Biology 2010 Prep

Test Preparation AP Sciences
661

<p>Could anyone explain the allosteric regulation in cellular respiration with acetyl Co-A?</p>

<p>Thanks.</p>

662

<p>u know the link that thatguyinclass posted for the chi-square [thank u btw] i have a question/statement…?</p>

<p>i think the website has a mistake because if you scroll down to the equation its [observer-expected]^2/[expected], right? but in the equation they put [100-108]^100, it should be [108-100]^2/100, right?</p>

663

<p>Could someone please briefly explain how the Essay portion works. My school choices the most random people to distribute the tests and they screwed some of the APUS kids over by not explaining the directions correctly.</p>

664

<p>I have 2008 biology released exam. trade? pm me what you have.</p>

665

<p>^ just wondering, is it the practice exam or the actual exam.</p>

666

<p>actual actual</p>

667

<p>^
i thought that they didn’t release the actual, but rather only the practice…I understand if you don’t want to, but if it is actual, you would help a lot of people if you uploaded it somewhere…I don’t really have anything to trade except 1999 and 2002 exam (but those are easy to get)</p>

668

<p>I bought it.</p>

669

<p>@derek: you have 90 minutes to write four essays. you just write them all at once.</p>

<p>we were almost messed up in ap calc, our proctor wasn’t going to stop us in between the calc and no calc multiple choice, that would have been baaad news. </p>

<p>does anyone thing there is ANY chance of an essay being on the lac or trp operon… i don’t know them at ALL but don’t want to study for the sake of one or two MC quesitons…</p>

670

<p>It doesn’t look like they’ve asked about operons in the past 9 years, so it just may be a possibility. Honestly, operons are a rather basic concept. It takes about 10 minutes to comprehend. :)</p>

671

<p>alright, thanks SeekingUni, I’ll have to look over them. For some reason, they just confuse me… ahh I can’t wait for this exam to be over!!!</p>

672

<p>Could someone explain countercurrent exchange in the respiratory system? thanks…</p>

673

<p>basically, that is something that works in gills. It allows for the most efficient transfer of gasses as one side of the air flows down on one surface, while, the surface flows in a different direction. basically one going <- and another going -> sorta overlapping. This allows the oxygen to fill every part since if you don’t do countercurrent, the same area will be recieving oxygen even if it has already recieved some…</p>

<p>god i suck at explaining.</p>

674

<p>sent you a pm btw mathlete!! i need that 2008 release!</p>

675

<p>Countercurrent exchange: <a href=“http://163.16.28.248/bio/activelearner/44/ch44c6.html[/url]”>http://163.16.28.248/bio/activelearner/44/ch44c6.html&lt;/a&gt;

<a href=“http://211.67.160.206/jpkc/yuleixue/English/countercurrent.GIF[/img]”>http://211.67.160.206/jpkc/yuleixue/English/countercurrent.GIF

</a></p>

<p>On another note… I just found a huge list of mnemonic devices, for a bunch of different things: [Physiology</a> Mnemonics - DoctorsHangout.com](<a href=“http://www.doctorshangout.com/profiles/blogs/2002836:BlogPost:4254]Physiology”>http://www.doctorshangout.com/profiles/blogs/2002836:BlogPost:4254) :)</p>

<p>

</p>

676

<p>That’s certainly an interesting site… probably one created by someone who has a little too much time on their hands? :p</p>

677

<p>rhdxog…
thank u very much, i actually think i understand it now
so even tho as others have pointed out, its extremely unlikely that it will be on the ap, if it is ill rock that frq/mcq</p>

678

<p>@frenchie: LOL… it’s a doctor’s community. It sure is helpful though! :p</p>

679

<p>Need 2008 release!!! Please pm me!!</p>

680

<p>Doctors who have a little too much time on their hands…</p>

<p>Or maybe this is what they think about during their 9203482930 hour surgeries?</p>

<p>We may never know.</p>