June 2010: Biology

<p>I hope so. I put 4 down.</p>

<p>2 quick questions. </p>

<p>For the one about the virus with RNA and what enzyme it needed, what was the answer, I thought all of them were wrong because the virus would need the enzyme to create DNA from RNA, or reverse transcriptase, not make DNA to RNA or make new RNA, can someone explain?</p>

<p>For the diagram of the plant, which was phloem and which was xylem, also where did they originate, the far left or in the middle.</p>

<p>it was xylem closer to center, the space furthest left was just the pith, phloem was right, keep water was the like outside thing and the secondary xylem phloem was inbetween i think</p>

<p>xylem is the rounder structure closer to the center, phloem is on the outer edge, and the part in the middle is the meristem? that provides the growth for the both of them</p>

<p>the RNA question was it needed an RNA-dependent RNA polymerase to replicate since it is a retrovirus.</p>

<p>For that E question I got 4. </p>

<p>What did you guys put down for substance Z or whatever?</p>

<p>i think it was rna to rna. they simplified the process. retroviruses use reverse transcriptase to turn rna into dna, and then back into rna to create more retroviruses.</p>

<p>It was DNA to RNA i think…</p>

<p>“Retroviruses contain viral RNA and several copies of reverse transcriptase (DNA polymerase). After infecting a cell, the reverse transcriptase is used to make the initial copies of viral DNA from viral RNA. Once a DNA strand has been synthesized, a complementary viral DNA strand is made. These double strand copies of viral DNA are inserted into the host-cell chromosome and host-cell RNA polymerase is used to make virus-related RNA.”</p>

<p>[Retrovirus</a> Replication](<a href=“http://www.accessexcellence.org/RC/VL/GG/retrovirus.php]Retrovirus”>http://www.accessexcellence.org/RC/VL/GG/retrovirus.php)</p>

<p>This paragraph explains that while RNA does Make DNA, the synthesized DNA strand is then used to make RNA from the RNA polymerase. Actually, RNA to RNA does make sense. crap. But DNA to RNA also makes. Can someone remember what the question was looking for? at this point, it comes down to the wording of the question.</p>

<p>in Bio E,
what did you get for the question that gave two areas (Kansas and somewhere else)
that had the same fossils?</p>

<p>i put it meant it had the same geological age. I managed to eliminate some others.</p>

<p>fresh is back woot. haha do you remember any other questions?</p>

<p>black short tailed question was independent assortment then black is dominant over brown.</p>

<p>^yea I also put DNA to RNA</p>

<p>cr*p, do I still have hope for an 800 with -3 and 1 omit?</p>

<p>Did someone get punctuated equilibrium for the snail question?</p>

<p>Yeah. It was in my Barron book.</p>

<p>— Same geological age - that was an utter guess.</p>

<p>@derek: Yes, it was punctuated equilibrium.</p>

<p>is the snail one in E Section?</p>

<p>what did you guys get for the question with the graph and
blood, uterus?
what could be inferred from the grapH?</p>

<p>That it was a steroid hormone that targets the uterus</p>

<p>also, what doesn’t effect the rate of water moving up the xylem?
the choices were adhesion, cohesion soil PH, root pressure, and transpiration</p>