8 the primaryO all of the aboveQUESTION 8The physical properties of cholesterol are best described asamphipathic, chargedamphipathic, unchargedcompletely nonpolarpolar, unchargedpolar, chargedQUESTION 9Which statement is NOT true?Phospholipase A1 hydrolyzes the fatty acid from the 1-position on the glycerol backbone.Phospholipase B2 hydrolyzes the fatty acid from the 2-position' on the glycerol backboneO Phospholipase C hydrolyzes the complete phospho-head group from the glycerol backbone.Phospholipase D hydrolyzes just the nead group from the phospho-glycerol backbone.

Biomolecules that are composed of both hydrophobic and hydrophilic segments are termed amphipathic. Cholesterol is a sterol composed of a sterol nucleus, a hydrocarbon chain and a hydroxyl group. The sterol nucleus is composed of 4 fused hydrocarbon rings (three 6 membered and one 5 membered ring). The hydrocarbon chain is attached to the 5 carbon ring and hydroxyl group is attached to one of the 6 carbon ring.The sterol ring and hydrocarbon chain are hydrophobic (non polar) while the hydroxyl group is hydrophilic (polar). Hence cholesterol is amphipathic. None of the groups or atoms in cholesterol is charged including the hydroxyl group. The hydroxyl group exist in uncharged -OH state and not in charged -O- state in cholesterol. So cholesterol is uncharged. Hence cholesterol is best described as amphipathic, uncharged