June 2012 SAT II Biology

<p>how is eight wrong a 40 raw?!</p>

<p>Does anyone remember the question from the ecology section that had a species of mouse put in an environment with dark rocks and light sand and what would happen to the coat color over time?</p>

<p>^I put that two types of mice would appear (mostly white and mostly black).</p>

<p>On E there were like 5 questions on a net productivity chart. Anyone remember their answers?</p>

<p>Hi, I’m new to this :slight_smile:
I took molecular yesterday and I have a few questions I’m unsure of but want to know the answers. Could anyone say what they put for these please? I looked through the forum and there are different answers coming up…

  1. The one with the insects and the tree…I just picked negative slope. I guess that would be wrong, but I’d like confirmation that it’s the bell curve.
  2. The one about the bond on the amino acid. Which one was it?
  3. The one about the muscle and the ATP. I don’t remember what it was asking but maybe something about the role of ATP in muscle contractions. I put ATP becomes ADP or something…
  4. I can’t remember the last question much, but I know it had to do with muscles. The answers were something like: chemical, electrical, synapse, etc. I put synapse, but I’m pretty sure that’s wrong.</p>

<p>1) if youre talking about how most of these bonds are made, then it was the dehydration synthesis choice. im not sure if this is the same question though
2) im pretty sure the answer was how myosin hydrolyzes atp to adp and p and uses that energy to bind to actin or something along those lines (can someone clarify this? :c)
3) so i put chemical for this choice, because they were talking about the neuromuscular junction where the neuron activates muscle contraction. the signal passes from a neuron to a muscle through neurotransmitters, which are “chemicals” that transmit signals from the neuron to the target cell, in this case the muscle, across a synapse. i remember acetylcholine is the neurotransmitter that is involved but im not 100% sure if this is right lol.</p>

<p>For the bond one, I meant which bond number was it?</p>

<p>And for the chemical one, I think you’re right. :slight_smile: I’m an idiot for thinking synapse.</p>

<p>Also, what’d you get for the tree one with the insects?</p>

<p>lalala321, you get 42 of them correct, which gives you a raw of 42 first. But since you got 8 wrong and 1/4 point is docked off for each wrong answer, 8/4 is 2, subtract that from 42 → 40.</p>

<p>tenisgirl, I got net community production for the 3rd one. Basically if a question was asking about the energy produced by producers, it was asking for gross primary production. Taking into account the energy used during respiration for producers would be net primary production. And finally, energy used during respiration for both producers and consumers would yield net community production.</p>

<p>Piano68, tree one w/ insects is still in debate over negative slope or bell curve, but most people think it’s bell curve.</p>

<p>Isn’t there a total of 80 questions?</p>

<p>Also, what do you guys estimate the curve will be?
I used Barron’s to study for it. In the back, there are two practice tests with scoring instructions. On both, they say a score of 76 is still an 800 of the molecular test. Is this a good estimate for the real test as well?</p>

<p>Ohwow sorry, I’m totally mixing this up w/ math. Raw of 70. </p>

<p>Piano, I’m not sure b/c each book is different. Barron’s also says that E lets you get a raw of 73 or something and still get an 800, but CB says differently, I think.</p>

<p>Per the Official Study Guide for all SAT Subject Tests:</p>

<p>How to calculate the raw score:<br>
Step 1 - Out of 80 questions (Biology SAT 2) count how many you got right, how many you got wrong
Step 2 - count how many right answers
Step 3 - count the number of wrong answers
Step 4 - Multiply the number of wrong answers by 0.25
Step 5 - Subtract the total you obtained in step 4 from the total you obtained in step 2
Step 6 - Round the number obtained in step 5 to the nearest whole number</p>

<p>or if you got 8 wrong and no blanks, it is simply 80-(8x1.25) or 80-10 or 70. 70 is a 750 for E and a 760 for M. That is awesome!</p>

<p>For those of you trying to get 800 - a raw score of 77 is needed for both E or M. A raw score of 76 is 790.</p>

<p>You have the official chart? Can you please tell me what the lowest raw score I can get for bio E to get an 800 is?</p>

<p>Isn’t the curve different for E and M…</p>

<p>Yeah, but it’s hard to tell whether E or M has the more lenient curve b/c different books say differently.</p>

<p>Does anyone know for sure what the answer to the experimental and control graph was? Was it the slightly steeper or the steeper one?</p>

<p>Ok, I have a few more questions just to clarify. Thanks for answering everything! This is on the M section, I think:

  1. There was a part with pictures of five animals: shark, whale, starfish, dinosaur, and bird. Which animal is most similar to primates? That would be whale, right, because they’re both mammals and chordates?
  2. Then they also asked what order each organism appeared. What order would it be?</p>

<p>Was this for the vine experiment? If so, I’m fairly certain it was C. It showed a graph where both lines started at about the same point. More specifically, the artificial vine line was actually slightly above the real vine line at the starting point. Then, the line for the real vine was steeper than the line with the artificial vine.</p>

<p>The 5-picture one was general questions. Yes it was whales b/c they’re mammals. All of the animals were chordates except for the starfish.
The order was starfish, shark, dinosaur, duck.</p>

<p>What I meant was, the starting point for the artificial was slightly above. Then, the real vine quickly shot up and was steeper than the artificial vine line.</p>