Bacterial Morphology
The bacteria are prokaryotic organisms that are single-celled, and are found to exist as free-living and possess a microscopic size. The morphology is found to vary in the bacteria, where some of them are identified as individual organisms and the others are detected as colonies. The size and shape of the bacterial cell also represent its morphology.
Bacterial cell structure
Bacteria are single-celled, tiny creatures that may enter healthy tissues and grow rapidly. Bacteria are microscopic organisms that are tiny and unicellular. These are members of the prokaryote kingdom. They live in water, air, soil, and all-natural environments. They are used in industrial and therapeutic processes, and they support a wide range of plant and animal life. The first organism to appear on the planet. Bacteria-like creatures are the oldest known fossils. Bacteria can consume a wide range of organic and inorganic elements, and some may even survive in harsh conditions.
1. Illustrate the cell envelope for gram-negative and gram-positive bacteria.
Bacteria is a prokaryotic organism. They are unicellular and devoid of a true nucleus. That is their genetic material is not enclosed in a nuclear membrane and remains condensed in the cytoplasm. Bacteria lack the cellular organelles like golgi bodies and endoplasmic reticulum. They divide by the mode of asexual reproduction, by the process of binary fission. The bacteria divides to form two identical daughter cells.
The cell envelope is referred to the combined layers of the cell membrane, cell wall and the outer membrane. The cell membrane is also referred to as the plasma membrane. It separates the interior of the bacterial cell from the external environment. The cell wall consists of peptidoglycan that varies in quantity in Gram-positive and Gram-negative strain. The peptidoglycan layer in the cell wall of Gram-positive bacteria is thicker which causes retention of the Gram stain. For example, Staphylococcus aureus. On the contrary, the thinner peptidoglycan concentration of the Gram-negative bacteria makes it unable to retain the Gram-stain. For example, Escherichia coli.
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