Discuss the role of poly unsaturated fatty acids using the following criteria:

i) Their role in biological system.

ii) The different physical states of fats and oils at room temperature.

iii) Rancidity of fats.

i) Role of Polyunsaturated Fatty Acids in Biological Systems:

Polyunsaturated fatty acids (PUFAs) play a vital role in biological systems due to their unique structural and functional properties. They consist of multiple double bonds, which make them highly flexible and fluid in nature. PUFAs are essential components of biological membranes, particularly in maintaining the fluidity and integrity of cell membranes. This is crucial for cellular function, as membrane fluidity affects the activity of membrane proteins, including enzymes, receptors, and transport systems.

In the human diet, PUFAs, particularly omega-3 and omega-6 fatty acids, are important for maintaining cardiovascular health. Omega-3 PUFAs, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are involved in reducing inflammation and lowering the risk of heart disease by decreasing triglyceride levels and improving the balance of lipoproteins. Similarly, omega-6 PUFAs, like ___ __________ ____ ___ _________ _______ ____ ________ ___ _____ ____ _____.
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