Question

An example of prokaryotic cell is
A. Green algae
B. Fungi
C. Bacteria
D. Bryophyte

Answer 1

Hint: Prokaryotic cell as per the name suggests, pro means “before” while karyon means “nucleus” or any genetic material. These are the primitive cells lacking membrane-bound organelles like Golgi complex, mitochondria. These cells do not contain true nuclei.

Complete answer:
Prokaryotic cells are single celled/unicellular organisms. The prokaryotic DNA lacking nuclear envelope is mostly located in the center and is known as the nucleoid that is “nucleus like”. The entire DNA is in circular form which is known as plasmid. Ribosomes are present for protein synthesis. Fimbriae and pili are present for the attachment. Prokaryotes are surrounded by the outer covering known as the plasma membrane which separates the interior of a cell from its ambient surroundings. Inside the plasma membrane, a cytoplasm consisting of the jelly like cytosol plus suspension of cellular structures is present. A Bacterium is a well-known prokaryotic cell. Examples include E.coli. Thus, the correct answer is 'Bacteria.'
On the other hand, Green algae, fungi and bryophyte are eukaryotes.

Hence, the correct answer is option (C).

Note: In addition to bacteria, the blue - green alga which is also known as the cyanobacteria constitute the main group of prokaryotes. In prokaryotes, the fraction of internal structures which are well distinguished is very less as compared to the eukaryotes which are characterized by presence of various well differentiated organelles. Moreover, prokaryotes are unicellular organisms while eukaryotes are multicellular organisms. Also, archaebacteria form part of the other prokaryotic domain. These are the primitive forms of life existing in extreme conditions.