Bacterial cell biology and growth kinetics

Published on March 30, 2023   49 min

A selection of talks on Infectious Diseases

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Bacterial Cell Biology and Growth Kinetics. I am Dr. Sanchita Mitra, MD microbiology, working as a consultant microbiologist at LV Prasad Eye Institute, Hyderabad, India.
Bacteria Anatomy and Types of Microbes.
Microbes are microscopic organisms composed of single cells or a cluster of cells ubiquitous in their presence and are too tiny to be seen by the naked eye unless they form a colony. Microbes are either prokaryotes, eukaryotes, viruses or prion proteins. Prokaryotes are mainly characterized by their small cell size and absence of nuclear membrane. Prokaryotic cells measure in the range of 0.2 to 2 μm in diameter and 1 to 6 μm in length. Usually, a single nucleus arranged as a circle in bacterial cells lies freely in the cytoplasm, and the region where it lies is called the nucleoid. Membrane-bound organelles are usually absent, with only some bacteria possessing such membrane-bound structures like chromatophores. Prokaryotes include different kinds of bacteria, like gram-positive and gram-negative bacteria, mycoplasma, chlamydia and spirochaetes. Eukaryotes are characterized by large cell size, double layered nuclear membrane surrounding the nucleus and membrane-bound cell organelles like mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes and chloroplasts. Eukaryotes include algae, protozoa, fungi and slime molds.