1.

Write a note on cis and trans form of unsaturated fats.

Answer»

Due to the presence of C=C double bonds, unsaturated fats can have two geometrical isomers, i.e., cis form and transform. 

i. Cis form:

  • In the cis form of an unsaturated fatty acid, the two hydrogens on the two double bonded carbons are on the same side of the double bond. 
  • It is the most common form of unsaturated fats. 
  • Cis fats do not cause deposition of cholesterol in blood vessels and thus, decrease the chance of developing coronary heart disease.

ii. Transform:

  • In the transform of an unsaturated fatty acid, the two hydrogens on the two double bonded carbons are on the opposite sides of the double bond. 
  • Trans fats are difficult to metabolize and may get deposited to dangerous levels in fatty tissues. 
  • Large amount of trans unsaturated fats, increase the tendency of cholesterol getting deposited in the blood vessels leading to increased risk of cardiovascular disease.

[Note: Transform occurs only in animal fats and processed unsaturated fats.]


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