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Macromolecules
The major constituents of cells
8
Biology
Undergraduate 4
04/13/2010

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Term
Macromolecules
Definition
are polymers with molecular weight above 5000, that are assembled from relatively simple precursors.
Term
Oligomers
Definition
shorter polymers.
Term
proteins
Definition
long polymers of amino acids, constitute the largest fractioni  of a cell. some proteins have catalytic activity and funtion as enzymes.  Others serve as structural elements, signal receptors, or trasporters that carry specific substances  into or out of cell.
Term
Proteome
Definition
The sum of all the proteins functioning in a given cell
Term
Nucleic Acid
Definition
Polymers of nucleotides. They store and transmit genetic information, and some RNA molecules have strutural and catalytic roles in supramolecular complexes.
Term
Polysaccharides
Definition
polymers of simple sugars.  Have three major functions: energy rich fuel storage, rigid structural components of cell wall, and extracellular recognition elements tha bind to proteins on other cells.
Term
Lipids
Definition
water insoluble hydrocarbon derivative, serve as structural components of membranes, energy rich storage, pigments, and intracellular signals.
Term
Informational Macromolecules
Definition
often referred as this for their characteristic information rich subunit sequences, proteins and nucleic acids
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