robin082006
Forum Hero
Topics: 471
Posts: 5,125
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B?
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| pawan.dr
Forum Junior
Topics: 5
Posts: 26
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D is the right ans. o.45 microns filter can only remove bacteria with intact cell walls.it is not effective in the removal of mycoplasma which doesnot have a cell wall nd obviously not effective against viruses
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| robin082006
Forum Hero
Topics: 471
Posts: 5,125
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Can you give your reference pawan please?
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| pearljam59
Forum Guru
Topics: 120
Posts: 273
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I am guessing the point of this question is which answer is the SMALLEST in size. Aren't viruses the smallest infectious agents and bacteria are the largest? If so, then the answer should no way be D. Thoughts?!
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| huzefa
Forum Junior
Topics: 2
Posts: 66
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I thought it would be Staph Aureus, seeing as the filter that would allow 0.45micron particles to pass thru it would surely get rid of a bacteria like Staph Aureus which is greater than 2micron.
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| pocas
Forum Elite
Topics: 7
Posts: 169
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hey guys the answer is D
that q is about physical methods of control , filtracion : 0,45 um filter out most bacteria exept MYCOPLASMA and other cell wall less forms
0,22um will filter out all bacterias and spores
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| pearljam59
Forum Guru
Topics: 120
Posts: 273
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Yea I still do not get it. What is the point of a FILTRATION...passage of something and not something else. Unless we are supposed to MEMORIZE the size of every particle (which I refuse to do)...shouldn't we just pick the SMALLEST size answer?!
What is the concept?!
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| pocas
Forum Elite
Topics: 7
Posts: 169
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JUST MEMORIZE THE SMALLEST ONE 
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| zaidsuror
Forum Elite
Topics: 61
Posts: 238
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Why not staph ,isn''t it the largest??
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| ts97
Forum Senior
Topics: 13
Posts: 128
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I think it's staph who cannot pass the filter, it's the biggest plus in clusters. Micoplasma is the virus size.
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| netlover
Forum Junior
Topics: 3
Posts: 54
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Hi, guys, read the question stem very carefully before you give your answer. The question asks which substance will be blocked by the filter, which is definitely S. aureus. All others can pass through the filter.
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| Slacker
Forum Elite
Topics: 29
Posts: 141
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E. Because thats the only one thats going to be removed from a fluid that passes through a filter because stap is the largest. Bacterias are large. The other choices will not be removed from the filter and will stay in the fluid when the fluid passes through the filter.
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| whitmer
Forum Newbie
Topics: 1
Posts: 17
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E - yes, finally. You guys are overcomplicating a very simple question. You could use a filter twice that size (0.9microns) and get the same answer.
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