Questions and Correct
Answers | 2026/2027 (Ch. 1,3,4,5,6) || 100% PASS.
Who were the fathers of microbiology and what did they do? correct answers -Antoni van
Leeuwenhoek (dutch): first to make/use simple microbes to discover bacteria
What are Koch's postulates? correct answers 1. microorganism must be found in abundance in all
organisms suffering from disease
2. microorganism must be isolated from diseased organism and grown in pure culture
3. cultured microorganism should cause disease when introduced into healthy organism
4. microorganism must be reisolated from the inoculated, diseased experimental host and
identified as being identical to the original specific causative agent
Leeuwenhoek's micoorganisms grouped into Linnaeus' 6 categories: correct answers -
Prokaryotes: bacteria, archaea, fungi
-Eukaryotes: protozoa, algae/plants, small multicellular animals
What does pathogenic mean? correct answers Causes disease
Protozoa correct answers -single-celled eukaryotes
-similar to animals in their nutritional needs and cellular structure
What does virus (bacteriophage) do? correct answers Injects its DNA to make more viruses
, What did Aristotle propose? correct answers Spontaneous generation: living things can arise
from nonliving matter
-Robert Koch: causative agents of disease and examined colonies of microorganisms (Anthrax:
first disease proven to be bacterial)
-Carolus Linnaeus: Created taxonomic system (grouping similar organisms together -->
eukaryotes and protozoa)
Pasteur's experiments with "swan necked" flasks correct answers 1. infusion is heated (steam
escapes from open end of flask)
2.infusion sits; no microbes appear
(air moves in and out of flask) - (months pass)
3. infusion remains sterile indefinitely
(dust from air settles in bend)
How can we prevent infection and disease? correct answers -Semmelweis and hand washing
(disease puerperal fever)
-Lister's antiseptic technique
-Nightingale and nursing
-Eukaryotes: contain nucleus and membrane bound organelles, large, complex structure,
sexual/nonsexual reproduction
Two types of glycocalyces correct answers 1. Capsule: firmly attached to cell surface, may
prevent bacteria from being recognized by host
Answers | 2026/2027 (Ch. 1,3,4,5,6) || 100% PASS.
Who were the fathers of microbiology and what did they do? correct answers -Antoni van
Leeuwenhoek (dutch): first to make/use simple microbes to discover bacteria
What are Koch's postulates? correct answers 1. microorganism must be found in abundance in all
organisms suffering from disease
2. microorganism must be isolated from diseased organism and grown in pure culture
3. cultured microorganism should cause disease when introduced into healthy organism
4. microorganism must be reisolated from the inoculated, diseased experimental host and
identified as being identical to the original specific causative agent
Leeuwenhoek's micoorganisms grouped into Linnaeus' 6 categories: correct answers -
Prokaryotes: bacteria, archaea, fungi
-Eukaryotes: protozoa, algae/plants, small multicellular animals
What does pathogenic mean? correct answers Causes disease
Protozoa correct answers -single-celled eukaryotes
-similar to animals in their nutritional needs and cellular structure
What does virus (bacteriophage) do? correct answers Injects its DNA to make more viruses
, What did Aristotle propose? correct answers Spontaneous generation: living things can arise
from nonliving matter
-Robert Koch: causative agents of disease and examined colonies of microorganisms (Anthrax:
first disease proven to be bacterial)
-Carolus Linnaeus: Created taxonomic system (grouping similar organisms together -->
eukaryotes and protozoa)
Pasteur's experiments with "swan necked" flasks correct answers 1. infusion is heated (steam
escapes from open end of flask)
2.infusion sits; no microbes appear
(air moves in and out of flask) - (months pass)
3. infusion remains sterile indefinitely
(dust from air settles in bend)
How can we prevent infection and disease? correct answers -Semmelweis and hand washing
(disease puerperal fever)
-Lister's antiseptic technique
-Nightingale and nursing
-Eukaryotes: contain nucleus and membrane bound organelles, large, complex structure,
sexual/nonsexual reproduction
Two types of glycocalyces correct answers 1. Capsule: firmly attached to cell surface, may
prevent bacteria from being recognized by host
