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Microorganisms Essay Examples

Essays on Microorganisms

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SOP for Masters in Microbiology

Masters in Microbiology will be the step-stone for my ambition to be a discerning microbiologist. With my bachelor's degree in microbiology from the University of Peshawar, Pakistan about to be completed, my dream is to pursue Masters from a renowned university in order to give due prestige to academic achievements. After my 6th semester during summer vacations I did 2 months internship in a microbiology laboratory in a hospital Hayatabad Medical Complex Peshawar. I learnt; collection of different samples e.g.…...

Serratia marcescens & Bacillus cereus Report

Intro The function of this study is to differentiate and recognize 2 unidentified organisms offered by the trainer in a nutrient broth. It is just known that the 2 organisms are from vomit; one is gram-positive and the other is gram-negative. It is essential to very first different the 2 organisms by inoculating a nutrient agar plate using the streak-plate approach. The initial streak-plate procedure was performed and placed in the incubator at 37 ◦ C for 24-48 hours. Upon…...

Micro Lab - Bacteria

Briefly describe the steps required to aseptically transfer bacteria from an unknown to a tube of liquid broth. Answer: To aseptically transfer bacteria from an unknown to a tube of liquid broth you have to flame the loop or wire before you begin to sterilize it. Then you remove the caps from the tubes and flame the mouths of the tubes to prevent air-borne contamination. Next, you have to pick up the inoculums or unknown culture by running the sterile…...

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Identification of Microorganisms by Differential Staining

Through the process of differential staining, there are distinct differences between the cell walls of gram-positive and gram-negative bacteria. In the case of gram-positive bacteria, the cell wall is comprised of 60-90% peptidoglycan and is very thick. There are numerous layers of teichoic acid bound with peptidoglycan thereby creating very thick cell membranes which causes the cell wall to take up large quantities of basic dye and appears purple. (Hands-on-Labs. (2012)). Conversely, gram-negative bacteria cell walls are much thinner with…...

Identifying Micrococcus luteus

There are many reasons for establishing the identity of a microorganism. The reasons range from the knowing the causative agent of a disease in a patient, so as to know how it can be treated, to knowing the correct microorganism to be used for making certain foods or antibiotics. Laboratory scientists are able to isolate, identify, and determine the antimicrobial susceptibility pattern. Some methods that are used in laboratory settings are: the use of microscopy whether it’s using wet mounts…...

Identifying Unknown Bacteria

Abstract One of the most fundamental differential staining strategies used in the research study of bacteriology is gram staining. There are 2 primary types of germs, gram unfavorable and gram-positive. The function of this experiment was to perform a variety of tests to identify the germs contained in the unidentified sample identified number 15. The following are the tests that were used to determine the two different bacteria. The SIM test, which evaluates for sulfur decrease, indole production, and motility,…...

Lab Report about Simple Staining of Microbes

This experiment was carried out to perform staining methods on microbes, explain the mechanisms of staining, namely, simple staining, and learn how to use the microscope. The experiment setting was kept as sterile as possible when conducting the experiment. The microbes under the microscope were drawn out and labelled. In conclusion, different staining techniques are used to determine the presence of certain exterior structures of the bacteria like the cell envelope or just to identify the basic shape and size…...

Microbiology Laboratory Report

Objectives Aim of this experiment is to differentiate between the two major categories of bacteria , gram positive and gram negative. Through this experiment, gram staining skills develop. More understanding the types and morphology of bacteria. Expected experimental result, Escherichia coli (E.coli ) is a negative gram bacteria which stain pink colour , while Staphylococcus aureus ( S.aureus ) is a positive gram bacteria which stain purple colour. Materials Bacteria : Escherichia coli , Staphylococcus aureus Crystal Violet Gram’s iodine…...

Effects of Tonicity on Cell Membrane

Abstract The purpose of this experiment was to determine the results of tonicity on a cell membrane using red cell, potato strips and three unknown services (A, B, C). First three slides were prepared consisting of RBC's and unknown options A, B and C. A control slide was prepared only utilizing RBC's. After observing each slide under the microscope it was figured out that unidentified option A was hypertonic because the RBC appeared to have actually diminished. The RBC in…...

Spread of Infection by Microorganisms

Identify the differences between bacteria, viruses, fungi and parasites Bacteria are a single celled organism that multiplies by themselves. The majority of bacteria’s are harmless and beneficial to the human body but some can cause infectious diseases. A bacterium usually affects one part of the body and doesn’t spread across or through the body. Bacterial infections are normally treated with a cause of antibiotics Viruses are made up of genes and proteins that spread throughout the body by invading the…...

Bacterial Transformation Lab Report

Introduction In this lab, the goal was to transform the bacteria e-coli to glow in the dark (or under a black light). Four plates were set up with agar in them for the bacteria to feed on and grow. Changes were then made to the bacteria. One plate was the control plate, having only the LB or agar for the bacteria and negative pGLO, which is the liquid not containing the plasmid. This is the plate that was compared with…...

Phylum Sarcodina

Sarcodina, the largest phylum (11,500 living species and 33,000 fossil species) of protozoans). It comprises the amebas and related organisms; which are all solitary cells that move and capture food by means of pseudopods, flowing temporary extensions of the cell. Most sarcodines are free living; others are parasitic. One of these parasites is the causative organism of amebic dysentery. With the exception of chloroplasts, sarcodines are identical to the ameboid members of the phylum Chrysophyta. Sarcodines may reproduce asexually by…...

The Pandemic Virus

The virologists determined the identity of the virus causing the disease by taking blood samples from the people who were sick or who were getting sick, the n they put them under the microscope and studied them. They tracked the epidemic down by following where people were getting sick; the virologists finally followed the virus back to the ship that was carrying all the animals and the monkey. They conquered the virus by taking the serum from the host after…...

Formation of Ascospores

In a typical ascomycotina, pyronema for example, sexual reproduction is by gametangial contact invoving the ascogonium ( female organ) and antherridium (male organ). Ascus and ascopores are results of sexual reproduction . the female and male organs aare produced by the mycelium. A trichogyne is also produced which joins the antheridium to the ascogonium. The content of the antheridium passes into the ascogonium through the trichogyne. The ascogonium and antheridiumare multinucleate. After the contact have pass into the ascogoniu, the…...

Unicellular organism

For prison cell assignment, see Single-celling. Valonia ventricosa is among the largest unicellular species. A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of multiple cells. Historically the simple single celled organisms have sometimes been referred to as monads. l] The main groups of unicellular organisms are bacteria, archaea, protozoa, unicellular algae and nicellular fungi. Unicellular organisms fall into two general categories: prokaryotic organisms and…...

Fighting Bacterial Growth

The purpose of this lab was to determine the effectiveness of antiseptics, disinfectants, and antibiotics on bacteria. The hypothesis was that if bleach was used, it would be the most effective because bleach is commonly used to clean and disinfect various things. The variables that were tested were antibacterial soap and Scope mouthwash for the antiseptics; bleach and ammonia for the disinfectant; and Cipro, erythromycin, and tetracycline for the antibiotics. All of these chemicals were used on the bacteria M.…...

A Membrane-Enclosed Nucleus

They are very small--individually not more than one single cell--however there are normally millions of them together, for they can multiply really fast. A number of bacteria cause disease, these are called pathogenic bacteria. Fortunately our immune system knows how to deal with them. However not all bacteria are 'bad guys'. We need bacteria to stay alive. Bacteria are prokaryotes (single cells that do not contain a nucleus). Microbiology is the study of prokaryotes, eukaryotes and viruses. Did you know…...

Exome Sequencing

Exome sequencing, also known as whole exome sequencing (WES), is a genomic technique for sequencing the entire protein-coding region of genes in a genome (known as the exome). It consists of two steps: the first step is to select only the subset of DNA that encodes proteins. These regions are known as exons  humans have about 180,000 exons, constituting about 1% of the human genome, or approximately 30 million base pairs. The second step is to sequence the exonic DNA…...

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