Page 71 - The Miracle in the Cell

HARUN YAHYA
In recent years, scientists have
observed the fascinating way in which
this problem is solved. The DNA mole-
Exon 1
cule, made up of simple materials like
phosphate, sugar, and carbon, acts in a
way which leaves one dumbfounded.
The unwanted sequence, called an
intron, is coiled into a loop outside of the
main sequence (see Figure 3.4). In this Exon 2
way, the ends of the codons that need to
be read one after the other, but which
are separated by irrelevant information,
are brought together. The regions con-
taining the necessary information are
called exons. The enzyme that reads the
DNA sequence passes by without read-
ing the instructions contained outside in
the loop and continues reading on the
other side. As you can imagine, many
different chemical reactions occur at
each stage of this event. But in the nucle-
us of the tiny cell, there is not the slight-
est confusion or chaos arising from these
reactions.
Exon 3
A second method is used to pre-
vent the problem of the introns. The

Figure 3.6
The genetic code of Beta-globin gene. Codons
needed for synthesis of this protein are highlighted
in pink. DNA presents this region to the enzyme
that synthesizes RNA.

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