bio 202 exam 1 study guide(8)

bio 202 exam 1 study guide(8) - 11 Proteins a diverse group...

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11. Proteins: a diverse group of polymers that play a critical role in nearly all cell functions Functions: a. metabolism: catalyzing chemical reactions b. signaling: delivering chemical messages throughout cells and tissues of an organism c. transport: carrying molecules into and out of cells throughout the body. d. structure: forming organelles and other cell structures as well as the basis of macroscopic structures. e. movement: moving substances, cells, and body parts f. defense: defending the body against disease-causing agents A. Primary structure: amino acids link together to form a linear polypeptide a. The amino group and the carboxyl group are always the same, but the R-group differs in each of the 20 amino acids. The side chain determines whether the amino acid is polar, nonpolar, or electrically charged (+ or -) A peptide bond is formed between the carboxyl and amino groups of two adjacent amino acids. R1 and R2 represent the different R groups in this polypeptide.
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  • Spring '08
  • dean
  • Biology, Proteins, tertiary protein structure, secondary protein structure

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