Although cholesterol is a hydrophobic molecule, it has a hydrophilic head group like all other membrane lipids. true or false?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Can someone me with questions 12 and 13 plz.

Ineed ! i have no clue how to do this problem.