1) Descriptive note on four types of DNA?
2) a note on Nick formation?
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1)The four bases found in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T). These four bases are attached to the sugar-phosphate to form the complete nucleotide, as shown for adenosine monophosphate. Adenine pairs with thymine and guanine pairs with cytosine.
2)A nick is a discontinuity in a double stranded DNA molecule where there is no phosphodiester bond between adjacent nucleotides of one strand typically through damage or enzyme action. Nicks allow for the much-needed release of torsion in the strand during DNA replication. Nicks are also thought to play a role in the DNA mismatch repair mechanisms that fix errors on both the leading and lagging daughter strands.
2)A nick is a discontinuity in a double stranded DNA molecule where there is no phosphodiester bond between adjacent nucleotides of one strand typically through damage or enzyme action. Nicks allow for the much-needed release of torsion in the strand during DNA replication. Nicks are also thought to play a role in the DNA mismatch repair mechanisms that fix errors on both the leading and lagging daughter strands.
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