AS Level Biology - Proteins

**This Powerpoint specifically uses the Cambridge AS Level Biology Syllabus and covers all criteria for – Unit 1.1 The microscope in cell studies
**
Students will be able to -

1 describe and draw the general structure of an amino acid and the formation and breakage of a peptide bond

2 explain the meaning of the terms primary structure, secondary structure, tertiary structure and quaternary structure of proteins

3 describe the types of interaction that hold protein molecules in shape: • hydrophobic interactions • hydrogen bonding • ionic bonding • covalent bonding, including disulfide bonds

4 state that globular proteins are generally soluble and have physiological roles and fibrous proteins are generally insoluble and have structural roles

5 describe the structure of a molecule of haemoglobin as an example of a globular protein, including the formation of its quaternary structure from two alpha (α) chains (α–globin), two beta (β) chains (β–globin) and a haem group

6 relate the structure of haemoglobin to its function, including the importance of iron in the haem group

7 describe the structure of a molecule of collagen as an example of a fibrous protein, and the arrangement of collagen molecules to form collagen fibres

8 relate the structures of collagen molecules and collagen fibres to their function

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

Bring your Cambridge AS Level Biology lessons to life with our expertly designed teaching resources. Each unit is tailored to the latest syllabus, offering ready-to-use lesson plans, engaging experiments, and visually clear notes that save hours of prep time. Whether you’re new to the course or refining your approach, The Science Shelf gives you everything you need to boost student understanding and exam success — all in one place.