Four tubes are illustrated with cultures grown in a medium...

Four tubes are illustrated with cultures grown in a medium that slows oxygen diffusion. Match the culture tube with the correct type of bacteria from the following list: facultative anaerobe, obligate anaerobe, microaerophile, aerotolerant anaerobe, obligate aerobe. Please identify a bacteria that exhibited the different oxygen requires.

Transcript

00:01 Okay, so the question is matching the tubes with the oxygen tolerance description.

00:08 So with a, we have all the bacteria growing on the bottom.

00:13 It is an obligate anerobe because they can't tolerate the oxygen concentration.

00:19 And remember, the closer the fluid is to the open air interface, the more oxygenate is going to be.

00:27 So there's decreasing oxygen as you go down.

00:31 And it's an obligate a first one is an obliqueen anerobe because it's only growing at the very very bottom, which would be anorobic.

00:40 Okay, the next one, b is growing at the top, so it's an obligate a rope.

00:47 Okay, c is going right in the middle, which means there is just a tiny bit of oxygen, just not a lot.

00:55 Which would make that one a microarophile.

00:58 You can use a small amount of oxygen.

01:04 Then we have d.

01:06 Mostly growing at the top, some of the cells are growing near the bottom as well that are in a more that are in a well, i guess let's just say they can take advantage of the resources.

01:20 And so for that group, this is known as a facultative anerobe.

01:24 That means that what facultative anore means that if they need to, they can totally grow in an anaerobic environment.

01:32 But most of the time, these facultative anorbs prefer oxygenated environments.

01:42 Identify, oh, identify bacteria that exists different oxygen requirements.

01:48 Okay.

01:50 Oof...

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