Question

Who proposed crystallo-colloidal nature of protoplasm
A) Fischer
B) Fromann
C) Velton
D) Hanstein

Answer 1

Hint:Crystallo-colloidal theory of protoplasm considers the protoplasm to be a polyphasic colloidal system.

Complete answer:
Fischer proposed the Crystello-colloidal theory of protoplasm where he states that the protoplasm or living matter is a polyphasic Crystello-colloidal complex that possesses all the properties required to declare a cell living and are found in living organisms, both multicellular and unicellular.
Protoplasm is a translucent matrix present within the cell and is bound by the plasma membrane.
It's content is both crystal and colloidal in nature.
The presence of mixtures that contain sugars, salts, acids, bases form the crystalloid part.
 The proteins and lipids form the colloidal part.
Therefore it is called polyphasic as it has two different phases.
The protoplasm is abundant in water and a number of solutes remain dissolved and suspended in it.
It contains the genetic material of the cell and also controls all the functions performed.
The cytoplasm (parts outside the nucleus) and the nucleoplasm (parts inside the nucleus) together form the protoplasm.
These form the living system of the cell.

Hence the correct answer is option (A.) Fischer.

Note: Dujardin in 1835 discovered the protoplasm for the first time. J.E. Purkinje coined the term protoplasm.