Isotopes
The answer has to be 20 characters long so this is irrelevant.
Answer: its a model describing features of a cells plasma membrane.
Is your answer.
Explanation: //Give thanks(and or Brainliest) if helpful (≧▽≦)//
Answer:
cholesterol.
Explanation
Options a, d, c, and e all contains amino acids units. They are therefore made up of protein structure. cholesterol contains alcohol and steroids. it belongs to the steroid lipid family unlike other options that belong to protein family.
