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BIO 320 Exam 1 Quiz Questions and Answers UPDATED 2025

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  • BIO 320

Which of the following is a proper scientific name? Gram positive streptococcus Staphylococcus Streptococcus pyogenes Anthrax Streptobacilli -Correct Answer Streptococcus pyogenes Which of the following microbe groups possess eukaryotic cell structure? Indicate all that apply. protozoa vi...

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  • March 25, 2025
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BIO 320 Exam 1 Quiz Questions and
Answers UPDATED 2025
Which of the following is a proper scientific name?
Gram positive streptococcus
Staphylococcus
Streptococcus pyogenes
Anthrax
Streptobacilli -Correct Answer ✔Streptococcus pyogenes

Which of the following microbe groups possess eukaryotic cell structure? Indicate all
that apply.
protozoa
viruses
bacteria
archeans
fungi
Algae -Correct Answer ✔Protozoa
Fungi
Algae

Which group of microorganisms is composed primarily of hereditary material wrapped in
a protein covering?
viruses
bacteria
parasites
fungi
Yeasts -Correct Answer ✔viruses

What is the acronym given to proposed primordial cell which led to the 3 Domains of
Life? -Correct Answer ✔LUCA

Species which lack a membrane-bound nucleus in their cells are called:
prokaryotes
pathogens
eukaryotes
Fermenters -Correct Answer ✔prokaryotes

Which of the following represents the correct way to write/indicate the genus/species
designation of a microorganism?
Staphylococcus Aureus
Staphylococcus aureus
staphylococcus Aureus
Staphylococcus aureus


BIO 320

,BIO 320


Staphyloccus aureus -Correct Answer ✔Staphyloccus aureus

Which area of biology states that living things undergo gradual structural and functional
changes over long periods of time?
morphology
phylogeny
evolution
genetics
none of the above -Correct Answer ✔evolution

All microorganisms are best defined as organisms that:
cause human disease
lack a cell nucleus
are infectious particles
are too small to be seen with the unaided eye
can only be grown in laboratories -Correct Answer ✔are too small to be seen with the
unaided eye

Between 1920 and today, there has been a decline in infectious disease as a leading
cause of death in developed countries. Choose all the developments which have
contributed to this decline.
the development and use of antibiotics
the development and use of vaccines
public health/sanitation programs
access to proper nutrition
the global eradication of pathogenic bacteria -Correct Answer ✔the development and
use of antibiotics
the development and use of vaccines
public health/sanitation programs
access to proper nutrition

Which of the following organelles are used as evidence for the endosymbiont theory of
eukaryotic organelles? (Indicate all that apply).
endoplasmic reticulum
mitochondrion
chloroplast
nucleus
Lysososme -Correct Answer ✔mitochondrion
chloroplast

Which of the following supports the hypothesis that the origins of life on Earth were
based on RNA? (Choose all that apply)
RNA is used as heredity material in viruses
RNA is used as the primary heredity material in bacteria
some RNA molecules have been found with enzymatic activity
ribosomes contain structural RNA molecules


BIO 320

, BIO 320


micro RNAs can regulate transcription/translation
the fossil record provides evidence of 1 billion year-old RNA-based organisms -Correct
Answer ✔RNA is used as heredity material in viruses
some RNA molecules have been found with enzymatic activity
ribosomes contain structural RNA molecules
micro RNAs can regulate transcription/translation

Which scientific field is involved in the classification of living organisms?
nomenclature
taxonomy
phylogeny
Woesean classification -Correct Answer ✔taxonomy

Which of the following pioneers made contributions to Microbiology before the year
1700?
Robert Koch
Antony van Leeuwenhoek
Louis Pasteur
Edward Jenner
Ignaz Semmelweiss -Correct Answer ✔Antony van Leeuwenhoek

To which Domain of Life do viruses belong?
Bacteria
Eukarya
Archaea
Virologica
None -Correct Answer ✔None

Which group of microorganisms is composed primarily of hereditary material wrapped in
a protein covering?
viruses
bacteria
parasites
fungi
Yeasts -Correct Answer ✔viruses

Match the following pioneers of microbiology with their accomplishments.

Ignaz Semmelweiss: Louis Pasteur: Joseph Lister: Robert Koch: Edward Jenner

-Discovery of the role of microbes in fermentation
-Benefits of handwashing in reducing disease transmission:
-Credited with first demonstration of a sucessful vaccine
-Development of a scientific process for assigning specific microbes to diseases




BIO 320

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