When scraping and transferring the E.coli bacteria from the E.coli starter plate to the +BLU and -BLU tubes, why is it importnat that you not scrap up any of hte agar in the process?
Answer:
The agar is the media for the bacteria to grow. if agar is scarped with culture, it may lead to impurities.During the transformation, side the loop smoothly over the surface to pick up the bacteria. You don't need tons of bacteria, but get enough so that you can see a small clump sticking to the loop.
During the transformation process, the bacteria is transformed to plasmid tubes using a loop. It is important not to transfer any agar medium along with bacteria bacause the impurities present in agar may interrupt the process of transformation or agar may itself act as an impurity and inhibit the transfrmation process.
When scraping and transferring the E.coli bacteria from the E.coli starter plate to the +BLU and...
Date: Group: Name: Table 2. Bacteria isolated from the skin on the blood agar plate. Colony type-II Colony type-l Colony type-III Gram stai Colony morphology, margin, elevation, color, etc. Hemolysis Table 3, Bacteria isolated from the rectal area on the EMB plate. Colony type-I Colony type-III Colony type-II Gram stain Colony morphology, margin, elevation, color, etc. Colony arrangement 4. Review questions d. In summary, what is the major purpose of this experiment? What are four reasons for knowing which microorganisms...
BI0S242, Week 7, Lab 1 2. Do all the bacteria samples grow on Eosin Methylene Blue and MacConkey agar? not, why What does a metallic green sheen indicate on an Eosin Methylene Bhue plate? 3. 4. What additional information did the lactose fermentation tubes provide? Why couldn't we examine any anaerobic bacteria that are part of the normal digestive system? 5. 6. Were there any colonies in the rest room samples? Could you identify any that gave similar results on...
.1)a) Why was it important that the –pGLO bacteria were found growing on the LB plate? Why would their absence create problems in interpreting our results? b) What two conclusions (one per plate) should you draw from the observation that –pGLO bacteria did not grow on the LB/amp plate, but that some +pGLO bacteria did? c). Why did we observe bacteria colonies that glowed under UV light when we inoculated +pGLO bacteria on an LB/amp/ara plate, but not when we...
1. Human microbiota. What type of bacteria species are likely to be cultured from your throat swabs on Blood agar? Why? 2. What is the purpose of the candle jar for the cultivation of the Blood Agar plate/throat swabs and what type of metabolism do you think you are targeting? 3.With reference to your two nasal swabs, what is the difference between the two culturing strategies: culture this swab on a mannitol-salt-agar plate and inoculate the nutrient broth containing 7.5%...
Why do you use a bacterial culture plate when working with viruses? How do you count phages? Describe the general process and the end result. If there were no plaques on your plate, offer an explanation. In this procedure, why is it important to use a hard agar with a soft agar overlay to demonstrate plaque formation?
plz help
the inoculating loop After you use an inoculating loop to transfer bacteria from a culture tube onto a slide, you should before putting it away For the toolbar, press ALT+F10 (PC) or ALT-FN-F10 (Mac). TTTT Paragraph Arial 3 (12pt) E - T %D0Q TT. Пнти се QIX I Path: P Words:0 QUESTION 3 In lab, bacterial cultures (Petri plates and tubes of culture broth) should be kept covered at all times. This is partly to protect us from...
LAB Genetic Engineering of Bacteria Problem Is it possible to transfer the allele for resistance to the antibiotic ampicillin into a bacterial cell? Objectives After completing this lab, the student will be able to: 1. Demonstrate micropipetting and sterile pipetting techniques for handling and transferring bacteria and plasmid DNA. 2. Maintain sterile conditions for culturing bacterial cells. 3. Inoculate bacteria into flasks, culture tubes, or agar plates. 4. Culture isolated individual colonies from an agar plate to form genetically identical...
LAB17 Genetic Engineering of Bacteria Problem Is it possible to transfer the allele for resistance to the antibiotic ampicillin into a bacterial cell? Objectives After completing this lab, the student will be able to: 1. Demonstrate micropipetting and sterile pipetting techniques for handling and transferring bacteria and plasmid DNA. 2. Maintain sterile conditions for culturing bacterial cells. 3. Inoculate bacteria into flasks, culture tubes, or agar plates. 4. Culture isolated individual colonies from an agar plate to form genetically identical...
2- choose the correct option You streak an agar plate, using an inoculum from a tube of a broth culture of E. coli. After 1 day of incubation, you see confluent growth covering the whole surface of the plate. Which of the following errors would NOT explain this result? You put the plate in the fridge instead of the incubator You forgot to flame the loop between sections of the plate You picked additional culture up from the plate after...
2. What is the enzyme being tested? 3. What is the substrate if the enzyme? 4. For what purpose do bacteria that have the enzyme utilize it? 6. What will occur if the plate is incubated right side up? 7. What will occur if the plate is incubated for more than 24-48 hours? Exercise 7: Selective and Differential Growth Medium and Tests 95 Exercise 7.9 Hydrolytic Exoenzymes: Lipase and Casease LIPASE TEST Lipids are fatty acids used by some bacterium...