In this article we will discuss about the structure and components of bacterial cell. Structure of Bacterial Cell: Bacterial cells (prokaryotic cells) are structurally much simpler than eukaryotic cells and the two cell types are compared in Table 3.2. They consists of various cell surface structures, cell wall, plasma membrane, many cytoplasmic inclusions, and the bacterial chromosome (nucleoid). Except some, [...]
In this article we will discuss:- 1. Definition of Plasmids 2. Physical Nature and Copy Number of Plasmids 3. Properties 4. Incompatibility 5. Types 6. Replication 7. Plasmid Curing 8. Use of Plasmids as Coning Vectors. Definition of Plasmids: In addition to bacterial chromosome (nucleoid), bacterial cells normally contain genetic elements in their cytoplasm. These genetic elements exist and replicate [...]
The following points highlight the eight important cytoplasmic inclusions found in bacteria. The cytoplasmic inclusions are: 1. Ribosomes 2. Polyphosphates 3. Poly-β-hydroxybutyrate 4. Glycogen 5. Gas Vacuoles 6. Magnetosomes 7. Sulfur Globules 8. Carboxysomes. Cytoplasmic Inclusion # 1. Ribosomes: Ribosomes (Fig. 5.20) in bacteria (prokaryotes) are small granular bodies of 10-20 nm in diameter freely lying in the cytoplasm and [...]