<p>Very good.</p>
<p>[ul] [li] Mad cow disease is caused by a [/li][list] <a href=“A”></a> Virus
<a href=“B”></a> Prion
<a href=“C”></a> Bacterium
<a href=“D”></a> Genetic mutation
<a href=“E”>*</a> Plant toxin [/ul][/list]</p>
<p>a prion? again not sure</p>
<p>Well its not a virus, bacterium, mutation, or plant toxin…</p>
<p>Yes, it is a prion.</p>
<p>A question relating to prions…</p>
<p>[ul] [li] Prions are[/li][list]<a href=“A”></a> Bacteriophages that cause disease
<a href=“B”></a> Infectious proteins
<a href=“C”></a> Bacteria that infects viruses
<a href=“D”></a> The cause of sickle cell anemia
<a href=“E”>*</a> Introns that have been excised from a strand of mRNA [/ul][/list]</p>
<p>Prions are B) Infectious Proteins.</p>
<p>Prions interest me so much… Kuru is insane.</p>
<p>61 DAYS… lol in 54 days, we’ll be able to say 7 days…</p>
<p>Does anyone care to explain what an allosteric inhibitor is?</p>
<p>Prions suck! We watched this movie about this Italian family that couldn’t sleep because of the damage that prions did to their brain. They slowly lost ALL motor skills and died after 9 painful months of escalating dementia and perpetual sleep deprivation. It was horrible:'(</p>
<p>If you didn’t understand his explanation, imagine an enzyme has two active sites (places where the substrate binds to). In allosteric inhibition, the inhibitor, or the fake substrate, binds to one active site which causes a conformational change in the second active site. Because substrates are shape specific for each enzyme, the substrate can no longer bind to the enzyme and the reaction is turned off.</p>
<p>^Thanks, that’s a better explanation than what I could get from my textbook.</p>
<p>Mifune, do you have any mc questions on inhibitors? I could use the work.</p>
<p>No, I don’t have any from my resources, but I can invent a few.</p>
<p>Questions 1-5 pertain to the following five choices:</p>
<p>[ul] <a href=“A”></a> Competitive Inhibition <a href=“B”></a> Noncompetitive Inhibition <a href=“C”></a> Allosteric Inhibition <a href=“D”></a> Feedback Inhibition <a href=“E”>*</a> Cooperativity [/ul]</p>
<ol>
<li><p>Characterized by conformational change of the enzyme and involves two active sites, one for a substrate, the other for an inhibitor</p></li>
<li><p>Compounds that resemble normal substrate molecules attempt to occupy the same active site on the enzyme</p></li>
<li><p>Involves the stimulation of an enzyme to become more effective as more substrates bind (such as hemoglobin’s greater affinity for oxygen as more bind to its surface)</p></li>
<li><p>The inactivity of a metabolic pathway caused by one of its end-products</p></li>
<li><p>Two or more separate substrates do not resemble each other, yet the binding of one prevents the binding of the other(s)</p></li>
</ol>
<ol>
<li>B</li>
<li>A</li>
<li>E</li>
<li>D</li>
<li>C</li>
</ol>
<p>Is that correct?</p>
<ol>
<li>C</li>
<li>A</li>
<li>E</li>
<li>D</li>
<li>B</li>
</ol>
<p>Quick question: Why are most of you science majors planning on taking the exam? This question is only for those who will major in science.</p>
<p>Yes, the answers in #174 should follow C, A, E, D, B</p>
<p>
</p>
<p>I am primarily taking the exam for the sake of entering a higher-level biology course in college (I am also concurrently taking a higher-level course through my state university to supplement my independent study of AP Biology).</p>
<p>Also, the University of Chicago has an “AP5” sequence, which allows students who received a 5 on the AP exam to enroll in an accelerated track upon attendance. I have applications elsewhere, but additionally, this is one of my primary motivators.</p>
<p>[ul][li]Which level of protein structure is most related to specifity?[/li][list]<a href=“A”></a> Tertiary
<a href=“B”></a> Primary
<a href=“C”></a> Secondary
<a href=“D”></a> Quaternary
<a href=“E”>*</a> Allosterism [/ul][/list]</p>