Test Preparation on Cell: Structure and functions –I Biology Test Series for NEET - 2020

(a) M.J. Schleiden and T. Schwann (1838 – 39) proposed
cell theory.

(d) Viruses are not applicable to cell theory. They are made
up of proteins and one of nucleic acids i.e., DNA or RNA.
So they lack protoplasm, the essential part of the cell.

(b) The prokaryotic cells do not have nuclear membrane
while eukaryotic cell have well organised nuclear
membrane.

(a) In all living cells water forms 50-80% of total cell
contents.