Qualification > Sciences

BIOLOGY AS LEVEL---doubts

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unknown 101:

--- Quote from: Spy on May 22, 2010, 01:06:03 pm ---exactly, alah 3alek ya nash ;)

--- End quote ---

hahaha ;)

abuyusef:
wein wallah spy! .... keef 7alak ... hada inta 3arbi!
 

[Spy]:
ah*

unknown 101:
since nobody is answering it on student doubts::

Q 21, jun 07

why is it 20 ??? ??? ???   

[Spy]:
Nashhhh
it told you its double strand with 120 nucleotides ya3ni 60 in each. and mRNA is copied of one only. which means itself kaman its 60.

and when tRNA comes, its uses each three for one amino acid ya3ni total 60/3=20 amino acids in one polypeptide

;)

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