I realy want to know,for example: We say, after syhntesis ,mRNA goes through to por. Then protein syhntesis. But until this moment ,how it do that. I mean it goes through to por. but how ?Or the other things. thoose are  just  molecules " they are not alive"... this is my topic ... cell is alive but its building blocks are not... they do somethings with each other but... how ?They cant decide what they do, they can just interact with each other. There was some chemical things.. yeah.. but what...

 

https://en.wikipedia.org/wiki/Regulation_of_gene_expression

"Regulation of gene expression, or gene regulation,[1] includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA). Sophisticated programs of gene expression are widely observed in biology, for example to trigger developmental pathways, respond to environmental stimuli, or adapt to new food sources. Virtually any step of gene expression can be modulated, from transcriptional initiation, to RNA processing, and to the post-translational modification of a protein. Often, one gene regulator controls another, and so on, in a gene regulatory network."

 

Gene expression can be compared to computer programming if-then-else statement (conditional execution of sub-program).

 

https://en.wikipedia.org/wiki/Three_prime_untranslated_region

"Several regions of the mRNA molecule are not translated into protein including the 5' cap, 5' untranslated region, 3' untranslated region, and the poly(A) tail. The 3'-UTR often contains regulatory regions that post-transcriptionally influence gene expression. "

It can be compared to computer programming for-loop or while-loop, which have sub-routine executed as many times as needed due to external stimuli, and additional parameters to sub-program.

 

"These diverse mechanisms of gene regulation ensure that the correct genes are expressed in the correct cells at the appropriate times. "

Like execution of sub-program with delay in computer programming, if criterion of if-statement is meet.

32 minutes ago, Jnr said:

They cant decide what they do, they can just interact with each other.

They execute program. If criterion A is meet do this. If criterion B is meet do that. If criterion C is meet do something else..