16. Lysozymes are found in
A. plant cells
B. animal cells
C. microbial cells
D. all of these
17. Biological membranes are like water beds because
A. they are always moving
B. they (normally) do not leak their contents
C. the membrane is thin compared to the enclosed volume
D. all of the above
18. The plasma membrane is a selectively permeable barrier due to the presence of specific transport
A. proteins
B. amino acids
C. carbohydrates
D. none of these
19. Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?
A. Cholesterol
B. Phospholipid
C. Protein
D. Carbohydrate
20. Which of the following is correct?
A. Membranes form boundaries around the cell and distinct subcellular components
B. Membranes act as a selectively permeable barrier
C. Membranes contain varying amount of lipid and protein and some contain a small amount of carbohydrates
D. All of the above
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