A Level Biology Lesson 13:

Proteins: The Shape and Function of Enzymes, Antibodies, Transport and Structural Proteins.

Task 1. Check Where this Lesson fits into your Exam Specification!

Task 2. Watch the Revision Notes Lesson in Full.

00:00 Learning Outcomes

00:40 Introduction.

01:07 Proteins are Globular or Fibrous

01:49 Examples of Proteins.

02:09 Enzymes.

02:53 Structural Proteins.

03:25 Collagen.

04:04 Transport Proteins.

04:55 Antibodies.

05:56 Summary.

Task 3. 

Download, Print out & complete the accompanying Interactive Worksheet.


Check Your Spec!


★ AQA Specification Reference: - Proteins and Many proteins are enzymes. Proteins have a variety of functions within all living organisms. Students should be able to relate the structure of proteins to properties of proteins named throughout the specification.


★ CIE Specification Reference: - 2.3 (Biological Molecules) Proteins: An understanding of protein structure and how it is related to function is central to many aspects of biology, such as enzymes, antibodies and muscle contraction. Globular and fibrous proteins play important roles in biological processes such as the transport of gases and providing support for tissues. Collagen as an example of a fibrous protein and relate these structures to their functions. There should be a distinction between collagen molecules and collagen fibres.


★ Edexcel (Biology A – Salters-Nuffield) Specification Reference: - 2.10 (Topic 2: Genes and Health) iii) globular and fibrous proteins iv) Know the molecular structure of a globular protein and a fibrous protein and understand how their structures relate to their functions (including haemoglobin and collagen).


★ Edexcel (Biology B) Specification Reference: - 1.3 Proteins and 1.5 Enzymes. Structure of a protein in determining the properties of fibrous and globular proteins, including collagen and haemoglobin. Understand how the structure of collagen and haemoglobin are related to their function. (i) Know the structure of enzymes as globular proteins.


★ OCR (Biology A) Specification Reference: - 2.1.2 Biological molecules. the structure and function of globular proteins - the properties and functions of fibrous proteins to include collagen and keratin.


★ OCR (Biology B) Specification Reference: - 2.1.3 Proteins and enzymes. How the structure of globular proteins enable enzyme molecules to catalyse specific metabolic reactions. The molecular structure of globular proteins as illustrated by the structure of enzymes and haemoglobin.


★ WJEC Specification Reference: - 1. Basic Biochemistry and Cell Organisation (j) the relationship of the fibrous and globular structure of proteins to their function. 4. Biological reactions are regulated by enzymes. the protein nature of enzymes.

Remember Specifications are often very vague - No matter which exam board you are studying you need to know this.



Darwin T




1Fractured DNA



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