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DNA repairis a collection of processes by which a cellidentifies and corrects damage to the DNAmolecules that encode its genome.[1] In human cells, both normal metabolicactivities and environmental factors such as radiationcan cause DNA damage, resulting in tens of thousands of individual molecular lesionsper cell per day.[2] Many of these lesions cause structural damage to the DNA molecule ...
DNA profiling is a forensic technique in criminal investigations, comparing criminal suspects' profiles to DNA evidence so as to assess the likelihood of their involvement in the crime. [1] [2] It is also used in paternity testing, [3] to establish immigration eligibility, [4] and in genealogical and medical research. DNA profiling has also been used in the study of animal and plant ...
The polymerase chain reaction ( PCR) is a method widely used to make millions to billions of copies of a specific DNA sample rapidly, allowing scientists to amplify a very small sample of DNA (or a part of it) sufficiently to enable detailed study. PCR was invented in 1983 by American biochemist Kary Mullis at Cetus Corporation.
A bacterial DNA transposon. A transposable element ( TE, transposon, or jumping gene) is a nucleic acid sequence in DNA that can change its position within a genome, sometimes creating or reversing mutations and altering the cell's genetic identity and genome size. [1] Transposition often results in duplication of the same genetic material.
DNA transposon DNA transposons are DNA sequences, sometimes referred to "jumping genes", that can move and integrate to different locations within the genome. [1] They are class II transposable elements (TEs) that move through a DNA intermediate, as opposed to class I TEs, retrotransposons, that move through an RNA intermediate. [2] DNA transposons can move in the DNA of an organism via a ...
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently. They are most commonly found as small circular, double-stranded DNA molecules in bacteria; however, plasmids are sometimes present in archaea and eukaryotic organisms. [1] [2] Plasmids often carry useful genes, such as for antibiotic resistance ...
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