BIO 346 Exam 1,2,3– Human Physiology
Foundations | Complete Review &
Questions 2025
Which of the following taxonomic levels describes
Proteobacteria in the domain Bacteria? –
Answer ☑️phylum
This characteristic is shared among most
Alphaproteobacteria: - Answer ☑️They are oligotrophs
Which of the following bacteria are the most prevalent in the
human gut? – Answer ☑️Bacteroides
The term “deeply branching” refers to which of the
following? – Answer ☑️the position in the evolutionary tree
of deeply branching bacteria
,This species from the order Rickettsiales is known to cause
the Rocky Mountain Fever – Answer ☑️Rickettsia ricketsii
What are the structural differences between gram-positive
and gram-negative bacteria? – Answer ☑️Gram Negative:
-Have outer membrane
-Have Porins
Gram Positive:
-Lack an outer membrane
-Thicker peptidoglycan layer
This order of Beta-proteobacteria includes organisms able to
oxidize ammonia – Answer ☑️Nitrosomonadales
Communion wafers are one of the first known examples of
culture media. What was the microbe that was confused
with blood on the wafer? – Answer ☑️Serratia Marcescens
This order of alpha-proteobacteria includes many bacteria
genera able to fix nitrogen – Answer ☑️Rhizobiales
,Among the Proteobacteria, this class is characterized by
members requiring large amounts of organic nutrients –
Answer ☑️Betaproteobacteria
Describe some of the main characteristics of the
Burkholderiales (Betaproteobacteria). – Answer ☑️Gram-
negative, heterotrophic, can come in many forms like rods,
curved rod, spirochetes, and cocci.
This is the largest class of Proteobacteria with at least 1500
characterized members –
Answer ☑️Gammaproteobacteria
The order Bdellovibrionales includes – Answer ☑️predatory
bacteria
The following bacterial phyla include gram-positive bacteria
– Answer ☑️Actinobacteria and Firmicutes
, This genus from the Planctomycetes is known for containing
a nuclear envelope: - Answer ☑️Gemmata
This genus of gram-positive bacteria is known for its capacity
to produce antibiotics – Answer ☑️Streptomyces
These are the bacterial groups able to produce spores and
endospores – Answer ☑️Clostridiales, Bacillales,
Actinobacteria (Streptomyces)
This group of betaproteobacteria includes bacteria once
thought to be the main drivers of ammonia oxidation in soil
until the discovery of the Thaumarchaeota –
Answer ☑️Nitrosomonadales
What are the categories in which we can classified the
methods to study microbial communities?
Your Answer – Answer ☑️Culture Dependent, Culture
Independent, Metagenomics, Functional Analysis, 16s rRNA
Foundations | Complete Review &
Questions 2025
Which of the following taxonomic levels describes
Proteobacteria in the domain Bacteria? –
Answer ☑️phylum
This characteristic is shared among most
Alphaproteobacteria: - Answer ☑️They are oligotrophs
Which of the following bacteria are the most prevalent in the
human gut? – Answer ☑️Bacteroides
The term “deeply branching” refers to which of the
following? – Answer ☑️the position in the evolutionary tree
of deeply branching bacteria
,This species from the order Rickettsiales is known to cause
the Rocky Mountain Fever – Answer ☑️Rickettsia ricketsii
What are the structural differences between gram-positive
and gram-negative bacteria? – Answer ☑️Gram Negative:
-Have outer membrane
-Have Porins
Gram Positive:
-Lack an outer membrane
-Thicker peptidoglycan layer
This order of Beta-proteobacteria includes organisms able to
oxidize ammonia – Answer ☑️Nitrosomonadales
Communion wafers are one of the first known examples of
culture media. What was the microbe that was confused
with blood on the wafer? – Answer ☑️Serratia Marcescens
This order of alpha-proteobacteria includes many bacteria
genera able to fix nitrogen – Answer ☑️Rhizobiales
,Among the Proteobacteria, this class is characterized by
members requiring large amounts of organic nutrients –
Answer ☑️Betaproteobacteria
Describe some of the main characteristics of the
Burkholderiales (Betaproteobacteria). – Answer ☑️Gram-
negative, heterotrophic, can come in many forms like rods,
curved rod, spirochetes, and cocci.
This is the largest class of Proteobacteria with at least 1500
characterized members –
Answer ☑️Gammaproteobacteria
The order Bdellovibrionales includes – Answer ☑️predatory
bacteria
The following bacterial phyla include gram-positive bacteria
– Answer ☑️Actinobacteria and Firmicutes
, This genus from the Planctomycetes is known for containing
a nuclear envelope: - Answer ☑️Gemmata
This genus of gram-positive bacteria is known for its capacity
to produce antibiotics – Answer ☑️Streptomyces
These are the bacterial groups able to produce spores and
endospores – Answer ☑️Clostridiales, Bacillales,
Actinobacteria (Streptomyces)
This group of betaproteobacteria includes bacteria once
thought to be the main drivers of ammonia oxidation in soil
until the discovery of the Thaumarchaeota –
Answer ☑️Nitrosomonadales
What are the categories in which we can classified the
methods to study microbial communities?
Your Answer – Answer ☑️Culture Dependent, Culture
Independent, Metagenomics, Functional Analysis, 16s rRNA
