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In Griffith's experiment, the S type bacteria are harmless, but can be transformed into the pneumonia-causing bacteria.
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- What were some of the conclusions of the Griffith experiment on streptococcus pneumonia? Why was the S strain heat treated? What was the purpose of using the R strain? What happened to the living R strain after being mixed with heat killed S-strain?Interpret the tests in the image and identify the unkown bacteriaWhy the synergy test results demonstrated that Penicillin G and Gentamicin did not act synergistically against the Streptococcus group G strain?
- An E. coli colony grew on minimal medium supplemented with arginine and leucine. However, bacteria from this colony are unable to grow and form colonies on minimal medium supplemented with arginine and methionine. What is the genotype of the bacteria in this E. coli colony?In not more than 100 words, What antigens/strains are used for the Weil-Felix test, and from what bacteria are they from respectively?Describe the experiment done by Frederick Griffith in 1928, where the non-lethal (rough) strain of Streptococcus pneumoniae bacteria killed experimental mice when mixed with the heat-killed smooth strain. Discuss what may have happened to the rough strain after the heat-killed smooth strain was introduced and why you think the rough strain killed the mice. What would be the conclusion and significance of this study and its finding?
- explain:The process by which alteration in the genetic makeup of live type IIR bacteria was performed by heat killed type IIIS bacteria.The images attached are the photos of bacteria in yoghurt under a misroscope. According to these images and your own knowledge, can you make a biological drawing of bacteria in yoghurt ( in a circle) and identify the types of bacteria accurately?Why does RNA give a positive result to Biuret's test?
- During the Ames test, his− bacteria are exposed to a mixture of chemical compounds extracted from SurbWay Sandwich. If the his− bacteria revert to his+, then what can we say about the chemical?What are Koch's postulates? Discuss the importance of these postulates in the identification of bacteriaWhy are certain anti-bacterial agents more effective at killing bacteria?