Purpose and Background Cells divide in two ways, mitosis and meiosis. Mitosis is used to produce cells that are genetically identical to the parent cell for growth, asexual reproduction, or repair after injury. Cells that are produced by mitosis are diploid, meaning that they have two complete sets of chromosomes, one from each parent. Meiosis is used to produce haploid cells that have only one set of chromosomes, a mix of chromosomes from both parents. Meiosis produces cells that are genetically unique from their parent cells.…
Next, using a graduated cylinder, tap water (10 mL) was added to each vial containing the culture medium. Upon addition of water, white culture medium turned blue. Additional amounts of tap water were added to each vial to provide more moisture. Next, three grains of yeast were added to each of the four vials. The vials were capped.…
Materials: Microscope, glass slides, coverslips, lens paper, Tetrahymena culture, 20 µL micropipette, Detain©, timer, calculator, Neff (growth medium), distilled water, 50 mM salt water, 500 mM salt water Procedure: Follow the given procedure. Variables: The independent variable are the different solutions, and the dependent variable is the rate of vacuole contractions. The control variables are the time, the amount of each solution, and the measurements of the solutions. Safety: Do not touch the tip of the micropipettes…
Bacteria cells are taken from the culture and literally stabbed into a gelatin medium using either an inoculating needle or loop. If the bacteria contains enzymes called proteases, the enzyme will break down the proteins found in the gelatin and will leave a liquid residue in the tube. If the bacteria contains no protease enzymes, no liquid will be formed and the gelatin media will appear unchanged. The bacteria tested created liquid in the tube which proved it was positive for the gelatin stab test and possessed the enzyme protease.…
After being given the broth, using sterile methods I streaked a TSA plate using the quadrant method with the given broth, in hope to grow the bacteria in isolated colonies. TSA plates are a growth media that is used for the general growth of bacteria needed for culturing. It works well because the media is nonselective…
Then, lyse the bacteria with a solution containing sodium dodecyl sulfate (SDS) and sodium hydroxide and the chromosomal DNA and plasmid DNA will be denatured. The chromosomal DNA and proteins precipitate in a complex and then…
Clostridium Botulinum Clostridium Botulinum is a single celled bacteria and has organelles, not bounded by a membrane. They are asexual and reproduce by binary fission. It belongs to Kingdom Bacteria because it has peptidoglycan in its cell wall. It is unicellular and lack nucleus. It is obligate anaerobe as well as have ability to produce by spore so it falls under Phylum Firmicutes.…
After the preparation of the tubes, both tubes were incubated on ice for 15 minutes. Then, they were heat shocked at 42°C for 50 seconds and placed back on the ice for 2 minutes. Lastly, nutrient broth was added to each tube and both tubes were incubated at room temperature for 10 minutes. The E. coli in the tube containing the pGLO plasmid (+pGLO) was swabbed onto 2 separate plates with a sterile loop. One plate contained Laurie…
Create a table consisting of four columns that features: time intervals of 30 seconds, number of bubbles that have risen in the warm sugar water yeast mixture, number of bubbles that have risen in the cold sugar water yeast mixture, and the number of bubbles that have risen in the distilled warm water yeast mixture. Fill the given plastic container with warm water halfway. Place a thermometer in the plastic container, and record temperature. Acquire scale, position wax paper over platform, and measure 0.5 grams of yeast with scoopula.…
DNA plasmid was added to each of the “+plasmid” and it expresses the ampicillin resistance gene. According to the data, that didn’t happen because the +pGLO LB/amp had 3 white colonies at the end of the bacterial transformation and the +pGLO LB/amp/ara had 2 colonies that glow at the end of bacterial transformation meaning that there was an error in our “+plasmid” which occurred during the lab. We did predict that the -pGLO LB/amp would remain the same with no colonies and -pGLO LB would grow bacteria because the “-plasmid” does not express the ampicillin resistance gene. According to the data, The -pGLO LB/amp had no colonies present at the end of its transformation and the -pGLO LB had bacteria present at the end of its transformation which…
This is done by affecting the bacteria transformation of E coli bacteria by using heat shock and incubation. The hypothesis for this study is that the one with no antibiotic or dilution there would be tremendous amount of E. Coli bacteria and with antibiotic (ampicillin) the amount of E. Coli will be lower however if the E. Coli is diluted the amount of bacteria count will be lower because the E. Coli is resistant to ampicillin. Methods…
Gram positive: First, the bacteria sample is placed on a glass slide and heated only to the point of rendering it innocuous in terms of being infectious to the handler. Next, the bacteria sample is treated with a gentian violet-iodine solution for up to sixty seconds. The slide is then gently rinsed under clean water and the Gram solution is applied, which is a mixture of iodine and potassium iodide diluted in water. This step triggers a reaction to the gentian violet compound.…
The bacteria used in the experiment are Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Klebsiella pneumoniae, and Salmonella pneumonia. These all bacteria will be culture in the nutrient broth. The first stage is making Nutrient Broth. Weigh out 5.8 grams of nutrient broth powder.…
Next reflame the loop, then return to the TSA turning it at 90 degree angle while streaking quadrant two dragging some of the substance from quadrant one. Follow the same steps until all three quadrants are completed, but avoid entering quadrant one only take from quadrant two. The purpose of the streak plate method is to produce isolated colonies of an organism. The TSA plate was incubated for approximately 48 hours at 37 degrees simply to grow bacteria. After returning back to the laboratory and noticing growth on the TSA plate the same streak plate method was applied to the MacConkey agar and the Mannitol salt agar.…
The tubes will be then incubated at 35°C for 48 hours. One tube will be placed with five drops of methyl red reagent, and the other with Barrit’s reagent. Methyl Red test is used for the indication of fermenting ability of bacteria, producing mixed acid. Voges-Proskauer test is used to detect the production of acetoin, also known as 2,3-butanediol. 6.…