Answer:
Sooo.. because i am like superrr smart (not really) i think its C :)
Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot.
Hydrocarbons. (organic compounds entirely made up of hydrogen and oxygen)
Hello,
The prpuse of protiens is to help keep your body healthy and also it is to Repair anything broken torn or Fractred or Sprained
Hope this Helps
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