"Official" 2014 USABO thread

<p>it was still a right shift though. no matter what BPG the question was asking about, right disaccharide?</p>

<p>I believe the question said something like this:</p>

<p>For the next n questions, put true or false. Which of these causes increased unloading of hemoglobin?</p>

<p>k. 1, 3 DPG</p>

<p>It might have been true but the reason I put false is because it does not <em>directly</em> cause increased unloading.</p>

<p>we know that 2,3 causes R–>T. But you’re saying some of us misread the question and it actually said 1,3 BPG?</p>

<p>NO. he’s saying the question claimed it was 1,3 but in actuality its the 2,3 that does it so the answer was false </p>

<p>I think 1,3 DPG DOES cause increased unloading. Here: " Low oxygen levels trigger a rise in 1,3BPG levels which in turn raises the level of 2,3BPG which alters the efficiency of oxygen dissociation from hemoglobin."</p>

<p>and you know where i got that from</p>

<p>and doesn’t bohr shift specifically refer to unloading due to decreased pH?</p>

<p>Ok, I’m gonna have to agree with chessnbio on this one despite the fact that I guessed falsr :frowning: but I think we should drop this since we’'re getting nowhere and move on to a different question</p>

<p>^agreed </p>

<p>wait
why the heck would they ask about 1 3 bpg
who even knows 1 3 bpg
what is this
wat wat</p>

<p>when do results come out again?</p>

<p>april 16th. did anyone notice how many reused questions there were? as in a lot </p>

<p>really? i only saw like 5…idk if that counts as a lot or not…</p>

<p>I only saw like two… What were the repeats?</p>

<p>any chance that scores will be released early?</p>

<p>remember the one about bidirectional depolarization and action potentials? those were repeats. also there were a bunch of others that they either worded differently or modified. </p>

<p>What did you guys get for the following questions:</p>

<p>What plant would be in the pelagic zone? ( this was a question right?) it had choices that were phytoplankton, water lillies etc</p>

<p>What were the answers to the IPSP question?</p>

<p>The pelagic ecosystem is based on the phytoplankton which occupy the start of the foodchain.</p>

<p><a href=“Pelagic zone - Wikipedia”>Pelagic zone - Wikipedia;

<p>Do you guys know the answer to the plant nutrition question with the deficiency of chlorophyll and root strength and such?</p>

<p>And, what were the answers to the IPSP question of the post synaptic nueron?</p>

<p>the hibernation question which asked what all hibernating animals do not do?</p>

<p>And, the question about what no fish does while swimming? (the breathe above water question)</p>

<p>What amino acid moved 5.5 on the chromatography paper test?</p>

<p>How much light do photosynthetic organisms take from the suface area of the earth? </p>