Flagellum

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  • Direct Motion Lab Report

    Goals E. coli is a type of bacteria that sense and swim towards sugar, amino acids, pyrimidines and electron acceptors. Thus, the goal of this experiment was to determine whether E. coli has a direct motion or random motion when a chemoattractant (glucose) was present. This was done by observing the velocity before and after the chemoattractant and by making Log-Log Plot. Theoretical Chemotaxis refers to the ability of organisms to move in response to the presence of a chemical. The movement of organisms could be either attractant in the same direction as chemoattractants , or it can repel the chemoattractant. Direct motion is defined when an organism move with regard to a reference point in a followed pathway. However, bacteria might also move randomly as a result of their collision with other fast moving particles in various environments. When there is a gradient present, E. coli moves to the chemical emitted from the chemoattractant. The attracted chemical binds to the chemoreceptors known as methyl-accepting chemotaxis proteins in the cell membrane of E. coli. E. coli compares recent and previous concentrations over periods of time. The methyl-accepting chemotaxis protein receptors in E. coli uses cytoplasmic signaling proteins to control flagellar rotation and sensory adaptation. Since E.coli monitores their environmental concentration gradient, we hypothesized that E. coli moves in a favorable direction toward glucose chemoattractant. As a result, we expected…

    Words: 924 - Pages: 4
  • Case Study: Spermatozoa And Its Arrival To The Egg

    DISCUSSION Spermatozoa and its Arrival to the Egg Before embarking in the complexity of CatSper channels, the particular characteristics of sperm and its movement towards the egg in female that allows for fertilization should be addressed. Spermatozoa are differentiated motile cells that have two main structures: the head, which houses packed DNA, and the flagellum, the motility portion that transports the sperm genetic information to the egg (1). Within the spermatozoa head both a vesicle…

    Words: 1425 - Pages: 6
  • Pathogenesis Of Bacteria

    The role of this structure in the pathogenesis of the bacteria is of high medical importance as it helps the bacteria to be propelled or display from one location to another carrying the infection to other areas fast, an example is the Escheria Coli, which can propel from the urethra to the bladder, known as the most common causes of urinary tract infection (UTI’s), and some other as flagellum cannot be seen under microscope without stain, helps to differentiate them using specific antibodies…

    Words: 1437 - Pages: 6
  • Intelligent Design Argument

    Similar traits, bone structures, and chromosomes are some of the most known pieces of evidence to support the theory of evolution. The main evidence that intelligent design can provide is how the bacterial flagellum is ordered perfectly to be able to function. Supporters of intelligent design say that the structure is so perfectly made that it cannot be evolved and it is designed. It has been said that, in the case of the bacterial flagellum, there are similar structures that could have led the…

    Words: 816 - Pages: 4
  • Explanations: Propeller Crab

    I also knew because it was green and has a distinguishable feel. It feels kind of crusty and is very fragile. Bacteria 1.) Flesh-Eating Bacteria-I knew that this was bacteria because it was the rod-shape like bacteria. It also had pili and a flagellum. It has all the parts that are needed for a regular bacteria cell meaning that it is bacteria. [Plus, it’s got it in its name ;)] 2.) Salmonella-I knew this was Salmonella because it was rod-shaped gram-negative bacteria. Gram-negative…

    Words: 411 - Pages: 2
  • Intelligent Design Theory

    claims that such changes would be unnecessary and maybe even hinder the structure of the mousetrap. “An irreducibly complex system has no function whatsoever until all the parts are in place. If you were to take one part away from the mousetrap it would no longer function” (Behe, 1999). Bacterial flagellum, a microstructure which attaches itself to the tail ends of some bacteria; is also, according to design theorists, another example of irreducible complexity. The flagellum attaches itself to…

    Words: 1915 - Pages: 8
  • Flagella Research Paper

    cause of common infections, chronic gastritis, peptic ulcer , persistently colonizing the gastric mucosa of over 50% global population. It is a significant risk factor of gastric cancer(23). It is classified as group 1 carcinogen by WHO. Non motile mutants lacking flagella are unable to establish persistent infection in animal models. Consists of 2-6 unipolar flagella.Dysfunction of flagellar biogenesis have a strong impact on motility and infection. Vibrio cholerae: gram negative aerobic or…

    Words: 1460 - Pages: 6
  • Conflict Between Science And Religion Essay

    One of his main examples comes from the bacterial flagellum, which features an extraordinary organic rotary motor. Behe argues that all parts are necessary for the flagellum to operate, so it is reasonable evidence to believe that the flagellum was intentionally designed by a higher power. Unfortunately, Behe is guilty of inserting personal bias to scientific interpretation, and he violates both repeatability and falsifiability in doing so. His argument may carry weight from a personal…

    Words: 1345 - Pages: 6
  • Differences And Similarities Between Prokaryotes And Eukaryotes

    Their size varies 10-100nm.Unlikely prokaryotes, which have a certain shape, eukaryotes do not really have a specific shape that is defined. Organelles are the things that make eukaryote cells to be eukaryote. Eukaryote cells consist of: mitochondria, Golgi, ER, vacuoles, chloroplasts, lysosomes, nucleus, etc. The organelles that a cell has might vary from the type of the cell. Unfortunately, not all the parts of the cell might be observed under the light microscope because only the large…

    Words: 785 - Pages: 4
  • Similarities And Differences Between Prokaryotic And Eukaryotic Cells

    up of cytoplasm. In the Eukaryotic cell there is a large number of membrane bound organelles found in the cytoplasm such as endoplasmic reticulum, lysosomes, Golgi apparatus, Nucleus and mitochondria. These are not present in the prokaryotic cell, the prokaryotic cell has no membrane bound organelles. Ribosomes are present in both cells but the ribosomes of a eukaryotic cell are larger and much more complex than those of a prokaryotic. A cell wall is found in certain types of eukaryotic cells…

    Words: 1133 - Pages: 5
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