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AP Biology
Unit 1 – Chemistry of Life
Topic 1.3
The structure of biological molecules determines how they behave. In a cell's plasma membrane the saturation of carbon found in the fatty acid tails can change membrane flexibility. Which statement best explains this?
When carbon's a fully saturated the carbon chain does not have double bonds, creating a more flexible membrane.
The presence of cholesterol increases the space between phospholipids, creating a more flexible membrane.
Saturated fatty acids have C-C double bonds creating bends in the fatty acid tails.
Unsaturated fatty acids have C-C double bonds creating bends in the fatty acid tails.
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AP Biology - 1.3 Introduction to Biological Macromolecules
Key terms
Fatty Acid Tails
Plasma Membrane
Membrane Flexibility
Saturation
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