The fluid mosaic model proposed by Singer and Nicolson in 1972 explained that

A. the cell membrane was composed of lipids and proteins.
B. the cell membrane was composed of a phospholipid bilayer but the polar ends of the phospholipid molecules were reversed.
C. the cell membrane was composed of a phospholipid bilayer between two layers of globular proteins.
D. the cell membrane was composed of a phospholipid bilayer with globular proteins actually inserted into the bilayer.


Answer: D

Biology & Microbiology

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