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Strep Throat

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10 diapositives · 519 Views · Jul 20, 2014

(4). Strep Throat. Sam Pedersen Alanis Ciccitto. Classification of Strep Throat . Strep throat is caused by an organism called Streptococcus pnuemoniae . Kingdom: Bacteria Phylum - a member of a large group of a single cell microorganisms lacking organelles and an organized nucleus

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Strep Throat
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  1. (4) Strep Throat Sam Pedersen Alanis Ciccitto

  2. Classification of Strep Throat • Strep throat is caused by an organism called Streptococcus pnuemoniae. Kingdom: Bacteria Phylum - a member of a large group of a single cell microorganisms lacking organelles and an organized nucleus Genus: Streptococcus - 1 seeded fragment and has a spherical shape to it Species: Pneumoniae - gram-positive, cell wall absorbs the stain and makes a capsule (C.Cottman)

  3. Benefits and importance to understanding how cells reproduce • Stop strep throat at an early time before the bacteria multiplies. • Give ideas to scientists to find ways to slow down or terminate the reproduction of S. pnuemoniae. • Assist in finding a vaccination for the bacteria for children at a young age. • (1)

  4. Binary Fission • Binary fission takes place in prokaryotic organisms • Organisms whose cells are lacking a nucleus and central organelles • (1)

  5. Binary fission step 1: Replication of DNA • A replication bubble is formed • DNA strands are separated • Each strand serves as a template for synthesis of a new complementary strand • DNA is then duplicated • (2)

  6. Step 2: Growth of a cell • Cell grows considerably and increases its size • Two circular DNA strands migrate • They attach themselves to the plasma membrane in different sites • (2)

  7. Step 3: Segregation of DNA • Cell elongates and pulls apart from opposite poles. • (the cell membrane extends and pinches inwards) • This step is controlled by a group of protein that assemble near the division site • (2)

  8. Step 4: Splitting of Cells • The parent cell finally forms two daughter cells • Each cell has its own cell wall and chromosomes of its own • The daughter cells are usually identical • (2) (1)

  9. Pertinent Structures of Bacteria • Nucleoid- (not a nucleus) central region where DNA is generally confined • Ribosomes- give cytoplasm of bacteria appearance • Cell wall- maintains the cells outer shape(a round sphere shape) • Pili- hallow hairlikestrutctures that allow bacteria to attach to other cells • (3)

  10. Sources • (1)The Encyclopedia of Science. (2008). Binary fission. Retrieved From http://www.daviddarling.info/encyclopedia/B/ binary_fission.html • (2)Angert, E. (n.d.). Cornell university department of microbiology. Retrieved from http://micro.cornell.edu/cals/micro/research/l abs/angert-lab/binary.cfm • (3) (n.d.). Retrieved from http://www.cellsalive.com/cells/bactcell.htm • (4)Farabee, M. J. (2010, May 18). Life: The science of biology. Retrieved from http://www.emc.maricopa.edu/faculty/farabe e/biobk/biobookmito.html