DNA // Proteins 0.0 / 5 ? BiologyDNAProteins Scottish HighersSQA Created by: NiallQCreated on: 01-01-14 16:16 Proteins contain the elements... carbon, hydrogen, oxygen and nitrogen 1 of 5 what is the basic unit of a protein and how many varieties of this unit are there? amino acid, approx. 20 naturally-occurring amino acids giving rise to a huge variety of prooteins 2 of 5 what to amino acids form when they are brought together and how are they held in this way a polypeptide (form a chain) held together by peptide bonds 3 of 5 draw the structure of the primary and secondary polypeptide *P - straight line of amino acids *S - snake like {bc the polypeptide becomes coiled and is held together by other bonds} 4 of 5 What are the two structural possibilities of the tertiary structure of the polypeptide The polypeptide forms sheets known as fibrous proteins, or is wound up to form a ball kno 5 of 5
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