Question

The living substance of cell, was named sarcode by
A. Corti
B. Dujardin
C. Lamarck
D. Dutrochet

Answer 1

Cell is always defined as a structural and functional unit of life. All the living reactions are performed in the cell and perform metabolism. Metabolism is defined as the total sum of the chemical reactions that occurs inside the living body or living cell. The living material inside the cell is its protoplasm.

Complete answer:
Protoplasm was first coined by purkinje in 1839. It is the fluid that is living in nature and is present as a fluid substance of the cell. Protoplasm remains enclosed by plasma membranes. Protoplasm is usually defined as a primary living substance. All the cell organelles present in the cell enclosing the nucleus is termed as protoplasm.
Now let us see about the given options:
Corti :- he was famous for his discovery of the organ of corti. This organ is present inside the ear. Organ of corti helps in the transduction of sound waves into neural signals. Thus, this option is not correct.
Dujardin :- he was the one who discovered protoplasm and named it sarcode . Later the purkinje coined the term protoplasm. The protoplasm is defined as the living substance of the cell. Thus, this option is correct.
Lamarck: The gave the theory of use and disuse of the organs. The use of organs leads to more and more development. He gave an example of the long neck of a giraffe . Thus this option is not correct.
Dutrochet: he described the processes of osmosis, respiration and also cell biology. He also discovered embryology and the effect of light on the plant. Hence,this option is not correct.

Our required answer is B ) Dujardin.

Note: Cells were first discovered by Robert Hooke in 1665. He observed the cells in the slice of cork with the help of a primitive microscope. Leeuwenhoek in (1674), discovered the free living cells in pond water for the first time. Robert Brown in 1831 discovered the nucleus in the cell.