Question

The presence of cell membrane but absence of a true nucleus is the characteristic of __________.

• A. Virus
• B. Bacteria
• C. Amoeba
• D. Planaria
• E. Sponge

Answer 1

The correct option is B Bacteria

Prokaryotes lack a true nucleus with well defined nuclear membrane and other membrane-bound organelles. They are unicellular organisms. They include both the bacteria and the archaea, which appear to be only distantly related to bacteria.They lack membrane-bound organelles like mitochondria, Golgi complex. They also lack a true nucleus. Instead, they have nucleoid or incipient nucleus. Nucleoid is an undifferentiated, unorganised, fibrillar nucleus without any limiting membrane. Examples of bacteria include E. coli, cyanobacteria etc.