<p>“but otherwise the only questions that should have had multiple answers are the ones that clearly requested more than one answer.”</p>
<p>Oops…I definitely put multiple answers for a few questions that didn’t ask for them. Single answer questions are good for people like me, who have rusty bio knowledge but can still recognize terms. Multiple answer questions require very precise knowledge. Kudos to the people who did well on those questions.</p>
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In ER-associated ribosomes, translation precedes translocation, so this is not a counterexample. You bring up a valid point with mitochondrial ribosomes, though! Did the question specify anything beyond simple “translation”?</p>
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It’s not clathrin. Depending on what the question asked, SNAREs could be right.</p>
<p>The choice, verbatim, was, I believe, “translation always begins in the cytosol”.</p>
<p>Oh, I was referring to the question, rather.</p>
<p>I suppose, given the wording of the answer, that one could argue the site of mitochondrial translation, the matrix, being that organelle’s equivalent of the cytosol.</p>
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<p>Yesss. hope. </p>
<p>And omg wth with Semis release date. -_-</p>
<p>Clathrin deals with the formation of vesicles. SNARES deals with the fusion of vesicles. I didn’t think the question asked about the fusion…? And don’t similar geography characterize species? Think about the finches though.</p>
<p>I bet only 500 people make it to semifinals.</p>
<p>^ I’ll take you up on that, $1000. I win unless it’s exactly 500 ^.^</p>
<p>^^I’m pretty sure SNARES is right, the question asked about vesicle targetting.</p>
<p>SNAREs are involved in targetting, because vesicles can fuse only when the correct vesicular SNAREs and target membrane SNAREs interact. I should mention, though, that if the question asked for, as oldguy433 said, “directionality of vesicles,” then the correct answer could instead be, for instance, motor proteins.</p>
<p>semis release date is still tomorrow isn’t it?</p>
<p>If I understand Wikipedia correctly, v-SNAREs and t-SNAREs are separated by their being target destinations or not?</p>
<p>Also, does anyone know the answer to question about growth cones and axon extension? Among the choices were Netrin and Slit.</p>
<p>I think its going to be thrown out cuz there wasn’t a choice involving ONLY CAM and Netrin, if it asked for stimulation. There was a choice involving both CAM and Slit, but that’s inhibitory… If they asked for just the involving, then it’s all of the above. What did you guys get for the one about the homooligomeric and heterooligomeric proteins? Slowing down of the activity (choose the false one for the homo-oligomeric protein)?</p>
<p>does anyone know when the semifinalists announcements come out?</p>
<p>I checked the website yesterday and it says this week… whatever that means… maybe today, maybe Friday, dunno.</p>
<p>Has anyone received their scores? What was the cutoff?</p>
<p>cut off was 21
highest was 35
average 14.4
but individual scores are not up yet.</p>
<p>I heard highest 36 from my bio teacher. Individual aren’t up yet.</p>
<p>I think this is the lowest cutoff USABO has had EVER.</p>
<p>samgunno is right. The highest is 35. Believe, or not, someone did get a 0. Probably due to negative scoring on multiple-answer questions. </p>
<p>And the cut-off just made my day :)</p>
<p>AHHHHHH!!!
they subtract points for wrong answers!!! i thought there was no penalty!!! NOOOOOOO!!!
I think I’m doomed</p>