22414796
Description
Flashcards by Evian Chai, updated more than 1 year ago
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Created by Evian Chai
about 4 years ago
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| Question | Answer |
| What determines the properties of amino acids? | The R group |
| All amino acids (except glycine with H R group) are .... with a ... center They are optical isomers meaning | Asymmetrical Chiral carbon they are nonsuperimposable mirror images |
| What are the four groups attached to the carbon on a Amino Acid? | 1. Carboxyl group COOH 2. H group 3. Amino Group NH2 4. R group |
| The isoelectric point is | The pH where the AA carries no charge |
| How are amino acids joined together? | By a condensation reaction between the amino group of one and carboxyl group of another Forms a peptide bond(covalent) |
| In a polypeptide, amino acids are made at the ... terminus and joined at the ...terminus | 1. N (amino) 2. Carboxyl |
| Functions and examples of proteins 1) ... - Collagen - Keratin 2) ... - Actin - Myosin 3) ... - Trypsin - DNA polymerase 4) ... - Haemoglobin 5) ... - Na+/K+ pump 6) ... - Insulin 7) ... - ACh receptors (nicotinic & muscarinic) 8) .... - Antibodies - Clotting factors 9) ... - Histones 10) .... - Tubulin | 1. Structural 2. Movement 3. Enzymes/catalysts 4. Transport 5. Membrane transport 6. Hormones 7. Receptors 8. Defense 9. Gene regulating 10. Chromosome sorting |
| The primary structure is the | 2D Linear sequence of amino acids joined together by peptide bonds |
| Secondary structure is caused by Alpha helix is caused by bonds between.... Side chains are located... Beta sheet is caused by bonds between.... side chains are located... | Hydrogen bonding between peptide bond of C=O and N-H every 4th peptide on the outside adjacent polypeptides above and below plane of each sheet (alternate) |
| Fibrillar proteins have more...amino acids while hemoglonbins have more... | beta sheet for strength/little elasticity Alpha helix |
| Tertiary structure folding is mainly dependant on .... The shape determines? The three types of bonds are? | Hydrophobic portions folding in The function of the active site 1. H bonds 2. Covalent Disulphide bridges 3. Ionic bonds |
| Quaternary structure is | 2+ polypeptides linked together via same forces as tertiary structure |
| Structure of collagen? | Right handed TRIPLE helix Contains modified aa (hydroxylysine etc.) |
| Scurvy is caused by... This impacts | 1. Deficiency in VIT C 2. The stability of the triple helix of collagen |
| How does oxygenation affect hemoglobin and its R group pKa? | Its pKa DECREASES so it becomes a stronger acid |
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