How does DNA replicate?
unwinding: the old stands that make up the parent molecule are unwound or unzipped. a special enzyme called helicase unwinds the molecule.complementary base pairing:new complimentary nucleotides(A to T, and C to G) are positioned by base pairing. joining:the complimentary nucleotides join to form new strands. each daughter strand contains one old strand and one new strand.
Mitochondria are able to replicate by themselves. When mitochondria replicate, a copy of the mitochondrial DNA is present in the daughter mitochondria as well. This is how they are passed on. Edit: Mitochondrial DNA is passed on maternally (ie the mito. that replicate in a new organism are derived from the mother/egg).
If a cell contains all the genetic material it needs to synthesize protein why must the DNA also replicate?
Assuming you mean prokaryotic cells... Many viruses replicate use DNA or RNA in their genetic structure. Prokaryotic cells replicate by translating their DNA into RNA and then transferring it back into DNA. Many viruses hook into this system and use the prokaryotic replication to make copies of their own DNA or RNA. Otherwise, many viruses replicate within prokaryotic cells in a parasitic relationship, using the genetic material, energy and parts of the cell to replicate…