Re: Chemical bonding inside living vs non-living things

From: Gregory L. Hansen (glhansen_at_steel.ucs.indiana.edu)
Date: 12/02/04 

Date: Thu, 2 Dec 2004 01:26:23 +0000 (UTC)

In article <adbf5bc1.0412011515.5298cad3@posting.google.com>,
AA Institute <abdul.ahad@ntlworld.com> wrote:

>So how do the molecules *know* they have to group themselves into
>cells which form into the baby's eyes? Another set arrange themselves
>another way to form into ears. Yet further sets form the fingers, etc,
>etc? The cells are surely scattered widely apart along the body of the
>foetus during the 'assembly' process...? What *oversees* that whole
>process? Why do the cells on the head form into hair and the ones near
>the forehead form into eyes?

If you get a degree in developmental biology, you'll be better equipped to
answer that question than anyone on this newsgroup.

When capillaries grow through your muscles, how do the ends know how to
meet? They secrete chemicals, and those on the other side follow the
chemical gradient. There's no one answer, but a lot of special cases.
Genes in your DNA are turned on and off by various criteria. It's your
DNA that directs the production of proteins, which include enzymes and
hormones and pretty much everything else. Messenger RNA is made from the
DNA template, and when a ribosome latches on to it, it zips from one end
to the other matching amino acids to the encoded sequence to create a
protein. And those proteins do the things that proteins do, which might
be structure or signalling or directing chemical actions or whatever. 

-- 
"For every problem there is a solution which is simple, clean and wrong."
 -- Henry Louis Mencken

Relevant Pages

  • Re: how
    ... Cells are the fundamental working units of every living system. ... DNA from all organisms is made up of the same chemical and physical ... The genome is an organism’s complete set of DNA. ... regulating where, when, and in what quantity proteins are made. ...
    (talk.origins)
  • Re: how
    ... Cells are the fundamental working units of every living system. ... DNA from all organisms is made up of the same chemical and physical ... The genome is an organism’s complete set of DNA. ... regulating where, when, and in what quantity proteins are made. ...
    (talk.origins)
  • Re: how
    ... Cells are the fundamental working units of every living system. ... DNA from all organisms is made up of the same chemical and physical ... The genome is an organism?s complete set of DNA. ... regulating where, when, and in what quantity proteins are made. ...
    (talk.origins)
  • Re: how
    ... Cells are the fundamental working units of every living system. ... DNA from all organisms is made up of the same chemical and physical ... The genome is an organism’s complete set of DNA. ... regulating where, when, and in what quantity proteins are made. ...
    (talk.origins)
  • how
    ... Cells are the fundamental working units of every living system. ... DNA from all organisms is made up of the same chemical and physical ... The genome is an organism’s complete set of DNA. ... regulating where, when, and in what quantity proteins are made. ...
    (talk.origins)