Prokaryotic Microbes

Introduction The purpose of this experiment was to determine the size of prokaryotic microorganisms compared to eukaryotic cells. Students use the oil immersion microscope to amplify microorganisms and compare its size with the size of eucaryotic cheek cells. Laboratory results make it possible to compare and compare cell sizes of eukaryotic and prokaryotic organisms, an essential skill to use microbiology-based laboratories. Microbiology is a study of microscopic organisms also known as microorganisms. Microorganisms include bacteria, fungi, protists and autotrophs.

Life is thought to have appeared on the earth about 4 billion years ago. The internal symbiosis theory believes that some of the organelles in today's eukaryotic cells were once prokaryotic microorganisms. In this theory, the first eukaryotic cell can be an amebocyte containing nuclei formed by the cytoplasmic membrane that is acquiring a nutrient by phagocytosis and being extruded around the chromosome. Some of these ameboid organisms have procaryotic cells and then they survive and form symbiotic relationships within their organisms. Mitochondria are formed when ingesting bacteria capable of aerobic respiration, and chloroplasts are formed by ingesting photosynthetic bacteria. Since they have no advantage for host cells, they ultimately lose the cell wall and most of the DNA. Mitochondria and chloroplasts can not grow outside host cells

Prokaryotic microorganisms are unicellular microorganisms that lack nuclei. There are two types of prokaryotes: fungi (Eu bacteria) and archaebacteria (archaea). Bacterial cell walls are composed of polysaccharides called peptidoglycans, but some bacteria lack cell walls. Bacteria without cell walls are called mycoplasma. The archaeal cell wall lacks peptidoglycan, but it consists of other polymers. The only kinds of microorganisms hidden from Leeunwenhoek and other early microbiologists are viruses, viroids and prions, which are much smaller than the smallest prokaryotic microorganisms and are not visible with light microscopy. The virus was discovered only after the electron microscope was invented in 1932.

Bacteria, protists and archaea belong to the world of microorganisms - mostly single cell organisms. Bacteria are prokaryotes, ie organisms with DNA not surrounded by nuclei, protists are eukaryotes with bounded nuclei. Archaebacterium is the first ancient organism recognized in the late 1970s, prokaryote, but it is different from bacteria. They are a group of extremists who can survive in the most harsh environmental conditions. Despite their small size and single cell structure, bacteria show a surprising range and features and behavioral complexity. Along with the founder, they are the earliest living organisms on Earth. Cyanobacteria, also known as cyanobacteria, can be traced back to 3 billion years ago to promote the formation of the Earth 's atmosphere through the development of photosynthesis.