Question

which of the following statements best explains how the membranes in winter wheat are able to remain fluid in extremely cold temperatures?

Answer 1

Membrane fluidity is a measurement of the viscosity of the lipid bilayer. The factors that affect membrane fluidity are temperature, double bonds of unsaturated phospholipids, and the amount of cholesterol.

• The membranes in winter wheat are able to remain fluid in extremely cold temperatures because they contain an increased proportion of UNSATURATED PHOSPHOLIPIDS.

• Unsaturated fatty acids that form phospholipids have at least one double bond, maintaining thus bilayer fluidity by reducing the packing between phospholipids.

• As temperature increases, membrane fluidity increases because it decreases intermolecular interactions between components of the lipid bilayer.

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