21. In membranes, lipids are

A. glycerophospholipids
B. sphingolipids
C. sterols
D. all of these


Correct Answer: D. all of these

22. Which of the following is not found in membranes?

A. Glycoproteins
B. Glycolipids
C. Nucleic acids
D. Phospholipids


Correct Answer: C. Nucleic acids

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