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Protein Recap. Protein Syllabus Draw the general amino acid structure.

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Presentation on theme: "Protein Recap. Protein Syllabus Draw the general amino acid structure."— Presentation transcript:

1 Protein Recap

2 Protein Syllabus

3 Draw the general amino acid structure

4

5 What bond joins amino acids together?

6 Peptide Bond

7 What type of reaction forms a peptide bond?

8 Condensation

9 What type of reaction breaks a peptide bond?

10 Hydrolysis

11 Draw a dipeptide, label the peptide bond

12

13 What are the 4 levels of protein structure?

14 Primary Secondary Tertiary Quaternary

15 What are the 4 types of bonds involved in holding protein shape?

16 Hydrophobic & hydrophilic interactions Ionic bonds Hydrogen bonds Disulphide bonds

17 What is a conjugated protein?

18 Globular protein with a prosthetic group

19 What is haemoglobin’s structure?

20 Globular Conjugated 4 polypeptide chains Inorganic haem group

21 What is haemoglobin’s function?

22 Carry oxygen

23 What is a named enzyme’s structure?

24 Globular Active Site Hydrophobic and philic interactions create tertiary structure E.g. Amylase 3 domains Alpha helixes

25 What is a named enzyme’s function?

26 Amylase Digestion of carbohydrates specifically starch

27 What is insulin’s structure?

28 Two different types of peptide chains. Chain A has 21 amino acids Chain B has 30 amino acids Contain alpha helices 3 disulphide bridges to keep the two chains together

29 What is insulin’s function?

30 Lowers blood glucose Binds to target cells Trigger uptake of glycogen, metabolism of glucose

31 What are the properties and function of keratin?

32 Strong Found in hair, skin & nails Large amounts of cysteine Lots of strong disulfide bonds Less disulfide bonds means more flexible

33 What are the properties and function of collagen?

34 Strong 3 polypeptides wound together Rope like structure Triple helix Hydrogen bonded Flexible Every 3 rd amino acid is glycine Small Closely packed when wound together High amounts of proline and hydroxyproline Repel each other, adding stability

35 What are the properties and function of elastin?

36 To create large, stable, insoluble molecule Can stretch and relax Lots of soluble tropelastin molecules cross linked Have alternating areas of hydrophobic and lysine-rich

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