L.7 Recombinant DNA & Biotechnology Flashcards Preview

Kaplan Biochemistry > L.7 Recombinant DNA & Biotechnology > Flashcards

Flashcards in L.7 Recombinant DNA & Biotechnology Deck (11)
Loading flashcards...

What is Recombinant DNA?

DNA made from two different DNA's


What is DNA Cloning?

DNA cloning introduces a fragment of DNA into a Vector Plasmid. A restriction enzyme cuts both the plasmid and the fragment, both are left with "sticky ends". 

When both bind, the transformed plasmids are introduced to bacterial cell to mass reproduce.


What 3 things must a vector contain?

  1. Origin of replication
  2. Fragment of interest 
  3. Antibiotic resistance 


DNA Libraries

Genomic Library vs cDNA Libraries

Genomic Libraries contain a full organism genome, both coding and non-coding, cannot be used to make recombinant proteins or gene therapy

cDNA Libraries are expression libraries only ccontain exons, they can be used to make recombinant proteins and for gene therapy


What is Hybridization?

it is the joining of complementary base pair sequences 


What is and how does the PCR work?

Polymerase Chain Reaction

Using hybridization

 To amplify a segment of DNA using PCR, the sample is first heated so the DNA denatures, or separates into two pieces of single-stranded DNA. Next, an enzyme called "Taq polymerase" synthesizes - builds - two new strands of DNA, using the original strands as templates. This process results in the duplication of the original DNA, with each of the new molecules containing one old and one new strand of DNA. Then each of these strands can be used to create two new copies, and so on, and so on. The cycle of denaturing and synthesizing new DNA is repeated as many as 30 or 40 times, leading to more than one billion exact copies of the original DNA segment.


What kind of gel is used to separate DNA

Agarose gel electrophoresis


Explain Southern Blotting

Southern blotting can be used to detect the presence and quantity of various DNA strands in a sample. After electrophoresis, the sample is transferred to a membrane that can be probed with single-stranded DNA molecules to look for a sequence of interest.

This probe can be tagged


What are dideoxyribonucleotides?

In DNA sequencing ddDNA terminate the DNA chain because they lack the OH at carbon 3


What is Gene Therapy used for?

Gene therapy is a method of curing genetic deciciencies by introducing a functional gene with a viral vector.


What is the difference between

transgenic mice and knockout mice?

Trangenic mice

Integratinf gene of interest into the germ line or embryonic stem cells of a developing mouse (chimeras)


Knockout mice

Created by deleting a gene of interest