33 Questions
In a Gram-negative bacterium, where would you expect to find porins?
In the outer membrane
where would you expect to find lipopolysaccharide (LPS)?
The outer membrane of a typical Gram-negative bacterium
Which of the following is the best description of pili (singular pilis)?
Extracellular protein rods
Which of the following could be used as a terminal electron acceptor by a bacterial cell that obtains energy by oxidizing nitrite (NO2-) to nitrate (NO3-)?
Oxygen (O2)
Which of the following would be an appropriate description of the cell described: A bacterial cell that obtains energy by oxidizing nitrite (NO2-) to nitrate (NO3-)
A lithotroph
This question is about endospores. Which of the following is NOT correct?
Endospores are produced by most members of Actinobacteria
Which of the following traits is NOT seen in 'enteric bacteria' (Enterobacteria, ex: Escherichia coli)?
Teichoic acids
Which of the following is NOT correct?
Bacteriochlorophylls are present in green sulfur bacteria (Chlorobi) but not in purple bacteria
Which of the following features would you expect to find in a member of Domain Archaea?
A single circular chromosome
In Eukaryotic algae that obtained their plastids by secondary endosymbiosis, what was the evolutionary origin of the innermost of the membranes surrounding the plastid?
The cell membrane of the cyanobacterial endosymbiont
The diagram (think of the box) shows a transverse section of the frustule of a diatom (Bacillariophyta). Which of the following correctly labels the components 'A', 'B' and 'C'
A = Valve, B = Girdle band, C = Epitheca
This question is about the life cycle of Apicomplexa (members of the genus Plasmodium, the causative agent of malaria). Which of the following is the life-cycle stage produced via meiosis?
Sporozoites
Which of the following occurs during 'conjugation' in typical ciliates?
Haploid nuclei are exchanged between two cells
Which of the following groups of Fungi would normally have septate hyphae?
Both A and B
this is a question about the life cycle of (most) red algae. Which of the following is diploid?
The carpospores
Which of the following best describes the thallus of Macrocytis sporophytes?
Develops through parenchymatous growth with some medullary cells in the form of 'trumpet hyphae'
which of the following represents a monophyletic group of organisms?
None of the above
which of the following is the best description of the makeup of peptidoglycan?
Polysaccharides linked by short chains of amino acids
Where do you find lipopolysaccharides (LPS)?
Outer membrane of Gram-negative bacteria
Which of the following best describes the bacterial flagellum?
A rotating filament powered by the proton motive force (PMF)
This question is about typical endospores. Which of the following is correct?
The cortex wall of the endospore contains modified peptidoglycan
Which of the following produces oxygen (o2) as a waste product during photosynthesis?
Cyanobacteria
Which of the following is most correct? 'The standard cell membrane lipids of Archaea..."
... have hydrophobic tails attached to the glycerol backbone via 'ether' bonds (C-O-C)
Which of the following is most correct?
Methanogens are obligate anaerobes
Which of the following is the most typical number of membranes surrounding the plastid of a 'secondary alga'?
4
In 'secondary endosymbiosis', what was the endosymbiont?
A primary alga
This question is about the diatom frustule. When are 'valves' made?
Each cell makes one valve only shortly after cell division
Which of the following occurs before/during binary fission (asexual reproduction) in typical ciliates?
Micronuclei undergo mitosis, while macronuclei divide through a non-mitotic process
From the following options, which best describes when the endospore's cortex is synthesized (ex: in Bacillus)?
While the forespore is within the mother cell
which of the following is most correct? The standard cell membrane lipids of Archaea...
... are much more similar to those of eukaryotes than those of bacteria
This question is about bacterial flagella. Which of the following is NOT correct?
The flagellum is powered by ATP hydrolysis
Which of the following forms a ring around the middle of a bacterial cell?
FtsZ
From the following choices, what would you call a cell that oxidizes sulfur (S) to obtain energy and converts CO2 into new organic molecules for building new biomass?
Chemoautotroph
This quiz tests your knowledge on the location of porins in Gram-negative bacteria. Porins are typically found in the outer membrane of Gram-negative bacteria, serving as channels for the passage of molecules. Test your understanding of bacterial structure with this quiz!
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