00:01
Okay, so question eight, if you were to try to identify a culture of staphlococcus aureus from other genera of shthylococxy, what media would you use? the answer, of course, is going to be manitol salt auger.
00:13
Answer d.
00:14
Why? because staphylococcus aureus can ferment manatol, other staphlocococci cannot.
00:21
Okay, so the answer is d.
00:22
Okay, next question.
00:24
An example of a facultative anerobe is, so this is number nine, e coli.
00:32
This is answer b.
00:37
Why is that? well, streptocococcus is aerobic.
00:40
Clostridium is anaerobic.
00:42
And helicalbacter is aerobic.
00:44
They're all strictly obligate aerobs or obligate anoreps.
00:48
Only coli is a facultative anoreb because it can grow in aerobic environments and it can also grow in anaerobic environments.
00:56
It can grow in both, although better in oxygenated in aeroic environments.
01:02
Okay, so i guess, 10 through 11, 13 are basically answering.
01:10
So 10, 11, 12, 13.
01:18
So, let's see.
01:19
For 10, growth is going to be at the very top, where oxygen concentration is the highest.
01:24
This is going to be c, obligate a robe, because it's only growing at the top.
01:35
11 is going to be obligate anorob.
01:39
Oh, whoops, sorry, not c.
01:41
This should be d.
01:43
So 10 is d.
01:46
And that means that 11 is going to be c.
01:51
It's growing at the bottom, which means we're very little, if not no anaerobic.
02:02
Little to no oxygen is present.
02:05
So we have our obligate anaerobes.
02:13
Okay.
02:14
12, it's mostly growing at the top, and then also very few, but fewer, but there's still some growth at the bottom...