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Cell recognition and the immune system

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Question 11

Trehalose is a disaccharide found in many insects and fungi.

Trehalose is made of two glucose molecules. Glucose has the chemical formula C6H12O6\text{C}_6\text{H}_{12}\text{O}_6C6​H12​O6​.

1.

Give the chemical formula for the disaccharide, trehalose, and describe how it is formed from two glucose molecules.

[2]
2.

In some animals, exposure to fungi can trigger an immune response where antibodies are produced against fungal surface sugars such as trehalose. Draw a labelled diagram of an antibody and identify the specific trehalose-binding site.

[3]
3.

Suggest how one antibody can be specific to both the insect-derived trehalose and a different surface protein from a pathogenic fungus.

[2]

Cell recognition and the immune system Questions

  1. A Level
  2. /Biology
  3. /Cell recognition and the immune system