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The two main types of molecules which make up the plasma membrane are

The two main types of molecules which make up the plasma membrane are
A) proteins
B) glucose
C) endoplasm
D) both A and C
E) none of the above

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Bruce P. | 20+ year college biology/genetics teacher; I love teaching one-to-one!20+ year college biology/genetics teache...
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Ally: this seems an odd collection of things. You can make a start here by considering these ideas:
1) What is the primary purpose of a biological membrane? (Hint: there's one surrounding the genetic material= the nucleus; one around the entire cell =plasma membrane, one around each organelle =Golgi, smooth & rough ER)....
2) In order for a membrane to perform its primary purpose, what TYPE of molecule is required? Do you see it in the list?
 
Making sure you're clear on definitions can also help--proteins are strings of amino acids that do everything from providing structure to acting as enzymes to functioning as motors
Glucose is a small, water-soluble energy-rich molecule
'endoplasm' is similar/related to cytoplasm--the watery CONTENTS of the cell.
 
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Bruce