Question

State whether the following statement is true and false.
The modern model of plasma membrane structure was first described in 1986.
A. True
B. False

Answer 1

Hint: The modern model of plasma membrane structure is also known as the fluid mosaic model which is projected by Singer and Nicolson in 1972. This model is the most acceptable model of a plasma membrane.

Complete answer:
The Fluid-Mosaic Membrane Model of membrane structure was proposed in 1972. It was grounded on thermodynamic principles of organization of membrane lipids and proteins and available proof of asymmetry and lateral flexibility within the membrane matrix. After over forty years, this basic model of the cell wall remains appropriate for describing the essential nano-structures of a variety of intracellular and cellular membranes of plant and animal cells and lower forms of life. In the superseding years, however, new evidence has recognized the importance and roles of specialized membrane domains, such as lipid rafts, etc. In explaining the macrostructure, dynamics, and functions of cellular membranes as well as the roles of membrane-associated cytoskeletal fences and extracellular matrix structures in limiting the lateral diffusion and range of gesture of membrane components. In updated versions of the model, more importance has been laid on the mosaic nature of the macrostructure of cellular membranes where many protein and lipid components are limited in their rotational and lateral motilities in the membrane plane.

Hence, the given statement is false. So, the correct option is 'False'.

Note:
The newer data build on the foundation of the original model and add new layers of complexity and hierarchy, but the concepts described in the original model are still applicable today.