Heterocatalytic function of dna
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one of the most important properties of DNA is that it forms its additional identical copies. The process of forming its replica copy is called replication.Replication is the basis of evolution of all morphologically complexed forms of life. Howard and Pelc demonstrated that in eukaryotes replication occurs during interphase between mitotic cycles and also during interphase are seperated into two daughter cells, and thus equal number of chromosomes is maintained.
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When the body determines that it requires more of something (e.g. a
protein) in a cell, an enzyme is secreted into the cell nucleus, which
causes the DNA molecule to open up at a specified place, breaking
the bonds between the purines and pyrimidines.
At the place where the DNA is open, enzymes cause a backbone of
ribose and phospate to form and attract to it the purines and
pyrimidines that are the complements of the exposed bases on the
DNA. This forms a piece of RNA (which is single stranded).
z The piece of RNA that has formed and copied the sequence of
bases onto its own molecule then migrates out of the nucleus into
the cytoplasm, where it becomes the template for protein synthesis.
This piece of RNA is called messenger-RNA or mRNA for short.
protein) in a cell, an enzyme is secreted into the cell nucleus, which
causes the DNA molecule to open up at a specified place, breaking
the bonds between the purines and pyrimidines.
At the place where the DNA is open, enzymes cause a backbone of
ribose and phospate to form and attract to it the purines and
pyrimidines that are the complements of the exposed bases on the
DNA. This forms a piece of RNA (which is single stranded).
z The piece of RNA that has formed and copied the sequence of
bases onto its own molecule then migrates out of the nucleus into
the cytoplasm, where it becomes the template for protein synthesis.
This piece of RNA is called messenger-RNA or mRNA for short.
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