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Define the term 'pathogen' - VCE - SSCE Biology - Question 4 - 2014 - Paper 1
Question 4
Define the term 'pathogen'. The diagram below shows a generalised pathogen with antigens on its surface. The immune system responds to antigens by making antibodies... show full transcript
Worked Solution & Example Answer:Define the term 'pathogen' - VCE - SSCE Biology - Question 4 - 2014 - Paper 1
Step 1
Step 2
Draw an antibody that would be effective against this pathogen. Label the different parts of the antibody.
Answer
To draw an effective antibody against the pathogen, the structure can be depicted as a Y-shaped molecule. The different parts to label include:
- Variable Region (V): The tips of the Y-shaped structure that recognize and bind to the specific antigen on the pathogen.
- Constant Region (C): The stem of the Y that remains the same regardless of the type of antigen the antibody binds to.
- Fab Region: The arms of the Y that consist of the variable region and are responsible for binding to the antigen.
- Fc Region: The base of the Y which interacts with immune cells, aiding in the pathogen's destruction.