A) 20Å
B) 35Å
C) 55Å
D) 75Å
Correct Answer: D
Solution :
The unit membrane, described by J David Robertson, was considered as 75Å thick trilaminar (3 layered membrane). According to his unit membrane or trilaminar model, unit membrane consists of 35Å thick bimolecular phospholipid layer between two protein layers, each with 20Å thickness.
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