- (A) Correct: Lipids such as phosphatidylinositol derivatives act as cofactors or signaling molecules.
- (B) Correct: Prostaglandins are synthesized from arachidonic acid, a polyunsaturated fatty acid.
- (C) Correct: Steroid hormones like cortisol and testosterone are derived from cholesterol (asterol).
- (D) Correct: Vitamins D, A, E, and K are fat-soluble and stored in body fat.
Match Fibre with Application.\[\begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \textbf{Fibre} & \textbf{Application} \\ \hline \hline \text{A. Silk fibre} & \text{I. Fire retardant} \\ \hline \text{B. Wool fibre} & \text{II. Directional lustre} \\ \hline \text{C. Nomex fibre} & \text{III. Bulletproof} \\ \hline \text{D. Kevlar fibre} & \text{IV. Thermal insulation} \\ \hline \end{array}\]