mammals. 3) Slide 3: Why is the nucleus of the cell in slide 3 so large? In other words‚ what is this cell doing that requires that its nucleus be so large? (Please be specific). In eukaryotic cell in slide #3 has organelles including a nucleus containing DNA and mitochondria energy organelles .Compared to the prokaryotic cell which has the DNA in the cytoplasm smaller and simpler and doesn’t contain a nucleus or other organelles‚ it does have cell membrane. Bacteria and Archea are single celled
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Microbiology Microorganisms Most are not Pathogens Prokaryotic-no nucleus or organelles Very simplistic—like bacteria Eukaryotic-has nucleus and organelles like mitochondria Includes fungus‚ and animals Acellular-not even a complete cell Includes viruses and prions like those that cause Mad Cow disease Six main types of microorganisms Bacterium (prokaryotic) Fungus (eukaryotic) Algae (eukaryotic) Virus (acellular) Protozoan (eukaryotic) Helminth (eukaryotic) Most
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all bacteria can be stained by it‚ but in my opinion‚ when we pour ethanol over the slide to wash away the dye then only definite bacteria can retain the color whereas other species bleach. Such difference might be due to the composition of their cell- wall.
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and gives | | | |mechanical strength to plant due to presence of | | | |lignin cells. The lignified secondary wall also | | | |makes the xylem waterproof and prevent it from | | | |collapsing under
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for use elsewhere – to “sinks”- tissues in which sugars are being used or stoned. Movement occurs because cells expend energy to load sucrose actively into phloem cells near source tissues. Water follows by osmosis‚ creating a pressure gradient that favours the movement of water and sucrose sinks Stomata are open during the day so that gas exchange can occur between the atmosphere and the cells inside the leaf. Water loss is a side effect of photosynthesis The evaporation can actually be beneficial
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on populations of Gram positive and Gram negative bacteria. Bacteria have a cell wall composed of peptidoglycan that gives the wall its strength. Gram negative bacteria have and extra component of lipopolysaccharide (LPS)‚ that is stabilized with magnesium ions‚ to their cell wall that further protects them. When Gram positive bacteria are treated with lysozyme‚ the lysozyme breaks down the peptidoglycan‚ allowing the cell to rupture if it is in a hypotonic solution or change shape without rupturing
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of oxydatively cross-linked phenolics.7 Generally‚ but not always‚ suberin contains a certain amount of soluble lipids or waxes embedded into the aliphatic polymer matrix.8‚9 Suberin and embedded wax are deposited within the primary cell wall to form a secondary wall that usually appears as a lamellar structure of alternating
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thing that we have in common would be cells. In fact every living thing is composed of cells: plants‚ animals‚ bacteria etc. Cells exist in different shapes and sizes. They also differ depending on the function they have in an organism. To make things simpler‚ cells are categorized into two vast groups: Prokaryotic and Eukaryotic Cells. These two types of cells are different from each other while still sharing some similarities. Eukaryotic and Prokaryotic Cells perform the same functions in the same
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1. Ceftriaxone Sodium 1g IV Fig. 1.1 Ceftriaxone (Rocephin) It inhibits the cell wall synthesis promoting osmotic instability‚ usually bactericidal. It hinders or kills bacteria. Ceftriaxone sodium is a broad-spectrum bactericidal cephalosporin antibiotic. Ceftriaxone is active in vitro against a wide range of Gram-positive and Gram-negative organisms‚ which include β-lactamase producing strains. Ceftriaxone is indicated in the treatment of the following infections either before the infecting
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have leaves which grow towards the sun. These leaves give the plant more surface area which makes it able to absorb more sunlight. The leaves and all of the green parts of the plant’s top layer are made of a specially adapted cell. These cells have a very thin cell wall so sunlight can penetrate it easily. After this‚ the sunlight reaches chloroplasts which are plastids containing chlorophyll. This is where photosynthesis actually takes
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