![]() ![]() These organisms again can be divided into various kinds: Some examples are Clostridium maximum, Sarcina auranatica, etc.īacilli are rod-shaped, and after their cell division, they can occur in singular or multiple cells form. These occur in the form of 8 cells group and usually exist in skin and large intestine. Staphylococcus aureus and Staphylococcus haemolyticus are few examples. Two primary examples of tetrads are Micrococcus spp and Pediococcus.Ĭells of this type of bacteria are organised in a cluster form like grapes. These bacteria show four-cell arrangement and division of cell takes place in two planes. Streptococcus pyogenes, Streptococcus bovis, Streptococcus mutans, etc. Streptococcus are gram-positive, aerobic, non-motile bacteria which are responsible for many diseases. These are connected at a consistent level and organised in the form of a chain. Gram-Negative: Enterococcus spp, Streptococcus pneumonia, etc. ![]() Gram-Positive: Moraxella catarrhalis and Neisseria spp. These exist as one spherical shaped cell.Īfter Division of Cell, the Cells of Diplococcus are Ordered in Pairs. Its cell wall can be gram-positive having a thick layer of peptidoglycan or gram-negative if the cell wall has a thin layer of peptidoglycan.ĭepending on the Cell Arrangements of Cocci, These Bacteria can be Further Divided into Multiple Types like: Moreover, they can be oval, round, bean-shaped or elongated. They can be one, or more than one in a group of two, four, eight, etc. ![]() So, take a look at the different bacteria shapes:Ĭocci bacteria shape is spherical. The various bacteria shapes help in classifying them. The variety in shape and morphology of bacteria cell is because of modification in its thickness and polymer configuration. This polymer is made up of sugars where alternating N – acetylglucosamine is joined with amino acids and N – acetylmuramic acid peptide chain. Bacteria shape also affects a lot of other traits like mode of nutrition, motility, etc.Īs mentioned earlier, the bacterial cell wall is constructed with peptidoglycan. The morphological attributes are an essential factor for the evolution and adaptability of a bacterial cell. Morphology not only indicates the shape of a bacterial cell but also determines its pathogenicity. This microorganism can be chemoautotrophs, photoautotrophs or parasites. The cells of bacteria may consist of external attachments like flagella, cilia, etc. The main component of the cell wall of a bacterium is peptidoglycan or murein.ĭifferent shapes of bacteria form a characteristic feature of a particular bacteria species. The diameter of each bacteria cell is ~1µm (10^-6 m).Ī bacteria cell is covered by a rigid cell wall which helps in providing constructional integrity. In comparison to human cells, bacterial cells are ten times smaller. Notably, it is not wrapped for the formation of chromatin, like in the case of eukaryotic cell. The DNA of bacteria is found in cytoplasm. It also lacks membrane-bound cell organelles. There are different bacteria shapes, sizes and arrangements. To know more about this microscopic organism take a look at the following features of the same: An essential characteristic of bacteria is that it can grow in extreme conditions such as snow, oceans, hot springs, etc. They are single-celled, prokaryotic organisms which are found everywhere. So, you can refer to the below mentioned important notes of biology for NEET shapes of bacteria for fast and adequate revision. Since you have just a few weeks left before the examination, revising the chapter top to bottom can be difficult. As a part of the NEET curriculum, it is considered one of the most vital topics where various bacteria shapes cover the maximum part. Shapes of Bacteria: Important Notes on Biology for NEETīacteria are the most abundantly existing microorganisms on Earth. ![]()
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