Funny and Creative Mind Maps & Mnemonics that really help you better understand the magic and abstract medical world. Specially for USMLE Step1 students... Don't forget to buy your First Aid Step 1 Book, watch the videos with your Fantabolous MindMaps printed. Enjoy this blog!
Q: Bacterial strain X is resistant to ampicillin and sensitive to gentamicin. Bacterial strain Y is resistant to gentamicin and sensitive to ampicillin. Bacterial strains X and Y are grown in mixed culture in medium without antibiotics, and then the culture is plated on medium containing both ampicillin and gentamicin. Bacterial colonies grow on the plates. In a second experiment, separate strains of X and Y are plated together on culture medium containing ampicillin, gentamicin, and DNAse. No colonies grow on these plates. Assuming that bacterial cells are impermeable to DNAse, what process best explains these observations?
Q: Bacterial strain X is resistant to ampicillin and sensitive to gentamicin. Bacterial strain Y is resistant to gentamicin and sensitive to ampicillin. Bacterial strains X and Y are grown in mixed culture in medium without antibiotics, and then the culture is plated on medium containing both ampicillin and gentamicin. Bacterial colonies grow on the plates. In a second experiment, separate strains of X and Y are plated together on culture medium containing ampicillin, gentamicin, and DNAse. No colonies grow on these plates. Assuming that bacterial cells are impermeable to DNAse, what process best explains these observations?
ReplyDeleteA: Transformation