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DM: Crabs CF and ALL DAT JAZZ

Discussion in 'MCAT Discussions' started by jhk43, Apr 18, 2004.

  1. jhk43

    jhk43 Senior Member
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    BS
    Crabz:
    which one gets the most selective pressure
    ??? SB on SD, etc? ugh totally guessed A

    drosphilia eye/wing mutation, what is X linked?
    i said vg and vg+

    cystic fibrosis blood test?
    i said check plasma fluid...


    PS:
    if a satellite moves past a moon, does the satellite gain momentum and the moon lose?

    why does the ocean measuring thing float to the surface to send data?
    water ionic disruption, cuz it has to float up to collect data...

    why doesnt rain water mix into the ocean?
    cold, currents, density?

    humus? did higher K mean lower DIC (or whatever the acronym)
    were they testing water samples?
     
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  3. Cerberus

    Cerberus Heroic Necromancer
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    Crabs...that was a tough one.. I think I chose the first crab (i think A?) because 50% of them died in the conditioning phase. The other crab, though it wasnt as likely to condition to the new echinoderm, didnt have any deaths from the conditioning process (therefor no selection pressure).

    I guessed on the drosophila one, it was the last question I had (i skipped around) and i ran out of time.

    What were the other choices for the blood test? The disease was seen in erythrocytes so i think I put plasma, unless blood cells was an option (its all a blur).

    didnt have that PS question
     
  4. jhk43

    jhk43 Senior Member
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    blood test choices: errythrocytes, plasma, antibodies, leukocytes.
     
  5. EvoDevo

    EvoDevo Forging a Different Path
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    vg and vg+ both are x-linked. And I think the selective pressure was on the SB crabs, in which many died....
     
  6. Cerberus

    Cerberus Heroic Necromancer
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    ok, I chose erythrocytes because it was present in the blood cells or something like that.
     
  7. Cerberus

    Cerberus Heroic Necromancer
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    that makes sense, too bad i had to guess (and I dont think I guess that answer) :(
     
  8. EvoDevo

    EvoDevo Forging a Different Path
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    I think the answer was: Since the test would be a genetic one (DNA fingerprinting), you would want the choice which had a nucleus (and hence DNA). Erythrocytes, plasma, and antibodies don't contain DNA. Leukocytes do.
     
  9. Cerberus

    Cerberus Heroic Necromancer
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    d'oh! (in my defense that was also one of my last passages when I was running out of time :( :( )

    I think this confirms my feeling that I bombed BS
     
  10. EvoDevo

    EvoDevo Forging a Different Path
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    Dude, don't worry...there was one passage where I was mind-fried and rushing....and it was like 95% guessing...it might have been the drosophila passage...
     
  11. blz

    blz Senior Member
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    I had this question on my PS independent. If I have a positive charge and I hold it next to a neutral metal plate, what will happen when I released the positive charge? I put it will accelerate towards the plate because you induced polarity in the metal plate and the surface closest to the positive charge should be negatively charge.
     
  12. Treg

    Treg Surgeon in training
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    I had this form as well:

    BS
    Crabz:
    which one gets the most selective pressure
    ??? SB on SD, etc? ugh totally guessed A

    I put SB on SB, since the highest % went to the natural partner

    drosphilia eye/wing mutation, what is X linked?
    i said vg and vg+

    I said the same thing

    cystic fibrosis blood test?

    as per the responses above, since the leukocytes are the only thing with DNA, I put that.

    PS:
    if a satellite moves past a moon, does the satellite gain momentum and the moon lose?

    I put the satellite, since it is smaller and has less inertia

    why does the ocean measuring thing float to the surface to send data?
    water ionic disruption, cuz it has to float up to collect data...

    I put that it had to float up to gather the data

    why doesnt rain water mix into the ocean?
    cold, currents, density?

    Yes, I put that it would form a less dense layer (no solutes in it)

    humus? did higher K mean lower DIC (or whatever the acronym)
    were they testing water samples?

    I am not sure which question this is...

    I was boggled by the sound stage one. Does sound getting absorbed cause increase in heat or potential energy?

    Oh well, it is finally over! I hope that we all get within the score range we anticipated.

    Treg
    :)
     
  13. Cerberus

    Cerberus Heroic Necromancer
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    Got the same on all the other PS answers, I think it increased heat since energy is lost and it has to be lost in some form.
     
  14. NubianPrincess

    NubianPrincess Perpetually Bored
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    I guessed on the drosophila one, it was the last question I had (i skipped around) and i ran out of time.


    So did I. Damn last passage.
     
  15. NubianPrincess

    NubianPrincess Perpetually Bored
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    BTW Cerb, i'm laughing my @ss of at the change in your avatar :)
     
  16. frank51

    frank51 Senior Member
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    I had CM and the sound passage was pretty bad! Did guys have the Electrochemistry passage it was short but very hard, what did you guys put for the 1st question, it had to do with something turning Blue, I put A???

    BS, what did you guys put for the Rf ratio?

    I hate running out of time and guessing :mad:
     
  17. Cerberus

    Cerberus Heroic Necromancer
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    I think the ratio was like .2 or something (i cant remember exactly but I think i got that one).

    That electrochem passage was pretty hard and one of my last passages at that!
     
  18. Cerberus

    Cerberus Heroic Necromancer
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    What about that one asking about what amphibians are lacking in comparison to reptiles/birds/mammals?
     
  19. jhk43

    jhk43 Senior Member
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    crabs: if 2 of 10 choose...exactly 80, 80+ due to fig 1, fig 2, etc

    sound: both tests dont measure...longitudinal motion rite?
     
  20. Nuel

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    I had form DK, but I think I chose the same things you did except for DNA/leukocytes. I chose erythrocytes (the bastards>)

    For the sound stage I put potential energy. But I think it was heat.
     
  21. Cerberus

    Cerberus Heroic Necromancer
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    I got the same things
     
  22. Nuel

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    I think I chose it couldn't be determined. I thought it was either A or D, but had to go with my gut--went with D.
     
  23. EvoDevo

    EvoDevo Forging a Different Path
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    amniotic egg?
     
  24. aegis

    aegis Primary Care and Aerospace
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    Ya I said amniotic egg too?
     
  25. frick

    frick Senior Member
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    Didn't take the test... but.... wouldn't both gain momentum? If you consider them from their inertial (nonmoving) reference frames, the satellite and the moon will both exert gravitational forces on each other, and both will gain momentum. The satellite will gain more than the moon, obviously, but since it doesn't sound like 'negative momentum' was defined, how could one of the objects 'lose momentum' unless an external reference frame (non-moon and non-satellite) was explicitly defined?
     
  26. dhp98

    dhp98 Member
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    I said SD crabs had more selection pressure because half of them died during the conditioning process also

    I put erythrocytes for blood test question, but i'm thinking luekocytes if its genetic

    I put volume increase make the thing float up because as volume increase the FB force increases making it float

    I put less dense rain layer that why it doenst mix

    i put vg vg+ but wasn't sure

    for PS was it just translational motion (since COM didn't move) or was it also rotational equilibrium also. I put both translational and rotational equilibrium for the crate

    Also would that charge particle accelerate along the magnetopause or something else?

    I hope everyone did well, that damn verbal I really didnt like

    I also wanted to know about this so called experimental section of the test? Do we all get one , if so what section PS V or BS

    I counted 17 orgo questions total that mean BS was 78% bio and 22% orgo
    works for me!
     
  27. blz

    blz Senior Member
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    There is atleast one experimental passage PER section. Meaning at least one passage in PS, VR, and BS is not counted towards your score but used in future administrations.
     
  28. jhk43

    jhk43 Senior Member
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    what makes a better antigen for antibody production?

    simple carbo, carbo with lots of repeating subunits, large protein?
     
  29. frank51

    frank51 Senior Member
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    Yah! the verbal sucked, I think for PS section I just put translational motion, by the way was is vg/vg+ choice B?
     
  30. Treg

    Treg Surgeon in training
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    I am doing a PhD in immunology and a large protein is the answer. Looking back at the passage, it said that carbohydrates could be good antigens, and that complex structure/branching increased antigenicity. The question had a large "repeating" carbohydrate, so I think that they were trying to trick us. Proteins will most always be more "complex". If "large protein" isn't the right answer, then these bastards are wrong ;)
     
  31. Cerberus

    Cerberus Heroic Necromancer
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    Yeah, it was a trick. It stated in the passage that the more complex a something is, the better an antigen it is. They placed that in a sentence refering to carbohydrates though to confuse us! bastards!
     
  32. Cerberus

    Cerberus Heroic Necromancer
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    I too put translational. So far so good for PS:)
     
  33. Persistence101

    Persistence101 Senior Member
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    A large protein may be the real-world right answer but we have to answer according to what the passage tells us... so I went with the large carbohydrates with repeating subunits. What did others put?
     
  34. Persistence101

    Persistence101 Senior Member
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    So it was a trick? the answer is actually a large protein??? :(
     
  35. Cerberus

    Cerberus Heroic Necromancer
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    Yes, I do believe so. The key being "repeating", since it needs variability to be a good antigen.
     
  36. Treg

    Treg Surgeon in training
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    Yeah, I was confused by this, even with my background. However, in terms of antigenicity, the fact that it is "repeating" means that it is a lot of the same thing, so it is less complex than a "large protein" that has a unique conformation and sequence of peptides.

    I am convinced that it was meant to trick people.

    Treg
     
  37. Persistence101

    Persistence101 Senior Member
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    +pissed+ +pissed+

    Please tell me the answer to the last question of the passage was "attenuated virus"...
     
  38. Treg

    Treg Surgeon in training
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    Did anyone get stuck in VR on the dinosaur passage, with the question about "which of the following features of the ichthyosaur are not described directly in the passage?" I was going back and forth, thinking "they are all in the passage...." then finally I figured out that the breathing time was estimated by human experiments, not direct evidence. I swear I used 5 of my spare 10 minutes at the end on this one.

    Treg
     
  39. Cerberus

    Cerberus Heroic Necromancer
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    Thats what i put.
     
  40. Treg

    Treg Surgeon in training
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    Yes, that is right. According to the passage, attenuated virus requires less boosts. In real life, it can stimulate humoral immunity via surface antigens and cell-mediated immunity by infecting cells.

    :thumbup:

    Treg
     
  41. Cerberus

    Cerberus Heroic Necromancer
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    That was one of my last VR questions and i ran out of time and had to guess :mad: :mad: :mad:
     
  42. Doc Martins

    Doc Martins Senior Member
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    I put large protein.. I had the same thinking as Treg.
     
  43. Treg

    Treg Surgeon in training
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    Here is another VR one that got me (Trance passage):

    Which of the following would most refute the author's hypothesis?

    I ended up deciding that a wide variety of animals respond to music with trance, but it was hard to rule out the "deaf person enters trance" choice.

    Do you remember that one?

    Cheers,

    Treg
     
  44. Persistence101

    Persistence101 Senior Member
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    Did anyone get a "Trance" passage for verbal? It was my last passage so I had to guess but what did the "trance" state most closely feel like? One of the choices was being intoxicated by a drug, etc. Does anyone remember the answer to that? Also, what would most weaken the author's arguments? One choice was if the deaf people felt the same trance of the music as others who weren't deaf. what was the answer?

    Did anyone get a "Sorcery" passage? Was sorcery and "Scapegoat" the answer, or was it sorcery and "Societal something"?
     
  45. frank51

    frank51 Senior Member
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    All I remember about that question is that I didn't choose " being intoxicated by a drug" for the 2nd one I put deaf people, overall I think I got screwed in VR because I ended up doing the 2 long passages and ended up skipping 2 short passages (10 questions total) now that I think about it one of those long passages must've been experimental, I hate these bastards :mad:
     
  46. aegis

    aegis Primary Care and Aerospace
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    On the PS section I started to second guess myself. I first wanted to put that the crate was in both transitional and rotational eql. But the question said something about what the observer was seeing, so I thought from the observers perspective the crate was not in transitional eql. So my final answer was just rotational??
     
  47. aegis

    aegis Primary Care and Aerospace
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    there was another answer that said compared a trance state to a religious experiance, thats what I put.
     
  48. frank51

    frank51 Senior Member
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    Yah! now I remember that's what I put as well.
     
  49. Persistence101

    Persistence101 Senior Member
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    I think I put something about being bedridden and reality? I dunno...stupid guess.
     
  50. Cerberus

    Cerberus Heroic Necromancer
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    The author was arguing that it was a social phenomena more than a physiological phenomena. Therefore, the deaf person entering a trance actually supported his point.
     
  51. Persistence101

    Persistence101 Senior Member
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    I put deaf person but that's because I ran out of time and had to guess something.
     

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