When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Meselson–Stahl experiment - Wikipedia

    en.wikipedia.org/wiki/Meselson–Stahl_experiment

    After that, E. coli cells with only 15 N in their DNA were transferred to a 14 N medium and were allowed to divide; the progress of cell division was monitored by microscopic cell counts and by colony assay. DNA was extracted periodically and was compared to pure 14 N DNA and 15 N DNA. After one replication, the DNA was found to have ...

  3. Semiconservative replication - Wikipedia

    en.wikipedia.org/wiki/Semiconservative_replication

    Semiconservative replication describes the mechanism of DNA replication in all known cells. DNA replication occurs on multiple origins of replication along the DNA template strands. As the DNA double helix is unwound by helicase, replication occurs separately on each template strand in antiparallel directions. This process is known as semi ...

  4. DNA replication - Wikipedia

    en.wikipedia.org/wiki/DNA_replication

    Eukaryotes initiate DNA replication at multiple points in the chromosome, so replication forks meet and terminate at many points in the chromosome. Because eukaryotes have linear chromosomes, DNA replication is unable to reach the very end of the chromosomes. Due to this problem, DNA is lost in each replication cycle from the end of the chromosome.

  5. Eukaryotic DNA replication - Wikipedia

    en.wikipedia.org/wiki/Eukaryotic_DNA_replication

    The process of semiconservative replication for the site of DNA replication is a fork-like DNA structure, the replication fork, where the DNA helix is open, or unwound, exposing unpaired DNA nucleotides for recognition and base pairing for the incorporation of free nucleotides into double-stranded DNA. [3]

  6. Primer binding site - Wikipedia

    en.wikipedia.org/wiki/Primer_binding_site

    A primer binding site is a region of a nucleotide sequence where an RNA or DNA single-stranded primer binds to start replication. The primer binding site is on one of the two complementary strands of a double-stranded nucleotide polymer , in the strand which is to be copied, or is within a single-stranded nucleotide polymer sequence.

  7. Replisome - Wikipedia

    en.wikipedia.org/wiki/Replisome

    The replication of bacteriophage T4 DNA upon infection of E. coli is a well-studied DNA replication system. During the period of exponential DNA increase at 37°C, the rate of elongation is 749 nucleotides per second. [11] The mutation rate during replication is 1.7 mutations per 10 8 base pairs. [12]

  8. Do I need to worry about GMOs? What experts say about ... - AOL

    www.aol.com/lifestyle/worry-gmos-experts...

    The best way to avoid pesticides, if that’s a health concern, is to go with organic food, as unlike organic foods, conventional, non-GMO foods are still likely exposed to pesticides.

  9. DNA synthesis - Wikipedia

    en.wikipedia.org/wiki/DNA_synthesis

    Control of the DNA replication system ensures that the genome is replicated only once per cycle; over-replication induces DNA damage. Deregulation of DNA replication is a key factor in genomic instability during cancer development. [3] This highlights the specificity of DNA synthesis machinery in vivo. Various means exist to artificially ...