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GENERAL BIOLOGY

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GENERAL BIOLOGY

Postby GLORIA08 » Wed Jan 27, 2010 5:28 pm

What BIological Macromolecule has a hydrogen bond.
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Postby JackBean » Wed Jan 27, 2010 9:46 pm

H-bonds are essential for the three-dimensional structure of each macromolecule
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby jwalin » Fri Jan 29, 2010 12:24 pm

do even lipids have them?
it isn't what you do that matters but it is how you do it
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Postby JackBean » Fri Jan 29, 2010 5:13 pm

are lipids macromolecules?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby GLORIA08 » Fri Jan 29, 2010 6:56 pm

What is the hierarchy of biological organization from the list to the most complex level.

what is the pH of a solution with HYDROXYL ION [OH-] concentration of 10-12 M

WHAT IS GEOMETRIC ISOMERS
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Postby JackBean » Fri Jan 29, 2010 7:19 pm

http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby kolean » Fri Jan 29, 2010 10:58 pm

Phospholipids are ampiphilic, and can form hydrogen bonds that way. But mostly lipids are hydrophobic, and their tails like to stay together and keep out the polar water molecules. Though the tails are full of hydrogen bonded to carbon, it is not hydrogen bonding that keeps them together. I forgot what the forces are called that keep the hydrophobic parts together. Anybody know?
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Postby mith » Sat Jan 30, 2010 1:47 am

vanderwaals,
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
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Postby jwalin » Sat Jan 30, 2010 3:52 am

@jackbean
lipids are macromolecules.

when i read the post. i asked Mr. google.
there were 100's that prooved me right

here are 2 of them stating the fact bluntly
http://www.essortment.com/all/whataremacromo_rcpy.htm
http://biology.unm.edu/ccouncil/Biology ... romol.html
it isn't what you do that matters but it is how you do it
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Re: GENERAL BIOLOGY

Postby JackBean » Sat Jan 30, 2010 10:37 pm

OK, I will borrow one picture from your link
Image

Can you tell me, where there are monomers in the lipids?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby jwalin » Sun Jan 31, 2010 6:12 am

yeah very true lipids don't have monomers but i am telling that they are macromolecules. ;)


not meaning to be rude at all :)
it isn't what you do that matters but it is how you do it
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Postby kolean » Sun Jan 31, 2010 1:58 pm

Did you know that macromolecules according to ACS (chemists) can consist of molecules put together without covalent bonds? If you were to look at a chylomicrons (a huge aggregate of lipids from the diet), you would postulate that they are macromolecules: repeating units of lipids that are held together, not covently bonded, with vander Waals forces.
All polymers are macromolecules, but not all macromolecules are polymers.
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