EVERYDAY SCIENCE

Detailed explanation-1: -Prokaryotic cells are single-celled microorganisms known to be the earliest on earth. Prokaryotes include Bacteria and Archaea. The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis. A prokaryotic cell consists of a single membrane and therefore, all the reactions occur within the cytoplasm.

Detailed explanation-2: -Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea. Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall.

Detailed explanation-3: -Bacterial cells are prokaryotic. They possess a ‘nucleoid’, an irregular-shaped region of the cell that contains circular DNA. Moreover, membrane-bound cell organelles are also absent in them.

Detailed explanation-4: -Bacteria do not have a well-defined nucleus. It lacks cell organelles. It has single circular genetic material in which only one chromosome is present. Thus bacterial cell is considered as a prokaryotic cell.

Detailed explanation-5: -The bacteria are the oldest and simplest living organisms, and all of the bacteria are “prokaryotes, ” meaning that they do not have a true membrane-bound nucleus as eukaryotes do. [Prokaryote is derived from Greek, meaning “before nucleus"; eukaryote means “true nucleus."]