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Test 2 Review
Chapter 5-7
35
Microbiology
Undergraduate 2
10/13/2011

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Cards

Term
Which of the following statements about photophosphorylation is false?
Definition
It requires CO2
Term
A strictly fermentative bacterium produces energy
Definition
By glycosis only
Term
Which of the following statements about beta oxidation is false?
Definition
B) It involves the formation of 2-carbon units.
Term
In noncyclic photophosphorylation, O2 is produced from
Definition
H2O
Term
Which of the following uses CO2 for carbon and H2 for energy?
Definition
Chemoautotroph
Term
Cyanobacteria are a type of
Definition
Photoautotroph
Term
Beggiatoa bacteria get energy by oxidizing S2- to S6+. This means they take ___ for their ___.
Definition
electrons; electron transport chain
Term
The term facilitative anaerobe refers to an organism
Definition
uses oxygen or grows w/o oxygen
Term
Which of the following is an advantage of the standard plate count?
Definition
Determines the number of viable cells
Term
Thirty-six colonies grew in nutrient agar from 1.0 ml of undiluted sample in a standard plate count. How many cells were in the original sample?
Definition
36
Term
Most bacteria grow best at pH:
Definition
7
Term
A culture medium consisting of agar, human blood, and beef heart is a:
Definition
Complex medium.
Term
Which of the following statements define generation time the best?
Definition
The length of time needed for a cell to divide
Term
Which group of microorganisms is most likely to spoil a freshwater trout preserved with salt?
Definition
Facultative halophiles
Term
Patients with indwelling catheters are susceptible to infections because:
Definition
Biofilms develop on catheters.
Term
Which of the following is the best method to sterilize heat-labile solutions?
Definition
A) Membrane filtration
Term
Which of the following best describes the pattern of microbial death?
Definition
B) The cells in a population die at a constant rate.
Term
Which of the following substances can sterilize?
Definition
Ethylene Oxide
Term
Iodophors differ from iodine (I2) in that iodophors:
Definition
A) Don't stain.
B) Are less irritating.
C) Are longer lasting.
D) Are combined with a nonionic detergent.
E) All of the above. <-----
Term
Which of the following affects the elimination of bacteria from an object?
Definition
A) Number of bacteria present
B) Temperature
C) pH
D) Presence of organic matter
E) All of the above <----
Term
Which of the following could be used to sterilize plastic Petri plates in a plastic wrapper?
Definition
A) Gamma radiation
Term
A disk-diffusion test using Staphylococcus gave the following results:
Table 1.



Which compound was the most effective against Staphylococcus?
Definition
C) C
Term
In Table 1, which compound was the most effective against E. coli?
Definition
E) Can't tell
Term
Which of the following will NOT destroy prions?
Definition
D) Boiling
Term
If you were preparing nutrient agar at home and didnt have an autoclave, what could you use to sterilize the nutrient agar?
Definition
A) Pressure cooker at 121°C for 15 minutes
Term
DNA is made of:
Definition
C) Two strands of nucleotides running antiparallel.
Term
Which of the following is NOT a product of transcription?
Definition
A) A new strand of DNA
Term
An enzyme produced in response to the presence of a substrate is called:
Definition
B) An inducible enzyme.
Term
According to the operon model, for the synthesis of an inducible enzyme to occur, the
Definition
C) Substrate must bind to the repressor.
Term
Synthesis of a repressible enzyme is stopped by:
Definition
E) The corepressor-repressor binding to the operator.
Term
In transcription,
Definition
C) DNA is copied to RNA.
Term
Table 2



If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysine-leucine, what is the order of bases in the template strand of DNA?
Use Table 2 for reference
Definition
B) 3′- AGACGTTTCAAT
Term
(Use Table 2) The anticodon for valine is:
Definition
E) CAA
Term
(Use Table 2) What is the sequence of amino acids encoded by the following sequence of bases in a strand of DNA?

3 ATTACGCTTTGC
Definition
D) Transcription would stop at the first codon
Term
Figure 4


In Figure 4, which model of the lac operon correctly shows RNA polymerase, lactose, and repressor protein when the structural genes are being transcribed?
Definition
D) d
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