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Why are proteins considered polymers are not

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Why are proteins considered polymers but lipids not??
http://answers.yahoo.com/question/index?qid=20091008173651AAumxgn
Proteins are polymers composed of monomers called amino acids. Lipid is only monomer.
Why are proteins considered polymers but liquids are not??
http://answers.yahoo.com/question/index?qid=20081008165434AA1CbnT
poly = many, mer = piece polymers are large molecules made of many pieces (e.g., amino acids in proteins). common liquids are just collections of individual molecules.

Related Questions Answered on Y!Answers

why are proteins considered polymers but lipids aren't?
Q: why are proteins considered polymers but lipids aren't?
A: ok, how about a non wikipedia source.Lipids to my knowledge don't have polymers. They have maybe small groups of them joined together (phospholipids) but they don't form huge changes which proteins do (polymers of amino acids).
Why are proteins considered polymers while lipids are not?
Q:
A: Proteins, carbohydrates and nucleic acid are all polymers and monomers because they can form long chains (polymer). Lipids cannot form long chain. Also, lipid are not monomer so, it cannot attach more to form a polymer.monomer - individual subunits of polymer or single piece of polymerpolymer - long chains of repeating subunits (monomer)hope it helps..sorry my explanation is short..
Why are proteins considered polymers but lipids are not?
Q:
A: Proteins are repeated units that are covalently bound together. The repeated unit is the amino acid: +H3N-C(-R)-COO-, where the R group hangs off the alpha Carbon (the one between the amine group & the carboxylic acid group) and the R-group determines what the amino acid actually is (for example: the difference between Glycine (R=H) and Valine (R=CH(CH3)2).With lipids, those are simply long-chain hydrocarbons. They could possibly be considered - in portions - polymers of CH2 groups, but that's not entirely accurate because they aren't built from only CH2 groups. The chains can be interrupted with double bonds, with polar heads connected to non-polar tails, etc. They do not consist only of CH2 groups strung together end on end, but a protein will always start with a leading NH3+ and end with a COO-. The protein will always have a backbone that goes (+)N-alphaC-C-O-N-alphaC-C-O-N-alphaC-C-O(-).
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