You streak an unknown sample
You streak an unknown sample and after incubation you see some red colonies and some yellow. What can you interpret from this experiment? Select one: a. Likely started with a pure cultureb. A spread plate would work betterc. You have identified Enterobacter aerogenesd. You have identified Serratia marcescense. Likely started with a mixed culture Question 22 Not yet answered Marked out of 1.0 Flag question Question text Why is the glass rod in the spread plate method put in alcohol and ignited instead of sterilized like a flame loop? Select one: a. Glass oxidizesb. Glass meltsc. Glass takes longer to coold. Glass burnse. Glass is more sterile Question 23 Not yet answered Marked out of 1.0 Flag question Question text What would likely occur if the flame loop was not sterilized between streaks on the quadrant streak method? Select one: a. Bacteria will not stick to the loopb. Virus will be introducedc. Flame loop will be too hotd. The sample will be contaminatede. Subsequent streaks would have more colonies Question 24 Not yet answered Marked out of 1.0 Flag question Question text True or false: Most colonies can been seen without aid (naked eye), and most single cells cannot be seen without a microscope. Select one: TrueFalse
