A prokaryotic cell is a single-celled organism that lacks a true nucleus and membrane-bound organelles. Examples include bacteria and archaea.
What are the key features of a prokaryotic cell?
Key features of a prokaryotic cell include:
Lack of a true nucleus
Lack of membrane-bound organelles
Circular DNA as the genetic material
Ribosomes for protein synthesis
Cell wall for structural support
What is the structure of a bacterial cell?
A typical bacterial cell consists of:
Cell wall
Cell membrane
Cytoplasm
Circular DNA (nucleoid)
Ribosomes
Plasmids (small circular DNA)
What is a virus?
A virus is an infectious agent that can only replicate inside the living cells of other organisms. Viruses consist of genetic material (DNA or RNA) surrounded by a protein coat.
What are the key features of a virus?
Key features of a virus include:
Lack of cellular structure (no cell membrane, cytoplasm, or organelles)
Contain only genetic material (DNA or RNA) and a protein coat
Require a host cell to replicate and reproduce
Can infect a wide range of host cells, including bacteria, plants, and animals
