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11 Cards in this Set
- Front
- Back
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What is the structure of an amino acid? |
There is an amino group, carboxyl group and a carbon side chain |
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What do two amino acids form? |
A dipeptide |
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What bond forms when two amino acids join? |
A peptide bond |
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What reaction allows a dipeptide to form |
A condensation reaction |
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What is a chain of amino acids joined together called? |
A polypeptide |
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What is the primary structure of a protein? |
The sequence of amino acids in the polypeptide chains This determines the final shape of the protein |
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What is the secondary structure of a protein? |
The initial folding of the molecule into an alpha helix or a beta pleated sheet |
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What is the tertiary structure of a protein? |
The final 3D shape Has hydrogen, ionic and disulphide bonds |
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What is the quaternary structure of a protein? |
Two or more polypeptide chains joined together May combine with non-protein molecules e.g. haemoglobin |
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What is a fibrous protein? |
It performs structural functions E.g. keratin to strengthen hair and nails Collagen to support connective tissue like tendons and ligaments |
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What is a globular protein? |
Spherical molecules with different functions, e.g. Antibodies immobilise antigens Enzymes facilitate reactions Hormones help to coordinate body activity |
