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replication

DNA replication is a biological process that occurs in all living organisms and copies their DNA; it is the basis for biological inheritance. The process starts when one double-stranded DNA molecule produces two identical copies of the molecule. The cell cycle (mitosis) also pertains to the DNA replication/reproduction process.

In a cell, DNA replication begins at specific locations in the genome. Unwinding of DNA at the origin, and synthesis of new strands, forms a replication fork. In addition to DNA polymerase, the enzyme that synthesizes the new DNA by adding nucleotides matched to the template strand, a number of other proteins are associated with the fork and assist in the initiation and continuation of DNA synthesis.

DNA replication can also be performed in vitro. DNA polymerases, isolated from cells, and artificial DNA primers are used to initiate DNA synthesis at known sequences in a template molecule. The polymerase chain reaction (PCR), a common laboratory technique, employs such artificial synthesis in a cyclic manner to amplify a specific target DNA fragment from a pool of DNA.





DNA replication.


Vnější zdroje:




CEBIO

  • CEBIO
  • BC AV CR
  • Budvar
  • CAVD
  • CZBA
  • Eco Tend
  • Envisan Gem
  • Gentrend
  • JAIP
  • Jihočeská univerzita
  • Madeta
  • Forestina
  • ALIDEA

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