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| support, storage, transport, communication, defense, movement |
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| polymer made from a set of amino acids. One or more form a protein. |
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| amino acid- consists of an amino and a carboxyl group. Form a polypeptide through peptide bonds. Arrangement determines structure, which determines function of protein |
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| primary structure- determined by inherited genetic info. amino substitution can cause sickle-cell disease |
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| protein secondary structure can be coiled alpha helix or folded beta pleated sheet |
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| protein tertiary structure- formed by R group interactions. Disulfide bridges can reinforce structure |
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| quarternary protein structure- 2+ polypeptide chains form a molecule. |
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| fiberous protein, 3 polypeptides coiled like a rope |
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| globularprotein made of 2 alpha and 2 beta chains |
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| changes in pH, salt concentration, temperature, can cause proteins to unravel and lose function |
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| chaperonin- protein molecule that helps fold other proteins |
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| polynucleotides, (DNA- directs replicationand synthesis of mRNA in ribosomes...RNA) |
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| Nucleotide- made of a nucleoside (nitrogenous base + pentose sugar) and a phosphate group |
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| Purines: nitrogenous bases- adenine and guanine |
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| pyrimidines- nucleotides cytosine, thymine, and uracil (RNA) |
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| OH on carbon 3 bonds with Phosphate on a different group's carbon 5 forming a backbone. two backbones run antiparallel in a double helix |
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| differences between DNA and RNA |
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Definition
| DNA does not contain uracil, has a pentose deoxyribose, is double stranded (has 2 nucleotides) |
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