Exam 1 Flashcards
Which is NOT TRUE of Antoni van Leeuwenhoek?
a. His microscopes were handheld
b. His microscopes only had one lens
c. The magnification power of his microscope was 300X
d. He wrote about his observation in the book Micrographia
e. All of the above are true
f. None of the above are true
D
Which of the following is NOT TRUE regarding Archaeal cell membranes?
a. Phytanyl is a 5-carbon branched hydrocarbon found in the hydrophobic environment of the cell membrane
b. Hydrocarbon chains are linked to glycerol via an ether linkage
c. Monolayers can be formed in microorganisms that live in high temperatures
d. All of the above are true
e. None of the above are true
A
Which of the following is NOT a function of a bacterial cell membrane:
a. Anchorage site for many proteins involved in cellular activity
b. Site of proton motive force
c. Acts as a permeability barrier
d. All of the above are functions of the bacterial cell membrane
e. None of the above are functions of the bacterial cell membrane
D
Which is NOT TRUE for ABC transport mechanisms:
a. Will only be expressed if the solute is present
b The solute binds directly to the transporter initiating its uptake
c. Only a specific solute/subset will be transported by the transporter
d. Energy for transport is provided by hydrolysis of ATP
e. All of the above are true
f. None of the above are true
B
Which of the following is TRUE concerning group translocation transport across the cell membrane?
a. Found commonly in all three domains
b. The system involves a phosphate being transferred to phospoenolpyruvate
c. Enzyme I is specific for the sugar that is being transported in
d. ATP hydrolysis is required for energy
e. All of the above are TRUE
f. NONE of the above are TRUE
f
Which is NOT TRUE regarding the Tat system?
a. It translocates folded proteins
b. Recognition of proteins depends on twin/side-by-side alanine residues
c. The TatA transporter only forms after recognition of the protein for delivery
d. Requires the proton motive force to provide the energy for transport
e. All of the above are true
f. None of the above are true
B
Which is NOT TRUE about the Gram staining procedure?
a. The primary stain is crystal violet
b. Gram’s iodine does not have any effect in Gram-negative organisms
c. The decolorizer should only be applied for 5 seconds
d. Safranin will stain microorganisms pink.
All of the above are true
f. None of the above are true
B
True or False
Bacteria and Archaea are more similar to each other than either is to Eukarya.
False
True or False
Bacterial cells tend to have a smaller surface-to-volume ratio than eukaryotic cells.
False
True or False
If a bacterium is not equipped to handle a hypotonic environment, water will leave the bacterial cell and cause the bacteria to shrivel and die.
False
True or False
Fatty acids are found within the cell membranes of all prokaryotes and eukaryotes.
False
True or False
Both the Sec and Tat pathways require an N(Amino)-terminal signal peptide for the secretion of proteins.
True
True or False
Bacterial flagella are rigid straight structure much like their eukaryotic counterparts.
False
True or False
The MS and C rings found within the basal body of a Bacterial flagellum have a helical arrangement of negative charges to allow rotation.
False
True or False
Porins are the same as aquaporins found in the cell membranes of many
bacterial cells.
False
