21. In membranes, lipids are
A. glycerophospholipids
B. sphingolipids
C. sterols
D. all of these
22. Which of the following is not found in membranes?
A. Glycoproteins
B. Glycolipids
C. Nucleic acids
D. Phospholipids
21. In membranes, lipids are
A. glycerophospholipids
B. sphingolipids
C. sterols
D. all of these
22. Which of the following is not found in membranes?
A. Glycoproteins
B. Glycolipids
C. Nucleic acids
D. Phospholipids