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JIPMER 2012
Exam
JIPMER
Year
2012
Subject
Botany
Chapter
Cell - The Unit of Life

JIPMER 2012 · Botany · Cell - The Unit of Life

The thickness of unit membrane is

The thickness of unit membrane isThe thickness of unit membrane is

Options

  1. A20A˚20 Å
  2. B35A˚35 Å
  3. C55A˚55 Å
  4. D75A˚75 Å

Correct answer

D. 75A˚75 Å

Step-by-step solution

The unit membrane, described by JJ David Robertson, was considered as 75A˚75 Å thick trilaminar (3 layered membrane). According to his unit membrane or trilaminar model, unit membrane consists of 35A˚35 Å thick bimolecular phospholipid layer between two protein layers, each with 20A˚20 Å thickness. The thickness of unit membrane is
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