Cell wall

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  • Bacterial Cell Wall Lab Report

    Structure of the Bacterial Cell Wall Bacterial cells differ from mammalian cells due to highly developed cell walls outside the cytoplasmic membranes that provide structural integrity and shape to the cell. Bacteria live in dilute aqueous environments, which causes an intracellular pressure equivalent of 10-25 atm. Without the structural support of the cell wall, the cell is susceptible to lysis and osmotic rupture due to osmotic rupture due to turgor pressure. Figure 1: Comparison between gram-positive bacterial cell walls and gram-negative bacterial cell walls. Structural differences in the bacterial cell walls cause bacteria to be subcategorized into gram-positive and gram-negative. Gram-positive cell walls (e.g. Bacillus subtilis, Streptococcus…

    Words: 990 - Pages: 4
  • Osmosis And Diffusion Lab Report

    out of cells can also be due to active transports that use energy from ATP to move substances through the cell membrane against the concentration gradient, from regions of low concentration of that substance into regions of higher concentration. In this part of the lab, the students will examine the diffusion of solute through dialysis tubing, a selectively permeable membrane, to observe why the size of the pores in the dialysis tubing determines which substances can pass through the membrane.…

    Words: 727 - Pages: 3
  • Fungal Entomogenesis Of Chitin

    and some algal cell walls, in bacteria and in the exoskeleton of invertebrates (Li and Roseman 2004). Lipochitooligosaccharides or Nod factors produced by rhizobia essentially consist of a chitin backbone of 3–5-N-acetylglucosamine residues with N-acyl group attached to the non-reducing sugar and a variety of additional substituents attached to the glucosamine residues (den Hartog et al. 2003). Bacterial peptidoglycan, a polymer of β-1,4-linked N-acetylglucosamine and N-acetylmuramic acid…

    Words: 959 - Pages: 4
  • CRP Transgenic Mice: A Case Study

    Biological functions: The main biological functions for CRP to determine via its ability to identify pathogens and injured cells of the host and mediate their elimination via activating the complement system and phagocytic cells (Brundish and Baddiley,1968 ; Weiser et al., 1997). CRP binds to microorganisms and mediates their killing to more recent observations of protection against bacterial pathogens in CRP transgenic mice. The most significant evidence has supported the notion that CRP plays…

    Words: 1133 - Pages: 5
  • Xylem Vessel Length In Woody Plant

    arise. A xylem is one of two types of complex vascular tissue that originate from the procambium. The xylem resides in the root and its role within plant is to conduct water and minerals. It is composed of two types of sclerenchyma conducting cells, tracheids and vessel elements, as these trachery elements mature they go through anatomical changes, most noticeably, elongation. As Xylem tissue further mature the formation of a secondary, water impermeable wall is formed through secretion. This…

    Words: 952 - Pages: 4
  • Biomedica Trull Animal Testing Essay

    Using scientific data from tests that the physicians and scientists at numerous universities have conducted, you are able to determine how a product would work on an actual person. This article appeared in the Wall Street Journal, so her audience consists of those reading for business and financial news. In Trull’s case, this is considered business news because it focuses around business’s that test on animals. Trull pushes to raise awareness about all the success that testing on animals has…

    Words: 1550 - Pages: 7
  • Exploring The Relationship Between Pectinase And Enzyme Industry

    Pectinase is one of the widely used enzymes in the food and enzyme industry. It is an enzyme group that comprises polymethylgalacturonase (PMG), polygalacturonase (PG), and pectin lysase. These enzymes are used in degradation of pectic substances, which involves deesterification and depolymerization reactions. Pectic substances are the major structural component found in plant’s cell wall and lamellae. Types of pectic substances include protopectin, pectin, pectinic acid, pectic acid and…

    Words: 964 - Pages: 4
  • Solanum Tuberosum Case Study

    This is to prevent the growth of microbial contamination and also to prolong the food’s shelf life. Moisture loss observed in potatoes is because of the intracellular spaces contain in its structure or its porosity. A study conducted by Wang. N and Brennan. J (1993), stated that there was a linear relationship between porosity and moisture content. According to Singh. F et. al (2014), one of the most significant effects on the porosity in potatoes is by the dehydration process. The removal of…

    Words: 1213 - Pages: 5
  • Agar Cube Diffusion

    Research Question What is the effect of surface area on volume ratio over rate of diffusion of pigment regarding the agar cube, measure by percentage volume of diffusion through time? Hypothesis The experiment involves the use of agar cubes. If the cells of these cubes desire a great surface area to volume ratio in order to carry out their needs (exchanging materials with the environment, receiving oxygen, getting rid of waste products), the SA:V ratio will be larger. Consequently, the rate of…

    Words: 1210 - Pages: 5
  • Nothapodytes Nimmoniana J Graham Case Study

    Preliminary qualitative chemical tests show the presence of alkaloids, carbohydrates, saponins, steroids, terpenoids, phenolics, coumarins and fixed oil, etc.18 Desorption electrospray ionization was employed for fast and direct ambient detection of the anti-tumor drug, camptothecin, and its derivative, 9-methoxycamptothecin in Nothapodytes nimmoniana J. Graham. Different parts of the plant such as leaves, stems and bark were examined. The …

    Words: 731 - Pages: 3
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