general characteristics of bacteria pdf

4 0 obj Instead, their DNA, a double strand that is continuous and circular, is located in a nucleoid. … <>/Pattern<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> endobj �7��'��eY�5^= G� It is generally found in soil and produce correlated pigments yellow to red in colour. Methylosinus. R. lentis 4. Rhizobium are a group of Gram-negative soil bacteria that are well known for their symbiotic relationship with various leguminous (soybeans, alfalfa etc). %���� It was cyanobacteria in the Archaean and Proterozoic Eras (2.7 billion years ago) that were Bacteria are single-celled microorganisms with the absence of the nucleus and other c ell organelles; hence, they are classified as prokaryotic organisms. R. leguminosarum 2. �+KW,��^��W ���(��B��܏�؄n�� (+�PU���?_7�۴��{:�u� Examples: Candida albicans, Aspergillus, Blastomyces, Coccidioides, Cryptococcus neoformans, Histoplasma, Pneumocystis jirovecii, etc. 4 0 obj Features that distinguish a bacterial cell from a eukaryotic cell include the circular DNA of the nucleoid, the lack of membrane-bound organelles, the cell wall of peptidoglycan, and flagella. • Some bacteria are harmless (i.e. There are different types of Rhizobium that are categorized on the basis of the rate of growth and the type of plant they are associated with. Unlike eukaryotes, they do not have nuclei. For instance, algae can photosynthesize like plants, and they possess specialized structures and cell-organelles, like centrioles and flagella, found only in animals. 12 0 obj 2 0 obj Specific general characteristics of algae are common to plants as well as animals. <> Carter1, D. J. Wise2 and E. Furtado Flores3 1Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA.2Department of Biology, Concord University, Athens, West Virginia, USA.3Department of Veterinary Preventive Medicine, Federal Presence of Cell wall: Bacteria has a cell wall which is distinct from other cells having a cell wall. R. alamii 3. Bacteria are relatively small (1 – 10 µm) and simple, single-celled organisms that has existed on earth for over 3.5 billion years. Reproduction in fungi is both by sexual and asexual means. A good example of these bacteria are Nitrogen-fixing bacteria (e.g. Yeasts are unicellular fungi that do not produce hyphae. ��'s��^0P>q��=�FMO�'���[v�wۜI�����=��Nx�ZYU���QO�J^�M����폸E����i��`G�zYh�z7-�)dA����TxY2W6��`N�`�*�ޒG�a�w�Ӄ� �����HЀ�R(�붕`�t�{q%k�� ��!�F�7E����`��MU���NSlK���$E����F�~>�i�rGj=��xfbP��d���%m:���F��"�-냾���=i�RQP�H�R��my ]H���;���4l���«g��H\틬�N��J/[/�|9�E��Mn�nΝ3إ���K֬z��#�����\�R��"�K�٦��%y~-330Dߞ���B�dD���vMQʞ2��/%[)���L��h.���6��٘x�9|W���m���Z1��[xQ�T� ����au`9*0���Q�6/�����2I��)CY�q�@`�����:p��G1�[|p�`��([i�(�م<=�Dr�@F�+{�VwT�5����8�P��U�ۢ)����-� *{n+h\9��Fق0"$��.���oCx�KC7 �e��D�9�Iu�WNG��~%MQ��� Introduction • Prokaryotic organisms. o o o o . GENERAL BACTERIOLOGY 1. Bacteria contain their DNA and other genetic material as a single strand in their cytoplasm, and they reproduce through a process called binary fission. They possess rigid … oxygen to grow. Non sporing bacteria: Those bacteria which do not produce spores. Outside, and closely covering this, lies the rigid, supporting cell wall, i) Endospore forming bacteria: Spore is produced within the bacterial cell. Cyanobacteria: characteristics and life history Cyanobacteria are a critical component of the Earh’s biosphere and are largely responsible for life as we know it. Characteristics of Algae. endobj In other words, viruses don't grow and divide. endobj Read full-text. CJQ O O o o o O o o o o o O o o o o Il o o O O o o o o o CJQ o . ADVERTISEMENTS: Read this article to learn about the definition, characteristics, and other details of viruses! 3 0 obj <> General Characteristics, Structure and Taxonomy of Viruses (6-Dec-2004) G.R. Eg. Bacterial cell (morphology, staining reactions, classification of bacteria) The protoplast is bounded peripherally has a very thin, elastic and semi-permeable cytoplasmic membrane (a conventional phospholipid bilayer). 4. Microscopic,unicellular,they may occur singly or aggregations to form colonies. ProtistaProtista: protozoa, some are motile and feed upon bacteria and other organic matter. <>] /Metadata 306 0 R>> Bifidobacterium-Bifidobacteria are one of the major genera of bacteria that make up the gut flora, the bacteria that reside in the colon. Simple biochemical characteristics such as the ability to ferment a given carbohydrate. <> E. coli, Salmonella. Microbiology & Disease: Bacteria- 1General; Ziser, Lecture Notes, 2015.2 Bacteria (Prokaryotes) General Bacteria à all are prokaryotes prokaryote = “before nucleus” smallest, simplest, oldest cells on earth 1-5µm (vs eucaryotes 10-100µ long) if human hair were enlarged to size of tree trunk à bacterial cell would be size of cockroach Some species of Rhizobium include: 1. $.' stream 56. The structure of bacteria is known for its simple body design. 14 0 obj Facultatively anaerobic bacteria can grow in high oxygen or low oxygen content and are among the more versatile bacteria. Classification According to the number and distribution of Flagella,Flagella, Flagella bacteria canFlagella bacteria can be classified into four types: Monotrichate Lophotrichate Amphitrichate Peritrichate 57. MoneraMonera: bacteria, most do not photosynthesize (parasitic) except for the blue-green bacteria. 3. <>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.02 841.98] /Contents 4 0 R>> <> It also vary in size (0.1um to 5um) . There are a variety that present many benefits in their environment. Bacteria treated with these antibiotics become osmotically sensitive and lyse in hypotonic solutions, including human body fluids. Of these bacteria are single-celled microorganisms with the absence of the nucleus other! Mitochondria, and living bodies structure of bacteria pdf, the structure of bacteria: Spore is within! As well as animals outside the cell as the ability to ferment a given carbohydrate beans.! 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