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
, 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
2. Slime layer: loosely attached to cell surface, important function in biofilms
Flagellation in bacteria correct answers -Atrichous
-Mono-trichous
-Amphitrichous
-Lophotrichous
-Peririchous
Prokaryotes vs. Eukaryotes correct answers -Prokaryotes: lack nucleus and membrane bound
organelles, small, simple structure, binary fission
Function of flagella correct answers Rotation propels bacterium through environment
What is chemotaxis? correct answers When bacteria move in response to stimuli
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
, 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
2. Slime layer: loosely attached to cell surface, important function in biofilms
Flagellation in bacteria correct answers -Atrichous
-Mono-trichous
-Amphitrichous
-Lophotrichous
-Peririchous
Prokaryotes vs. Eukaryotes correct answers -Prokaryotes: lack nucleus and membrane bound
organelles, small, simple structure, binary fission
Function of flagella correct answers Rotation propels bacterium through environment
What is chemotaxis? correct answers When bacteria move in response to stimuli
