<p>the answer to the "no defined nucleus" one was cyanobaterium right?</p>
<p>blue-green algae (cyanobacteria) have no true nucleus, not green algae</p>
<p>tonyxwang makes a good point with those two questions.</p>
<p>
No, the ribosomes are working fine. They are following the mutated DNA instructions on assembling the protein. The problem is that the protein made results in a malfunction of the lysosome. You can't blame the ribosomes for this one -- they are following orders.</p>
<p>Lipids function to (all three) make cell membranes, insulate, and cushion organs.</p>
<p>Plants adapted to dry land with a waxy cuticle.</p>
<p>The DNA structure had 5' and 3' on the same side, and NO U's!</p>
<p>Tapeworms DO NOT have a digestive tract, and DO NOT secrete a toxin, but they are well adapted for reproducing.</p>
<p>The TAT protein questions:
Inhibiting RNA synthesis would inhibit TAT mRNA AND protein synthesis.
If you inhibit protein synthesis, the mRNA is made because the enzymes to synthesize RNA are already present in the cell.
Glucocorticoids are NOT proteins.</p>
<p>Starch is broken down in the MOUTH and INTESTINE where amylase is present.
The PTH questions:
Remove PTH gland and PTH hormone decreases
Blood calcium also decreases
If calcium goes down to .50, the body responds (by negative feedback) to increase blood calcium levels.</p>
<p>The ectoderm produces the nervous system.</p>
<p>Although fermentation is technically the conversion of pyruvic acid to either lactic acid or ethanol and CO2, none of the answers fit that definition. Fermentation is often used to mean glycolysis AND fermentation. That worked, and it has the production of ATP in common with aerobic respiration.</p>
<p>Mendel was the first true QUANTITATIVE GENETICIST.</p>
<p>Fungus are DECOMPOSERS and PARASITES, but certainly NOT AUTOTROPHS.</p>
<p>does anyone know what kind of raw score u need for a 700</p>
<p>
[quote]
The DNA structure had 5' and 3' on the same side, and NO U's!
[/quote]
</p>
<p>Really the 5' and 3' are on the same side? Ugh...luckily it seems I got the other ones right.</p>
<p>im pretty sure the 5' is opposite the 3' and vice versa</p>
<p>agree with snake, also for the PTH question, when the parathormone goes down the calcium goes up because they are inversely related.</p>
<p>Ooo good I hope Snake and tony are right. But for the PTH question when the PTH goes down the calcium level goes down because PTH increases the calcium level of the blood. They appear inversely related because PTH is regulated by negative feedback, so when the calcium level rises the PTH hormone goes down because the body realizes that the calcium level does not need to rise any more. Removing PTH altogether, however, would make calcium levels go down.</p>
<p>For the biome that produces the most food for humans, I think it may be grassland (I put tropical rain forest though), because grasses/grains are a big part of the diet of humans.</p>
<p>hey, sry if this has been said already, but how many can you usually get wrong to get an 800?</p>
<p>oh yea, and what was the one with the fish and its excretion? urea, uric acid, or ammonia?</p>
<p>i put tropical rain forest..saw that in a review book somewhere. i think that's right.</p>
<p>harvard 2 or 3 tops, and i believe its tropical rain forest; it was uric acid for reptiles. i still disagree with the PTH question because i'm quite sure they were inversely proportional.</p>
<p>fish excrete ammonia. Was this an E question? I don't remember this...</p>
<p>ok so lets get this rite: there were three questions about the parathrome calcium stuff:</p>
<p>the first one was increase or something cuz of the inversely proportional thing</p>
<p>the second one was decrease</p>
<p>the third one was more of something i cant remember will be produced. does everyone agree cuz, i think everyones confused about which question</p>
<p>Tropical forests produce the most FOOD (because they have so many plants and such), but humans might use more food from the grasslands than from tropical forests.</p>
<p>But I hope it is tropical forests, because that's what I put.</p>
<p>^I honestly don't think College Board expected us to think about the question that much. I'm pretty sure it's tropical rain forest.</p>
<p>And for the PTH, I'm almost 100% sure that BOTH PTH levels and calcium levels would drop if the gland secreting PTH were removed. PTH definitely makes calcium levels rise; I remember reading that the night before the test. At first I was confused about the inversely related thing, but then I realized that's it's caused by negative feedback, not because PTH lowers calcium levels.</p>
<p>you could easily be right, i'm quite confused by the question. although this from wiki:
The concentration of PTH is controlled directly by the ionized fraction of calcium (Ca2+) plasmatic. A reduction in the latter involves an increase in the secretion of the PTH, whereas an increase induces the contrary effect. A faster fall of the calcemy involves an increase more marked in the PTH, suggesting a certain capacity of anticipation of this hormone.</p>
<p>yea pth does make calcium rise but only the second one was decreasing... the first one wasnt asking wat would happen to the CALCIUM level if the gland was removed it was asking what would happen to that other thing. If you remove calcium for the 1st question the blood something i cant remember does rise. </p>
<p>Now the second question i think was more specific to the calcium level. I did the same thing and put decrease for both, then read it carefully and put increase. </p>
<p>and agree with tropical rain forest 100%,, it was meant to be an easy question that automatically triggers rainforest in your mind. we get soo much stuff from the rainforest its unbeleiveable</p>