Shared Flashcard Set

Details

Microbiology, bacteria, TENS, etc.
n/a
25
Microbiology
Undergraduate 1
04/17/2011

Additional Microbiology Flashcards

 


 

Cards

Term
Use enterotubes for which bacteria?
Definition
Enteric bacteria
Term
2 properties of enteric bacteria?
Definition
Gram - and Oxidase -
Term
# of media and biochemical tests in enterotube?
Definition
12 media, 15 biochemical tests
Term
2 enterotube tests?
Definition
Citrate test, Urea test
Term
Transformation?
Definition
Ability of bacteria to take naked DNA from environment
Term
What's TENS solution for?
Definition
Lyse cells
Term
Horizontal gene transfer?
Definition
Bacterium incorporates DNA from Unrelated (can be same species, but not a direct relative or ancestor) bacterium
Term
Vertical gene transfer?
Definition
Bacterium receives genetic material from Relative.
Term
Gene transfer for Transformation?
Definition
Horizontal
Term
2 naturally competent bacteria?
Definition
Streptococcus and Acietobacter
Term
Steps of transformation experiment?
Definition
Make POB and Glucose control plates and put ADP 6 and 1 into both. Put 1.5 mL ADP-1 in centrifuge for 2 min at 10k RPM. Discard supernatant, keep pellet. Put 300 microL TENS to pellet to lyse cells. Make serial dilutions. Prepare a POB plate with ADP-6 with spread plate technique. Divide to 4 quadrants. In quadrant 1, put 1 microL ADP-1 serially diluted by 10 --> quadrant 4, serially diluted by 10^(-3). Grow for 24 to 48 hrs.
Term
Conjugation?
Definition
transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells
Term
Difference between Transformation and Conjugation?
Definition
Transformation, bacterium gets DNA from environment. Conjugation, bacterium gets DNA from another bacterium.
Term
Plasmid?
Definition
Extrachromosomal genetic element that occurs in many bacterial strains. Circular DNA, replicate independently from bacterial chromosome. Not essential for bacterium but may be an advantage.
Term
Why no growth in E. coli streak on test plate?
Definition
E. coli is F-
Term
Difference between Auxotroph and Prototroph?
Definition
Auxotroph, can't make a particular organic compound needed for its growth. Prototroph, can make all compounds needed for growth.
Term
What is TENS made of?
Definition
Tris buffer,
Ethylenediaminetetraacetic acid,
NaOH,
Sodium dodecyl sulfate
Term
Gene transfer for Conjugation?
Definition
Horizontal
Term
Why more growth at 1/10 dilution than full strength?
Definition
There was still leftover TENS solution in full strength, so it killed some ADP-6 bacteria. Less TENS solution in 1/10 dilution, so didn't kill bacteria.
Term
F+
Definition
Gene in cell's plasmid that can make pilus and thus perform conjugation
Term
F-
Definition
Gene to form pilus is missing in bacteria's plasmid, thus cannot perform conjugation.
Term
Leu-, Tol+ bacteria grow in Tol media w/out Leu?
Definition
No
Term
Leu-, Tol+ bacteria grow in glucose minimal media?
Definition
No
Term
Leu-, Tol+ bacteria grow in Leu media w/out Tol?
Definition
Yes
Term
Leu-, Tol+ bacteria grow in nutrient broth?
Definition
Yes
Supporting users have an ad free experience!