Search found 12 matches

by Elersong
Mon Dec 08, 2008 3:31 am
Forum: Microbiology
Topic: HIV Exposure to air
Replies: 7
Views: 46359

HIV Exposure to air

So, I"m sure almost everyone who will read this has heard that HIV "dies" when exposed to air. Ignoring the fact that I don't believe viruses are living organisms, can someone explain to me what it is exactly that renders the virus non-viable after exposure to air?
by Elersong
Wed Nov 19, 2008 5:18 am
Forum: Molecular Biology
Topic: Cis and Trans Elements of Operon?
Replies: 4
Views: 10125

Okay, that phrases it much better than my notes. And yes, I am taking micro and genetics with molecular perspectives. Why, am I breaking some rules by asking these questions or something? ( I'll stop if I am. )
by Elersong
Mon Nov 10, 2008 1:28 am
Forum: Microbiology
Topic: AMPHITRICHOUS MOVEMENT
Replies: 3
Views: 5695

LOL. The answer is so simple... kinda ticks me off...

But thanks... uuuuggghhhh...
by Elersong
Tue Nov 04, 2008 5:18 am
Forum: Molecular Biology
Topic: Cis and Trans Elements of Operon?
Replies: 4
Views: 10125

Cis and Trans Elements of Operon?

What is the difference between CIS and TRANS elements when regarding operons? I know that it has something to do with one being on the same DNA molecule, but it's a bit foggy to me. Can anyone explain them and how they assist in regulation of the genes?
by Elersong
Sun Nov 02, 2008 11:32 pm
Forum: Microbiology
Topic: ELISA Test
Replies: 3
Views: 3673

That is something that I didn't know. So there would be no heat fixation?

I guess a way to further the question is: What is it about the proteins that cause them to become attracted to the inside of the well?
by Elersong
Sun Nov 02, 2008 11:23 pm
Forum: Microbiology
Topic: Heterotrophs and Carbon Fixation
Replies: 7
Views: 10269

That is interesting.

So I guess a better way to ask my question is this: If a heterotroph can behave in a manner in which it obtains carbon from both organics and CO2, then what is the criteria that differentiates mixotrophs from heterotrophs?
by Elersong
Wed Oct 29, 2008 7:55 pm
Forum: Microbiology
Topic: AMPHITRICHOUS MOVEMENT
Replies: 3
Views: 5695

AMPHITRICHOUS MOVEMENT

My micro professor has been really ticking me off this year about a certain question I got wrong on a test earlier this year. The question seemed simple enough : Describe the method of movement of an amphitrichous bacterium. For THREE MONTHS NOW, I have asked and researched and begged and pleaded, b...
by Elersong
Wed Oct 29, 2008 7:44 pm
Forum: Cell Biology
Topic: Help w/ Lab Assignment: How Things Get Into & Out Of Cell
Replies: 5
Views: 7119

Hmmm, well now I have a question: Where did the potassium come from? In the question, the bag was filled with glucose and iodine, and the beaker had water and starch- making no mention of potassium.

And why would the water become purple?
by Elersong
Wed Oct 29, 2008 7:29 pm
Forum: Microbiology
Topic: ELISA Test
Replies: 3
Views: 3673

ELISA Test

Does anyone know exactly how the antibodies/antigen molecules are bound to the inside of the microtitre wells in the first step of the ELISA? I have done some research and can't seem to find the mechanism by which they are attatched.
by Elersong
Wed Oct 29, 2008 7:23 pm
Forum: Genetics
Topic: can a school boy do some genetic experiment?
Replies: 4
Views: 3542

The question is fairly vague. There are many different types of genetics experiments. I know of one in which you can extract DNA in a kitchen that's not too hard. m It's not sequencing, but it's genetics. I did this in my genetics class a while back and enjoyed it. Maybe it will do the same for you.
by Elersong
Wed Oct 29, 2008 7:09 pm
Forum: Microbiology
Topic: Why aren't bacteria taking over the world?
Replies: 15
Views: 23745

So would anyone disagree that another limiter of the growth of a bacterial population would be their own waste? An increase in the number of bacteria would result in an increase in the amount of waste produced, would it not? And that waste is waste to said bacteria for a reason...
by Elersong
Wed Oct 29, 2008 7:01 pm
Forum: Microbiology
Topic: Heterotrophs and Carbon Fixation
Replies: 7
Views: 10269

Heterotrophs and Carbon Fixation

So, I was reviewing some old notes concerning microbial metabolism, and I came up on a problem. In some of my notes, I have it written that heterotrophs use pre-fixed carbon in the form of organics to meet their need of a carbon source because they cannot fix their own carbon. In other notes, howeve...