Single Choice

Who gave the lamellar or sandwich model of cell membrane?

ASinger and Nicolson
BDanielli and Davson
Correct Answer
CJ. Robertson
DNone of these

Solution

1935, Danielli and Davson proposed that cell membrane is made of a double layer of phsopholipid molecules sanwiched between two single layers of proteins. The three layers are held together by electrostatic forces while phospholipid layers are kept adhered by vander Waal's forces.

SIMILAR QUESTIONS

Cells - The Unit of Life

What would happen if the plasma membrane ruptures or breaks down?

Cells - The Unit of Life

Select the correct option: Cell recognition and adhesion are facilitated by components of the plasma membrane. These components are generally.

Cells - The Unit of Life

Integral cell membrane proteins.

Cells - The Unit of Life

According to the modern concept, cell membrane is

Cells - The Unit of Life

Select the correct option: Cell membrane is selective permeable. This means that is

Cells - The Unit of Life

Integral cell membrane proteins

Cells - The Unit of Life

The molecules in the membrane that limit its permeability are the

Cells - The Unit of Life

A scientist wanted to genetically engineer a new type of corn plant that could withstand cold temperatures. He decided to try to change the composition of the plant's membrane to lower the temperature of phase transition. Which of the following membrane changes might be expected to improve the cold tolerance of the plants?

Cells - The Unit of Life

What would happen to the life of a cell if the plasma membrane ruptures or breaks down ?

Cells - The Unit of Life

Explain the association of carbohydrate to the plasma membrane and its significance.

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