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•single-copy replication control -A control system in which there is only one copy of a replicon per unit bacterium. -The bacterial chromosome and some plasmids have this type of regulation. •multicopy replication control -Occurs when the control system allows the plasmid to exist in more than one copy per individual bacterial cell. Contribution by: mahdi
Rolling circle replication is a mechanism used by some viruses and plasmids to replicate their circular DNA molecules. It involves the synthesis of a single DNA strand, which serves as a template for the production of multiple copies. The rolling circle mechanism starts with the nicking of a circular DNA molecule, followed by the synthesis of a new strand that displaces the original strand, forming a long single-stranded DNA loop. This loop can then be cleaved into unit-length copies to generate multiple identical circular DNA molecules.
Prokaryotic DNA replication has a single origin of replication, leading to two replication forks. In contrast, eukaryotic DNA replication has multiple origins of replication, resulting in multiple replication forks forming along the DNA molecule.
The hydrogen bonds that hold the two DNA strands together are broken. This creates two prongs and each are made up of a single strand of DNA that creates two new partners for the two strands (because they add nucleotides).
DNA replication produces a complimentary DNA strand. Transcription produces a complimentary mRNA strand. The major enzyme that carries out DNA replication is DNA Polymerase III (in prokaryotes). The major enzyme that carries out transcription is RNA Polymerase. DNA replication results in two copies of the DNA. Transciption does not affect the DNA - it simply re-anneals (re-joins) after the process. In DNA replication the complementary base to A is T. In transcription the complementary base to A is U.
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Four copies of a DNA molecule result from two replications of a single DNA molecule. This is because each replication results in two identical daughter molecules.
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•single-copy replication control -A control system in which there is only one copy of a replicon per unit bacterium. -The bacterial chromosome and some plasmids have this type of regulation. •multicopy replication control -Occurs when the control system allows the plasmid to exist in more than one copy per individual bacterial cell. Contribution by: mahdi
The replication process primarily produces two identical copies of DNA from a single original DNA molecule. This process is crucial for cell division, ensuring that each daughter cell receives an exact copy of the genetic material. Additionally, replication can lead to the formation of RNA during transcription, which is essential for protein synthesis. Overall, replication is fundamental for growth, repair, and reproduction in living organisms.