2. As we told on our previous lectures
a nucleotide looks like the one in
the picture , and many such
nucleotides put together will make
DNA
3. • Every nucleotide has two ends , one end is
carbon position number 5 in which now there
is phosphate attached , and the other end is
carbon position number 3
4. • In DNA the nucleotide it contains are
connected in such a way , that the carbon
position number 3 end of Adenine is connected
with carbon position number 5 of Guanine ,
and u can see in the upcoming picture
5.
6. So what happens When
nucleotides wants to attach with
one another to make DNA
7. When in the cell DNA synthesis is going on , the
nucleotide which are present with in the cell
should be triphosphate , because the
triphosphate are rich of energy they will be
accepted in other nucleotides in order to make a
chain of DNA
8. When a nucleotide of a triphosphate comes to
attach with another nucleotide , energy should
be released in order to create a strong bond
between the two nucleotides ,
to make a chain of DNA
9. In DNA formation the nucleotides are
held together by strong bonds which
are created by the release of energy ,
these bonds are called phosphodiester
bond
10.
11. The enzyme which can break down the
phosphodiester bond is called
Nucleases
12. • And the enzyme which can break down the
DNA is called DNAases
• And the enzyme which can break down the
RNA is called RNAases
