Lipids and Their Types · Zoology

Trans fatty acids differ from cis fatty acids mainly in:

  1. Number of carbon atoms in the chain
  2. Position of the double bond along the chain
  3. Geometry around the double bond
  4. Presence of a carboxyl group at the terminus
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Correct answer: Geometry around the double bond

Trans fatty acids differ from cis fatty acids in the geometric configuration (geometry) around the double bond. In cis fats the hydrogen atoms are on the same side, producing a kinked chain; in trans fats they are on opposite sides, producing a straighter, more linear chain. This difference affects membrane fluidity and is linked to adverse health outcomes.

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