Bacteria reproduces by most commonly occurs by a kind of cell division called binary fission. Binary fission results in the formation of two bacterial cells that are genetically identical. 6. The Archaea these microbes are prokaryotes, meaning that they have no cell nucleus or any other membrane-bound organelles within their cells. 7.
Unit 4222-265 Causes and spread of infection (ICO2) Understand the causes of infection 1. The differences between bacteria, viruses, fungi and parasites Bacteria belong to a group of single celled microorganisms which are classified as prokaryotes i.e. they do not have membrane bound organelles. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid and the cell is surrounded by a cell wall an outer covering that protects the bacterial cell and gives it shape. Viruses are infectious agents, often highly host-specific, consisting of genetic material surrounded by a protein coat.
LB+:There should have been bacterial growth but no blue colonies because there was an anti-biotic acting against it. LB-: Nothing should have happened because there was no bacteria and plasmid given. 3. One of the plates should have no growth and that was the LB- plate. This happened because the plate was given no bacteria or anything to start growth.
A plasmid is a spherical self-replicating DNA molecule that is not actually a part of the bacterial cell but can integrate itself into the bacterial chromosome. While it is not required for the living and reproduction of the bacterial cell plasmids can provide advantages in stressful environments such as the ability to break down X-Gal in this experiment. Procedure 1. Mark one sterile 15-mL tuba "+pBLU;" mark another "-pBLU." (Plasmid DNA will be added to +BLU tube; no will be added to –BLU tube.)
Not enclosed in a special nuclear membrane. Appear in several shapes; bacillus rod-like, coccus spherical or ovoid, spiral corkscrew or curved star-shaped or square. Individual bacteria may form pairs, chains, clusters, or other groupings; such formations are usually characteristic of a particular genus or species of bacteria. Bacteria grown in a given time in media are called a culture. A pure culture is often a clone, a population of cells from a single
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Evidence-Based Practice and Applied Nursing Research Task Two Donald M. Jacobsen Western Governors University Types of Sources of Evidence AAP/AAFP, 2004 This is a filtered source, because it is a journal found directly on the AAP website. The AAP website does not store a database of general resources. Block, 1997 This is an unfiltered source. The journal resides on OvidSP, which contains health sciences and biomedical literature on a variety of topics. Kelley, Friedman & Johnson, 2007 This is an unfiltered source.
C) The average size of a bacteria is between the diameter of 0.5 to 5 µm. A bacteria reproduces asexually. The cell divides by binary fission, the DNA replicates itself and then they are divided into two identical cells. Some bacteria make their own food and some rely on a supply of ready made food. VIRUS A) labelled B) Viruses are not cells and are not made from cells.
Colonisation: The presence of the germ without invasion and without host response. It does not require antibiotic treatment. Infection: occurs after invasion and multiplication of the microorganism in the host associated with response (fever, leucocytosis, infected drainage, etc..). The infection requires antibiotic treatment and usually takes place after colonisation. HSC 008-(1.4)What is the difference between a “systemic infection” and “localised infection?” The difference between localised and systematic infection is that localised infections develop only in one place of the body while systemic infections spread all through the body by the bloodstream.
To confirm this idea, Marshall Nirenberg used a synthetic RNA containing only one kind of base. What question was his experiment attempting to answer? 8. Briefly describe Seymour Benzer’s experiment that answered the question: “Do mutations in the DNA sequence of a gene correlate with protein changes?” 9. Marshall Nirenberg and Heinrich Matthaei used mRNA made up of repeating uracil nucleotides in a cell free extract.