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DNA
is like a microfilm onto which thousands of
coded pieces of information were recorded
even before birth, along with the genes which
serve to programme cellular activity such
as the production of proteins, lipids and
enzymes, or pigments like melanin, found at
the heart of the skin. |
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 he
DNA molecule is composed of two very
thin chains wrapped around each other
forming a double helix. The molecule,
as a whole, is thousands of spires and
if the DNA ribbon were to be unraveled
it would reach a length of two metres
for just a micrometer in thickness.
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 When
damaged by exterior aggressions, the
sun's rays for example, DNA is capable
of repairing itself. However, too
much damage leads to mutations of
the genetic code, which can favour
the appearance of cancers, which travel
from cell to cell.
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