Phospholipids with short or unsaturated fatty acyl chains
A)decrease membrane fluidity.
B)increase membrane fluidity.
C)cause biomembranes to become thicker.
D)allow hydrophilic molecules to diffuse across the lipid bilayer.

Question

Quizplus · Accepted Answer

Phospholipids with short or unsaturated fatty acyl chains can increase the fluidity of a biomembrane. Shorter fatty acyl chains have less intermolecular interactions, allowing for greater movement of the phospholipids. Unsaturated fatty acyl chains have kinks in their structure, preventing tight packing and also increasing fluidity. This property is important for cell membrane function, as it allows for the constant movement of proteins and other molecules within the membrane, as well as providing flexibility for the membrane to change shape.

Phospholipids with Short or Unsaturated Fatty Acyl Chains