Andalusia PAU Biology Practice Questions - Andalusia PAU Biology (Biología 2o Bachillerato) Exam

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Why do unsaturated fatty acids with cis double bonds generally have lower melting points than saturated fatty acids of equivalent chain length?

Cis double bonds introduce kinks that prevent tight molecular packing Unsaturated fatty acids form stronger ester bonds with glycerol Saturated fatty acids contain fewer hydrocarbon hydrogen atoms Cis double bonds increase non-polar van der Waals interactions

Correct Answer:

Cis double bonds introduce kinks that prevent tight molecular packing

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