2007-09-09 07:03:26 · 4 answers · asked by wickedwitch1992 2 in Science & Mathematics ➔ Biology
DNA has sequences that are repeated. Different classes of repetitive elements exist as listed in the link below. Some repeats are complex, like transposable elements. Other types of repeats are simple, short sequences like ATATATATAT.....
2007-09-12 19:00:21 · answer #1 · answered by Nimrod 5 · 0⤊ 0⤋
I think you are asking about DNA replication.
DNA replication is the process of copying a double-stranded DNA molecule. This process is important in all known life forms and the general mechanisms of DNA replication are not the same in prokaryotic and eukaryotic organisms. As each DNA strand holds the same genetic information, both strands can serve as templates for the reproduction of the opposite strand. The template strand is preserved in its entirety and the new strand is assembled from nucleotides. This process is called semiconservative replication. The resulting double-stranded DNA molecules are identical; proofreading and error-checking mechanisms exist to ensure extremely high fidelity.
In a cell, DNA replication must happen before cell division. Prokaryotes replicate their DNA throughout the interval between cell divisions. In eukaryotes, timings are highly regulated and this occurs during the S phase of the cell cycle, preceding mitosis or meiosis I.
2007-09-09 07:14:59 · answer #2 · answered by dd 4 · 0⤊ 1⤋
It's not uncommon for certain nucleotide combinations to show a repeating pattern in the DNA sequence. do a search on 'tandem repeats' or something along those lines and you should get lots of hits.
2007-09-09 07:31:13 · answer #3 · answered by John R 7 · 1⤊ 0⤋
Yes DNA replication, I agree with answerer number 1.
2007-09-09 07:24:57 · answer #4 · answered by Anonymous · 0⤊ 1⤋