Review by : Tika P. Agustina
 |
| http://psychedelicadventure.blogspot.com |
NIM : 201110070311026
Class : Biologi I A
Our body
have more than billion cells. And in the
cell there is nucleus, sorrounded by
solute that like jelly called cytoplasm, and cytoplasm bounded by a thin
cell membrane. In the inside nucleous there is DNA. DNA built by deoxyribose, a
phosphate group, and one of four bases called adenine (A), guanine (G),
cytosine(S), thymin (T). The bases A,G,S,and T make strands like rungs on a ladder. Notice that
the bases always from spesifc pairs, example bases A always pair with U and T.
DNA or deoxyribonucleic
acid is controled our cell. DNA always has same structure it’s from two long strand
that wind around each other to from a double helix, or spiral, similar to a
telephone cord. DNA made by coded
instruction called genes, that needed to build and controled cells activity.
importantly, it’s can also copy itself when cells divide.
In the human body have 46 chromosomes. chromosome consists of
DNA and we have known that DNA consists of nucleotides. Each nucleotide
consists of deoxyribose sugar-celled, another component called a phosphate
group, and one of the four bases DNA can replicate or make copies of itself. This
occurs just before a cell is mitosis or meiosis. The
result is two cells have identical genes. each
base will pair up with her partner, and form a series of letters like the AUG,
to form two new DNA strands are identical
By
:Stere jones, profesor of genetics and author of darwin’s ghost ,
Page
28-29
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