Why are bacteria human diseases emerging and re-emerging?
- they are becoming resistant to antibiotics
- encroachment of previously uninhabited (wild) areas
- diseases in animals mutate to cross the species barrier
- all of the above are true
all of the above are true
When DNA is transferred from one prokaryote to another via a pilus, this is called
- binary fission
- conjugation
- transduction
- transformation
conjugation
Archaea that can survive in high salt concentrations are termed:
- osmophiles
- alkaliphiles
- halophiles
- psychrophiles
halophiles
Which of the following is true about "blue-green" algae?
- they produce oxygen
- they are classified as plants
- they are heterotrophs
- all of the above are true
they produce oxygen
Archaea that can live in cooler temperatures (5-50 degrees Fahrenheit or lower) are termed
- themophiles
- psychrophiles
- osmophiles
- hyperthemophiles
psychrophiles
Which of the following structures is different when comparing bacteria to archaea?
- cell morphology
- chromosomes
- cell type
- plasma membrane lipids
plasma membrane lipids
By its name, methicillian-resistance Staphylococcus aureus (MRSA) would be what shape under a microscope?
- round
- spiral
- gram positive
- rod-like
round
Which is true of gram positive organisms?
- they are more resistant to antibiotics
- their cell walls are largely composed of peptidoglycan
- the cell wall of gram positive bacteria is then when compared to gram-negative bacteria
- all of the above are true
their cell walls are largely composed of peptidoglycan
Unlike eukaryotes that have a nucleus, prokaryotes do not contain any DNA.
- True
- False
False
A rock formed when prokaryotes precipitate minerals out of water is called
- a microbial mat
- a hydrothermal vent
- a biofilm
- a stromatolite
a stromatolite
Bacteria play important roles in:
- agriculture
- waste management
- digesting food in humans
- all of the above are true
all of the above are true
Using bacteria to clean up an oil spill is an example of
- pathogenesis
- nitrogen fixation
- bioremediation
- bacterial respiration
bioremediation
When a bacteria gets it energy from light, electrons from inorganic material, and its carbon source is carbon dioxide, it is termed a:
- chemolithoheterotroph
- chemolithoautotroph
- photolithoautotroph
- photoorganoheterotroph
photolithoautotroph
Most foodborne illness cases today are linked to produce rather than animal-based foods.
- True
- False
True
Which type of bacteria tends to be more resistant to antibiotics?
- gram positive
- gram negative
gram negative
Which of the following are the same when comparing bacteria to archaea?
- cell membrane type
- replication origins
- cell wall
- chromosome shape
cell wall
WRONG
When bacteria take up prokaryotic DNA directly from the environment, this is termed
- transformation
- conjugation
- transduction
- binary fission
transformation