<p>Does anyone know how hard the Bio Cliffs practice exams are compared to the actual exam?</p>
<p>^They’re very similar to the questions i’ve seen on released AP exams.</p>
<p>ok, i’m reading the body systems part in the cliffs, and it is KILLING MEEEE!! i haven’t learned any of this inclass. can anyone tell me what parts to skim and what parts to pay attention to?!!!</p>
<p>not sure if this has been posted on biology, but if you are interested in what test scores produce what AP scores, this might be useful for you: [AP</a> Pass - AP Biology Calculator](<a href=“http://appass.com/calculators/biology]AP”>AP Biology Test Score Calculator - AP Pass)</p>
<p>Which practice tests are the best for practice and approximately the same as the AP test?</p>
<p>Options: Barrons, Kaplan, Princeton Review, Cliffs</p>
<p>any essay predictions/ general frq focus points?</p>
<p>I’m feeling pretty confident. I took the 2008 released exam and got 68 right, 20 wrong, which yields a score of 64. According to the list of curves (in a thread around here somewhere), that puts me in the field of a 4. If I can get some points on the FRQs, I’ll be good for a 5!</p>
<p>The released exam was truly much easier than I would have EVER imagined or expected. The questions were not highly specific whatsoever, and I found it to be a breeze. I finished with 45 minutes left, and I still did pretty good. Just don’t worry, be positive, and feel confident! We will all do fine!</p>
<p>I got around that range, but I think you/we would have to have to do really well on the FRQ’s. Around a 7 average, or maybe 6.5, which is quite difficult. (The graders look for specific criterion).</p>
<p>can someone explain cell communication?
i dont understand what G-Protein or cAMP do</p>
<p>Basically a receptor protein binds to a signal molecule (the ligand) which is on the plasma membrane. This causes some sort of reaction in the cell. A G-Protein helps G-protein receptors. When the signal molecule binds to the receptor protein, it activates a G-protein, causing it to bind to a molecule of GTP in place of GDP- when it is bound to GDP, the G-protein is inactive. (GTP, or guanosine triphosphate, is similar to ATP.) The activated G-protein then leaves the receptor and binds to a previously inactive enzyme and alters its activity, which in turn leads to a cellular response.</p>
<p>and what does cAMP do? (all i know is that it is read cyclic AMP)</p>
<p>SeekingUni, do you happen to know the grading rubric for the released 2008 exam? and can you possibly send me the answers to the test? my teacher is quite ■■■■■■■■ and is giving us the answers in a review session the sunday before the exam…</p>
<p>^^cAMP is a derivative of AMP, which is a derivative of ATP (minus two P). It is used as an indicator–when cAMP levels rise, the cell starts producing ATP. (I think.) Because use of ATP produces cAMP…</p>
<p>cAMP is part of many pathways. especially noted is in g-protein transduction.</p>
<p>activated gprotein stimulates adenylyl cyclase which proceeds to convert amp to camp. this pathway is used in the insulin transduction pathway.</p>
<p>also involved in the action of cholera toxin. overstimulated adenylyl cyclase results in large concentrations of sustained camp that causes release of ions/etc. into digestive system. loss of water. etc.</p>
<p>Explain the lac operon.</p>
<p>Lac operon controls the uptake of lactose in E.coli. A regulatory gene produces an active repressor which binds to the operator region. As the operator region is occupied by repressor, RNA polymerase cannot transcribe structural genes that code for enzymes that control the uptake and break down of lactose. When lactose is available, some of it (in a converted form)combines to the repressor and make it inactive. As repressors become inactive, RNA polymerase is now able to transcribe structural genes that code for these specific enzymes. Since lactose is required to turn on the operon, the enzyme produced is called an “inducible enzyme”.</p>
<p>yup, thats the lac operon…
Now for a really easy one…
HIV primarily attacks which of the following types of cells?
A)Red Blood Cells
B)Epidermal Cells
C)White Blood Cells
D)Gilial Cells
E)Neurons</p>
<p>C 10char))</p>
<p>I took Practice Test 1 from the CliffNotes review book as a diagnostic test with no study or review beforehand.</p>
<p>Multiple Choice (out of 100): 74 correct, 22 wrong, 4 blank
Essay 1: 9/10
Essay 2: 9/10
Essay 3: 8/10
Essay 4: 3/10 (haha, I couldn’t remember much about muscle contraction)</p>
<p>Scoring Rubric:
MC: # correct-0.25 x incorrect (74-0.25x22)=68. 68 x 0.6 = 41/60
FRQ: 9+9+8+3=29/40
Total=41+29=70/100</p>
<p>61-100=5
47-60=4
39-46=3
30-38=2
0-29=1</p>
<p>The good news is that I got a 5 with no studying/review, the bad news is that the exam is 3 days away and I haven’t started reviewing yet…</p>
<p>^ Your bad news isn’t really bad news… since you already have a 5 pretty much guaranteed. Have you taken any of the released exams?</p>