Microbiology Spring 2007 - page 6

:welcome: Gonna try to stick this one!!! Heres to a wonderful semester for all us MBers :):welcome:... Read More

  1. by   gashba
    I too, am taking Micro and A&P II. I am more nervous about the TEAS Test. Trying to brush up on my Algebra, but being 46 and terrible in Math I am really worried.
  2. by   BlessedMom
    Yeah, I feared the same thing about math. Thankfully I got through it and actually got an A. I just BARELY made it to passing eligilibity for Algebra. Just study up on the basics. There were things I had totally forgotten (like fraction multiplication) that I picked back up. Once I saw it and practiced it...it came back. I wouldn't have gotten those right if I hadn't checked that. Good luck with it Gashaba. Let us know how it goes!!
  3. by   qaqueen
    What is the TEAS test?
  4. by   qaqueen
    Okay, I am submitting my first assignment today. Chapter 2 in the Torturra book, chemistry. Only 3 questions, how bad could it be:uhoh21: ?
  5. by   leximast1
    Did you have to do any of the questions at the end of chapter 2 (chemistry, Tortora)? I am stumped on critical thinking question #3. "What happens to the relative amount of unsaturated lipids in its plasma membrane when E.coli grown at 25c are grown at 37c degrees?" aren't unsaturated lipids fluid at both temps and why would the amount chance? I am missing something.
  6. by   qaqueen
    The first thing I notice about the question is: What happens to the RELATIVE AMOUNT. The question is not about fluidity, more likely about the alignment of the lipids in the membrane. I would check out the fluid-mosaic model information first.
    I dont have my text with me right now, but I will check back with you tomorrow.
  7. by   leximast1
    Ok, So maybe E.coli grown in cooler conditions would have a greater amount of unsaturated fats in its membrane? Does E. coli change the bonding or does it just select more unsaturated(vs saturated) fats from the medium it is growning in?. . . . . Oh Boy, and the chemistry chapter is suppose to be a review. This is going to be a long 12 weeks. We are having our first test next Monday! Ugh! Don't panic.
  8. by   catzy5
    Quote from leximast1
    Ok, So maybe E.coli grown in cooler conditions would have a greater amount of unsaturated fats in its membrane? Does E. coli change the bonding or does it just select more unsaturated(vs saturated) fats from the medium it is growning in?. . . . . Oh Boy, and the chemistry chapter is suppose to be a review. This is going to be a long 12 weeks. We are having our first test next Monday! Ugh! Don't panic.


    Ok I have no idea on your question I don't start Micro for another week, however i did notice you and I are using the same texts. So hopefully you will have the answers for me by the time I get to that chapter!

    <big grin>
  9. by   leximast1
    Gee I wish it was the other way around. Well, You might want to see how I do on the first test before looking to me for any answers. I ordered the study guild for this text and I hope it is a good one. My instructor is good but she is moving at a train wreck pace but I think it is because she has to. Looking through the chapters there is a LOT of stuff in microbiology and we are covering it all in 12 weeks. . . any way If I can help you I will try.
  10. by   DanEMT
    Quote from leximast1
    Ok, So maybe E.coli grown in cooler conditions would have a greater amount of unsaturated fats in its membrane? Does E. coli change the bonding or does it just select more unsaturated(vs saturated) fats from the medium it is growning in?. . . . . Oh Boy, and the chemistry chapter is suppose to be a review. This is going to be a long 12 weeks. We are having our first test next Monday! Ugh! Don't panic.
    This question dosen't make sense to me. E. Coli is gram Neg so it has a plasma membrane and plasma membranes are made of phospholipids. These are different than simple lipids (unsat.) they are complex lipids. I crushed this class and we used that book but this question is confusing me. I even searched the web and found nothing on E. Coli membrane fats at different temps. It the critical thinking section right, I say the question is incorrect and the answer is, there are phsopholipids in the outer membrane. If anyone finds anything different post it, I would like to know. We covered what the effects of different temps on different bacteria were, but not that. As far as unsaturated fats they will melt at lower temps, maybe thats what he is trying to get at.
  11. by   qaqueen
    I checked my book, my first comment is 'dang, I'm glad that wasnt part of my assignment".

    That said, I did a search in google with the following string "unsaturated lipids in plasma membrane E. coli"

    It appears that the increase in heat increases the fluidity of the unsaturated lipids. WARNING: I only reviewed a couple of the articles.
  12. by   Jedi_Iatros
    Today was my first day taking Microbiology.

    I was half asleep coming from the NOC shift ;-)

    Tommorow: Intro to Physiology and English 1A.

    Saturday: Human Anatomy and Psychology
  13. by   leximast1
    Ok, I asked my teacher and she said that E. coli can have one of 2 emzymes that would either change to a double bond in the saturated lipid or remove it and attach a new fatty acid making it a unsaturated lipid. So I guess they will change their membrane make-up depending on the temp to make sure their membrane keeps the same fluidity. At least that is what I think she said. Wow. Now how was I suppose to know that?

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