Long, saturated fatty acid tails lipid mobility and membrane fluidity. enhance; increase reduce; increase enhance; maintain maintain; decrease reduce; decrease

reduce lipid mobility
decrease membrane fluidity

When fatty acid tails are saturated, it means that their conformation is perfectly straight becoming easy to compact more and more fatty acids, as they fit perfectly together, and therefore reducing lipid mobility. In turn, if lipid mobility is reduced, the membrane fluidity is decreased because the lipids are too "stiff" together.

You would put 10/1 x 2/3 = 20/3

Simplify: 6 2/3