Assuming that the DNA molecule carries hereditary information, we can imagine that during the cell division process, at some point this important and intriguing molecule multiplies, allowing the propagation of the genetic code that permeates the existence of life.
Thus, semi-conservative duplication represents the phenomenon resulting from the reproduction of the DNA molecule, in which one of the newly formed molecules retains one of the chains, one of the polynucleotide strands, preceding the mother molecule, producing a new complementary chain to the one that served as its base. mold.
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During this process, the hydrogen bonds between the complementary nitrogenous bases are broken, separating the two DNA strands as if it were a zipper, as a result of the action mediated by the DNA polymerase enzyme.
Through this semi-conservative mechanism, it was and is possible to transmit the elementary characteristics of the genome of all species during the evolution of biodiversity, each in its own time, undergoing selected transformations from generation to generation.
By Krukemberghe Fonseca
Graduated in Biology