Friday, August 16, 2013

Can you describe how genetic information can be stored in a sequence of nitrogenous bases in DNA and relate it to the structure of DNA.

The DNA molecule is a double helix therefore, either side
can serve as a template to be copied by RNA. DNA stores the genetic code in the nucleus
of every cell. This genetic information is stored in a sequence of nitrogenous bases
that get transcribed or copied by mRNA(messenger RNA). Every three bases is called a
codon. The mRNA codon is actually the information that gets translated once the mRNA
leaves the nucleus and attaches to a ribosome in the cytoplasm. There, each codon will
be translated into a particular amino acid, by the transfer RNA. As each amino acid gets
assembled into a chain, it forms a polypeptide. When the polypeptide reaches a "stop"
codon, the whole molecule detaches from the ribosome and proceeds to fold into a three
dimensional shape. It is now a protein.

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