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BS111L last quiz
pcr and id of bacterial unknown
18
Biology
Undergraduate 2
06/30/2009

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Term
PCR requires
Definition
template DNA
oligonucleotide primers
Taq DNA polymerase
dNTPs
buffer
MgCl2
Term
MgCl2
Definition
co-factor for taq polymerase
Term
PCR Steps
Definition
1. denaturing (95)
2. annealing (55)
3. extension/elongation (72)
Term
polyacrylamide gels are used for....
Definition
small DNA fragments
Term
agarose gels are used for
Definition
larger DNA fragments
Term
how are gels seen after they are run?
Definition
UV light
Term
endonucleases
Definition
  • naturally occur in prokaryotes
  • recognize foreign DNA sequences and cut it into pieces
  • Term
    amplification primers
    Definition
    determine target specificity
    Term
    Purines
    Definition
    Adenine, Guanine
    Term
    Pyrimidines
    Definition
    Thymine, cytosine
    Term
    What pair forms 3 Hydrogen bonds?
    Definition
    G-C
    Term
    What pair forms 2 Hydrogen bonds?
    Definition
    A-T
    Term
    Oligonucleotide primers
    Definition
    short ssDNA
    Term
    1) Denaturation
    Definition
  • 1 strand is separated from the other
  • 20 seconds
  • disrupts H bonds
  • Term
    2) Annealing
    Definition
  • annealing of primers to single stranded DNA template
  • 45 seconds
  • Term
    Agarose Gel Electrophoresis
    1) what is molecular size marker?
    2) segments separated by...?
    Definition
    1)HindIII digested lambda DNA
    2)separates DNA fragments by size
    Term
    defense against bacteriophages
    Definition
    restriction endonucleases
    Term
    SS 16S
    1)used for?
    2) what do they contain thatr is useful for bacterial identification?
    Definition
    1) phylogenic studies
    2) hyper variable regions which can provide species-specific signature sequences for bacterial identification
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