740962
Description
Flashcards by jazzballet, updated more than 1 year ago
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Created by jazzballet
about 10 years ago
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| Question | Answer |
| amino acid structure amino group carboxyl group R group hydrogen atom |
Image:
amino_acid (image/jpg)
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| peptide bonds | amino group and carboxyl group condensation reaction H2O is removed so carbon and nitrogen joined by a peptide bond |
| primary structure | order and sequence of amino acids (almost limitless) determines its ultimate shape |
| secondary structure | primary structure effects how is twists up. hydrogen bonds hold the 3D shape in a alpha helix |
| tertiary structure | alpha helix coils up more= complex and unique structure with different bonds: disulfite bonds(strongest), ionic bonds, covalent bonds and hydrogen bonds(weakest) |
| quaternary structure | complex molecule of number of individual polypeptide chains linked together. along with 'prosthetic groups'(haem in hemoglobin-4 polypeptide bonds) |
| test for protein | add sodium hydroxide to sample at room temp. add few drops of copper sulfate solution(biuret solution) if it turns purple=peptide bonds=protein. |
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