Discuss the biological role of lipids (8 marks)

Lipids are fatty acids which can have a structural or functional role in cells:

For example structural lipids in the cell membrane are important in the cell membrane structure as they enable the cell to move and aid in the process of diffusion. Functional roles include that of fatty acid chains such as cholesterol which acts as an energy storage.  These can later be Brocken down into smaller particles to release energy.

it's unlikely a majority of a large population would agree on issues

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i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.