Practice Quiz 19 (Bacteria )
You have 15 minutes to finish the quiz.
Q.1 :
Which is not a component of a bacterial cell?
DNA
Ribosomes
nucleus
cell wall
cell membrane
all are componentsof a bacterial cell
Q.2 :
Identify the mismatched pair
Spherical shaped bacteria ...... coccus
rodlike shaped bacteria .......... bacillus
curved rod .......... vibrios
spiral ........... spirochetes
no mismatched pairs
Q.3:
Which characterizes best heterotrophic chemosynthetic bacteria
a) use organic matter from soil as carbon source
b) use a pigment and sunlight to produce ATP
c) can use CO2 as sole carbon source
d) use glucose as electron source
a and d
a nd c
Q.4
Which is not a prokaryotic organism?
gram-positive bacilli
gram-negative vibrio
protists
archaebacteria
all are prokaryotic organism
Q.5 :
Bacteria that live around deep-sea hot-water vents obtain energy by oxidizing inorganic hydrogen sulfide belched out by the vents. They use this energy to build organic molecules from carbon obtained from the carbon dioxide in the seawater. These bacteria are
photoheterotrophs
chemoautotrophs
chemoheterotrophs.
photoautotrophs
Q.6 :
The bacterium
Bacillus Thuringensis
can withstand heat, dryness, and toxic chemicals that would kill most other bacteria. This indicates that it is probably able to form
endotoxins
peptidoglycan
endospores
protective layers covering the cell wall
Q.7:
Which of the statements about the family of Pseudomonads is false
Similar to Pseudomonas aeruginosa many Pseudomonads are opportunistic pathogens
Many soil organisms which degrade organic matter belong to the Pseudomonads
Some nitrogen fixers are Pseudomonads
all are correct
Q.8:
Which of the following is true of cyanobacteria?
pathogenic.
chemoheterotrophs.
archaea.
protists.
photoautotrophs
Q.9:
Which of the following is a difference between bacteria and archaea?
Archaea are unicellular and bacteria are colonial.
They look very different under a microscope. .
The structure of their cell membranes and cell walls are very different .
Bacteria are autotrophic and archaea are heterotrophic.
they belong to the same domain and are phylogenetically similar
Q.10:
Pathogeny of some bacteria is caused by
their rapid increase in numbers
production of exotoxins
incorporation of bacterial DNA into the host's chromosomal DNA
all of the above