How might the presence of saturated fatty acids in cell membranes affect membrane fluidity?

• A. Saturated fatty acids increase membrane rigidity due to loose packing.
• B. Saturated fatty acids increase membrane fluidity due to loose packing.
• C. Saturated fatty acids decrease membrane fluidity due to tight packing.
• D. Saturated fatty acids have no effect on membrane fluidity.

Answer: (C)