BIO210 FINAL EXAMS QUESTIONS AND ANSWERS
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match each description to the correct group of microorganisms.
Single-celled prokaryotes - bacteria
Single or multi-cellular eukaryotes that photosynthesize to obtain energy - algae
Multicellular eukaryotic organisms like parasitic worms - helminths
Minute acellular particles that parasitize cells - viruses
Molds and yeasts - fungi
Unicellular eukaryotes often described as animal-like - protozoa
Please label the image to assess your knowledge of prokaryotic cell structure.
Please label the image to test your understanding of differences in gram-positive
and gram-negative cell structure.
Picture on desktop
Please place the images in the correct order to assess your knowledge of the
sporulation cycle.
picture on desktop
novel prokaryotic organisms that belong to their own superkingdom (domain).
archea
Although they share many bacterial characteristics, members of the Domain
Archaea are more closely related to Domain _________ than to bacteria
eukarya
For example, both archaea and eukaryotes share unique ___________ RNA
sequences and their ribosomal subunit structures are similar as well.
ribosomal
Characteristics that define archaea, however, include the presence of unique
membrane _____, _____ construction and composition and _____ pathways.
lipids, cell wall, metabolic
Such adaptations to their metabolic pathways allow archaea to live in extreme
environments, such as areas with high levels of salt (______) or high
temperatures (______).
halophiles, thermophiles
Why was the penicillin that was prescribed during Mr. Jones's first doctor's visit
ineffective in treating the infection?
The infectious agent was resistant to the drug.
Why was the physician's knowledge of an artificial heart valve important to the
continued treatment of Mr. Jones?
Artificial valves readily support the growth of biofilms containing pathogenic bacteria.
What was the significance of the prior MRSA skin infection?
, Mr. Jones needed to be treated for another drug-resistant infection with multiple
powerful antibiotics.
Microbial biofilms like the one seen here in Mr. Jones's case are the cause of the
majority of __________ infections
chronic
What clues were the most important in arriving at the diagnosis of endocarditis?
Fever of unknown origin, Increased heart rate and breathing, History of valve
replacement, Heart murmur
What most likely killed Mr. Jones?
stroke due to blockage by loosened piece of biofilm
Which of the following surfaces have nutrients available that encourage the
development of biofilms?
moist abiotic surfaces and biotic surfaces such as plant and animal tissue
Which of the following structures leads to reversible binding of bacterial cells to a
surface?
fimbriae and flagella
The production of which substance leads to thickening of the biofilm over time?
exopolymer
Microenvironments are created within the biofilm based on
oxygen gradient
nutrient concentration
pH gradient
True or False: Biofilms are composed of a single bacterial species
false
Please label the figure to further assess your understanding of the process of
biofilm formation.
picture on desktop
True or False: Bacteria are larger than human cells.
false
True or False: Bacteria are only visible with an electron microscope
false
The term used to describe a cluster of spherical bacteria is __________.
staphylococci
What general type of stain is used to separate types of bacteria based on their
cellular structures?
differential
Why must fresh cells be used when performing a Gram stain?
Old cells may not Gram stain properly.
After Gram's iodine is added, what color do the cells appear under a light
microscope?
All cells appear purple
When ethanol is applied correctly, gram-positive cells appear __________ and
gram-negative cells appear __________.
purple, colorless
True or False: The thinner peptidoglycan layer of gram-positive bacteria allows
the crystal-violet-iodine complex to leave the cell.
A+GRADED. Buy Quality Materials!
match each description to the correct group of microorganisms.
Single-celled prokaryotes - bacteria
Single or multi-cellular eukaryotes that photosynthesize to obtain energy - algae
Multicellular eukaryotic organisms like parasitic worms - helminths
Minute acellular particles that parasitize cells - viruses
Molds and yeasts - fungi
Unicellular eukaryotes often described as animal-like - protozoa
Please label the image to assess your knowledge of prokaryotic cell structure.
Please label the image to test your understanding of differences in gram-positive
and gram-negative cell structure.
Picture on desktop
Please place the images in the correct order to assess your knowledge of the
sporulation cycle.
picture on desktop
novel prokaryotic organisms that belong to their own superkingdom (domain).
archea
Although they share many bacterial characteristics, members of the Domain
Archaea are more closely related to Domain _________ than to bacteria
eukarya
For example, both archaea and eukaryotes share unique ___________ RNA
sequences and their ribosomal subunit structures are similar as well.
ribosomal
Characteristics that define archaea, however, include the presence of unique
membrane _____, _____ construction and composition and _____ pathways.
lipids, cell wall, metabolic
Such adaptations to their metabolic pathways allow archaea to live in extreme
environments, such as areas with high levels of salt (______) or high
temperatures (______).
halophiles, thermophiles
Why was the penicillin that was prescribed during Mr. Jones's first doctor's visit
ineffective in treating the infection?
The infectious agent was resistant to the drug.
Why was the physician's knowledge of an artificial heart valve important to the
continued treatment of Mr. Jones?
Artificial valves readily support the growth of biofilms containing pathogenic bacteria.
What was the significance of the prior MRSA skin infection?
, Mr. Jones needed to be treated for another drug-resistant infection with multiple
powerful antibiotics.
Microbial biofilms like the one seen here in Mr. Jones's case are the cause of the
majority of __________ infections
chronic
What clues were the most important in arriving at the diagnosis of endocarditis?
Fever of unknown origin, Increased heart rate and breathing, History of valve
replacement, Heart murmur
What most likely killed Mr. Jones?
stroke due to blockage by loosened piece of biofilm
Which of the following surfaces have nutrients available that encourage the
development of biofilms?
moist abiotic surfaces and biotic surfaces such as plant and animal tissue
Which of the following structures leads to reversible binding of bacterial cells to a
surface?
fimbriae and flagella
The production of which substance leads to thickening of the biofilm over time?
exopolymer
Microenvironments are created within the biofilm based on
oxygen gradient
nutrient concentration
pH gradient
True or False: Biofilms are composed of a single bacterial species
false
Please label the figure to further assess your understanding of the process of
biofilm formation.
picture on desktop
True or False: Bacteria are larger than human cells.
false
True or False: Bacteria are only visible with an electron microscope
false
The term used to describe a cluster of spherical bacteria is __________.
staphylococci
What general type of stain is used to separate types of bacteria based on their
cellular structures?
differential
Why must fresh cells be used when performing a Gram stain?
Old cells may not Gram stain properly.
After Gram's iodine is added, what color do the cells appear under a light
microscope?
All cells appear purple
When ethanol is applied correctly, gram-positive cells appear __________ and
gram-negative cells appear __________.
purple, colorless
True or False: The thinner peptidoglycan layer of gram-positive bacteria allows
the crystal-violet-iodine complex to leave the cell.
