According to unit membrane structure, the thickness of plasma membrane is about

Options

A. a) `35 Å`
B. b) `20 Å`
C. c) `75 Å`
D. d) `100 Å`

Answer

C

Explanation

According to Robertson's concept of unit membrane, the cell membrane is trilaminar. It has a thickness of about `75 Å` with a central lipid layer of `35 Å` thcik and two peripheral protein layers of `20 Å` each.