00:02
Hello everyone, so this question is regarding a lab result of the petri plate or the culture plate, results of a cultured plate.
00:24
So the first question which is marked as number five here asked is following image shows the growth of an unknown bacterium on the macongi agar, macongi agar.
00:37
So which of these bacteria is likely to grow on this plate? so this macongi agar is usually used to identify the lactose fermenters and non -lactose fermenters, lactose fermenters and non -lactose fermenters which means this is usually used to identify the gram negative bacteria, gram negative bacteria and the gram positive bacteria that is the growth of gram positive bacteria are usually inhibited are inhibited on macongi agar, macongi agar due to the presence of bile salt and to the presence of bile salt and crystal violet.
01:44
So these will disrupt their cell wall so that this gram positive bacteria are usually that is the growth of this gram positive bacteria are usually inhibited on macongi agar.
01:57
So here the in the figure the image shown here gives the organism that is the e.
02:04
Coli that is we can see the growth of e.
02:09
Coli is depicted here.
02:12
Now next question here asked is the what makes the a hectan agar selective medium, hecto in agar a selective medium and which bacterium is likely growing on this medium in the image shown below.
02:32
So this hectan agar this is a selective medium, selective medium for gram negative bacteria, for the gram negative bacteria and they differentiate the organism between the ability to produce by the ability to produce the hydrogen, hydrogen sulfide...