MICROBIOLOGY 2420 EXAM 3 REVIEW (QUESTIONS AND ANSWERS ) 2025/2026 RATED 100% CORRECT!!

MICROBIOLOGY 2420 EXAM 3 REVIEW (QUESTIONS
AND ANSWERS ) 2025/2026 RATED 100% CORRECT!!




Which one of the following microorganisms was once called blue-green algae?


Mycoplasmas
Cyanobacteria
Chlamydiae
Rickettsia Answer - Cyanobacteria


Which one of the following is a prokaryote without a cell wall?


Mycoplasmas
Virus
Rickettsia
Cyanobacterium Answer - Mycoplasmas


Which one of the following microorganisms has its own kingdom in the five-
kingdom of classification?


Viruses
Algae
Bacteria

,Fungi Answer - Fungi


All of the following are considered eukaryotes except:


Archea
Fungi
Protozoa
Humans Answer - -Archea


The binomial name of a microbe is composed of its _____.


kingdom and genus names
genus name and a species modifier
family and class names
genus and family names Answer - -Genus name and species modifier


The science of classification is generally known as _____.


nomenclature
taxonomy
morphology
dichotomy Answer - -Taxonomy


Classification is necessary to ______.


establish criteria for identifying organisms

, arrange related organisms into groups


provide information on how organisms evolved


All of the above Answer - -All of the above


In the name Escherichia coli, Escherichia refers to the ________ of the bacteria.


class
phylum
species
genus Answer - -Genus


Which of the following organisms shows the proper use of binomial
nomenclature?


escherichia coli
Escherichia Coli
Escherichia coli
escherichia Coli Answer - -Excherichia coli - Capital letter Genus and small
capital species


Which of the following levels of classification would contain the greatest
number of organisms?


Phylum