Final answer:
The incorrect statement regarding lipid components in the biomembranes is that all sphingolipids are glycolipids; this is not true because not all sphingolipids contain carbohydrate groups. The correct membrane structure has hydrophilic head groups facing water and hydrophobic tails in the interior, and membrane fluidity and thickness are influenced by lipid composition and temperature.
Step-by-step explanation:
The statement that is WRONG for lipid components in the biomembranes is D. The sphingolipids are all glycolipids. While many sphingolipids do have carbohydrate groups attached to them and are thus glycolipids, not all sphingolipids are glycolipids. There are other types of sphingolipids that do not contain carbohydrate groups.
The correct orientation of phospholipids in the biomembrane is that the hydrophilic head groups face the aqueous solution and the hydrophobic tails are sequestered in the interior of the bilayer. This characteristic is essential for forming the phospholipid bilayer, which is the foundational structure of all cellular membranes.
The fluidity of the membrane is indeed affected by the percentage of unsaturated fatty acids in the phospholipid tails and temperature. Higher proportions of unsaturated fatty acids and higher temperatures generally increase fluidity.
Finally, the thickness of the membrane can indeed be influenced by the types of lipids present. Different lipid compositions can lead to variations in membrane thickness and curvature.