June SAT Biology E/M Pre/Post Test

<p>caperi, I do believe they were growing down. I know they looked like it was all in different directions, but if you looked closer, the side two were growing slightly downwards, the top one was straight, and the bottom one had this hooked root thing which was pointing down</p>

<p>So in that case how would the seeds actually stay on the petri dish without falling off?</p>

<p>and the other choices didn’t make sense to me… temperature wasn’t measured, pH is irrelevant, and there was no light source to measure phototropisms</p>

<p>i dunno, but it said in the description that the petri dish was on its side</p>

<p>i believe the petri dish one was thigmotropism because the plants were growing toward eachother to the middle, and then you see that they were “backing away” from eachother. This is a sensitivity of touch.</p>

<p>I’m not sure if this was already answers, but the fungi is only decomposers and parasites. I fell for collegeboard’s trick too, fungi often have symbiotic associations with photosynthetic organisms so I said it was autotrophic, which is incorrect.</p>

<p>the pictures look like the question from the test… [Experiment</a> of the Month - Gravity and Seed Germination](<a href=“http://www.sciencemuseumgifts.com/EOTM/EOTM_10_gravityseed.aspx]Experiment”>http://www.sciencemuseumgifts.com/EOTM/EOTM_10_gravityseed.aspx)</p>

<p>Does anyone remember what they put for the question asking which form of the DNA helix was correct, with the 5’ ends and the 3’ ends on either side? And what about the one which asked which property of water makes it so unique? I remember picking an answer that related to polarity…</p>

<p>Hold onnnn. So is petri dish one gravity???</p>

<p>Yep I remember seeing a similar question before</p>

<p>@ twp - i put the one where the 5 was on the left top, 3 was on right top, 3 was on bottom left, 5 was on bottom right. I think that’s the one that had 3 answer choices with the same 5-3 pattern. then i chose the one with the correct base pairing. and yeah, uneven distribution of electrons.</p>

<p>@kim - that’s what i put. there’s been dispute.</p>

<p>The answer to the water was the one about uneven share of electrons.</p>

<p>For the DNA one I put 5’ on the top left and the top right and 3’ on bottom left and bottom right.</p>

<p>…wait. does anyone remember if the 5-3 thing I described was indeed the one with 3 choices that matched that pattern? I hope i put the right answer…</p>

<p>okay canbambi, maybe you’re right. I don’t really remember anymore. I only know it was the one with 3 choices…</p>

<p>catcat: yeah that’s what i put.</p>

<p>Does anyone remember the answer choices to the property of water question?</p>

<p>Isn’t the DNA question the drawing with 5’ on the top left and bottom right, and 3’ on the top right and bottom left? So it would be something like:</p>

<p>5’ O-O-O-O-O 3’
3’ O-O-O-O-O 5’</p>

<p>I chose B.</p>

<p>2 choices have Uracil in it, so you can eliminated that.</p>

<p>Then you had to choose the answer option that had the One DNA starting with 5’ and ending 3’. And the other starting with 3’ and ending with 5’. You had to follow the stand of the Dna to make sure if it ended correctly…</p>

<p>I agree with hkim’s diagram. That was B? I thought that was… C or something. dunno</p>

<p>No, the correct orientation was
5’ xxxxxxx 5’
3’ xxxxxxx 3’
If you looked at the drawing carefully you would see that the 5’ end was connected to the 3’ end for both strands</p>