BACTERIAL MORPHOLOGY CONTD...
2.) Cytoplasm: It refers to internal matrix of cell inside the cytoplasmic membrane. Prokaryotic cytoplasm lacks membrane bound structures . The cytoplasmic matrix is largely watered which dissolves proteins, amino acids, sugars, nucleotides, salts, vitamins, & ions. It also contains certain bacterial structures like inclusion bodies, nucleoid, plasmids.
A) Ribosomes: They are r-RNA protein bodies which give granular appearance. Proteins are synthesized in ribosomes & prokaryotic. Proteins are synthesized in ribosomes & prokaryotic ribosomes aren't bound to endoplasmic reticulum. Ribosomes of prokaryotes are called 70S(Sedimentation Coefficient) & are composed of 2 units(50S & 30S). Antibiotics such as Streptomycin &Tetracycline prevents bacterial ribosomes from carrying out protein synthesis.
B). Nucleoid: It is an irregular shape region where prokaryotic chromosomes are located. The nucleoid doesn't contain membrane as eucaryotic cells. The bacterial chromosomes is a closed loop of DNA that contains the hereditary information or genes of the cells.
C) Plasmids: They are extra chromosomal DNA molecules usually circular & replicate independently of the chromosomes or they may be integrated with chromosome. They are not required for host growth & reproduction but are significant in disease process. Some plasmids process genes for toxin substances & may carry genes for drug resistance which can spread throughout the population.