Order Bacterial Physiology Discussion Assignment

Order Bacterial Physiology Discussion Assignment
Order Bacterial Physiology Discussion Assignment
1. The most primitive mode of gene transfer occurs by
transformation
transduction
conjugation
cell fusion Se ee none of the above
2. Which of the following is the stage of growth in which there
is a slow loss of cells through death, which is just balanced
by the formation of new cells through growth and division?
Lag
Acceleration
Exponential
Maximum stationary ee Decline
3. With regard to obligate anaerobic bacteria
oxygen is not toxic to them
air is toxic to them
all contain catalase
spores also die upon exposure to air
they contain large amounts of iron-porphyrin respiratory enzymes
> mOOR
2 / Microbiology
4. Substantial quantity of which of the following inorganic ions
is required for ribosomal function?
A. Mn’ *
BseCa-aCG «Kk?
D: Cu
Ee ieee
Bacteria that grow at temperatures as high as 50-55°C are
known as
A. psychrophiles
B. thermophiles
C. mesophiles
D. cryophiles
E. halophiles
Teichoic acids
A. are found in the walls of many gram-positive bacteria
B. make up the outer wall of gram-negative bacteria
C. provide receptors for phages
D. cover receptors for phages
E. influence the permeability of the membrane
The fine filamentous appendages arising from basal bodies
in the cytoplasmic membrane of many gram-negative bacilli
are known as
A. flagella
B. pili
C. mesosomes
D. capsules
E. spores
All of the following statements regarding bacterial spores
are true BACEPT
they are unusually dehydrated
they do not take ordinary stains
they are metabolically active
they are formed within certain gram-positive cells SOOR> they are more resistant than vegetative cells
10.
11.
12.
13:
Bacterial Physiology / 3
The tetracyclines are identical in their overall mechanism
of action to
ale S
sulfonamides
penicillin
isoniazid
chloramphenicol
aminoglycosides
All of the following statements concerning transduction are
true EXCEPT
A.
B.
moO
a large fragment of the donor’s chromosome is carried
to the recipient by a temperate bacteriophage
a small fragment of the donor’s chromosome is transferred to the recipient
tranduction occurs in many bacteria
transduction may be generalized
transduction may be restricted
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