<p>honestly except number 3, i felt kinda lost, What the heck did #1 ask, im still confused, did they ask about suff like glucose? or stuff like lysosomes, and breakdown of peroxide.
What macro molecules, can someone gove me an idea what they where taking about, im so angry with that question cause i didnt know what they where asking, 2 was ehh so so, 3 was so simple wow that was an easy one, 4 hard, yeah hard. so anyone #1, lets here it</p>
<p>I thought it ment like... proteins, lipids, and cholesteral?</p>
<p>macromolecules, i used proteins (specifically transport), cholestrol, and phospholipids.</p>
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macromolecules, i used proteins (specifically transport), cholestrol, and phospholipids.
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<p>Me too! But I blanked on what cholesterol did. Was it something like either cell shape or permeability?</p>
<p>It stabalized the membrane~ made sure the lipids didn't move too fast when it was hot and move to slow when it was cold? something like that. My cholesteral pararaph was pretty weak ^^;</p>
<p>Dang, oh well. The rest of them I guessed and go so woot! The circle question from hell... not so much.</p>
<p>For the macromolecules, I couldn't think of cholesterol and thought we needed something beyond phospholipids, so I used transport proteins, proton pumps, and signal proteins.</p>
<p>hmmm i wrongly interpreted macromolecules and wrote about channel proteins, receptor proteins, and recognition proteins, but also talked about the phospholipid bilayer and cholesterol... grr.</p>
<p>Cholesterol is not a different macromolecule than phospholipids... they are both lipids. The correct way was to use proteins, lipids, and carbohydrates as the 3 major MACROMOLECULES. Then you could have described phospholipids and cholesterol as types of lipids, transport, peripheral and transmembrane as types of proteins, and finally the glycokalyx as the major carbohydrate portion.</p>
<p>I have never hear of that before in my life... glycokalyx... oh well, I just hope I answered the quesitons well enough for a 5.</p>
<p>there's also the glycocalyx on the outside of the membrane. still a part of it; it's a oligosaccharide attached to phospholipids. serves in cell recognition; it acts like a cell fingerprint, you could say.</p>
<p>if you needed a carb in the molecule.</p>
<p>Isn't cholesteral a steroid... or was that something else</p>
<p>yeah, i forgot about glycocalyx. however I believe that there are many areas in which you could earn all the points and not necessarily have to address it.</p>
<p>Wait guys, isn't there carbohydrates in the plasma membrane. They're not very important, but they're in the form of glycoprotein ( i hope i put that on the test..) but nevertheless they have a seperate funtion than the proteins. They're carb chains. they helpt o identify the cells.
So thus, i put lipids, carbohydrates, and proteins :)
it says in my book they're correct so,yayy.</p>
<p>also, for question4, one part was: how do you make sure the gene is expressed? what was the answer?</p>
<p>Nikkigirl12 ...to figure out if the gene was expressed, literally to find out if the plasmid has been inserted, you could do an experiment to see if the gene did what it was supposed to do. Say you insert the gene that produces the enzyme luciferase that makes fireflies glow. Well if you bacteria glow you know that the gene was inserted. Also most plasmid carry resistant genes to certain bacteria. If the bacteria grows in the presence of the bacteria it is resistant to you can say that the plasmid was inserted. If it dies...well the plasmid probably was not inserted.</p>
<p>i must be stupid, i thought there were supposed to be lab designing free response questions?</p>
<p>Why did the forum admins make such a big deal about not talking about the MC questions or FR. Last time I checked, our grades were contingent on obeying the rules, not the existence of this web site. It's not like College Confidential is going to be shut down.</p>
<p>Yes I was talking about the glycokalyx on the outside surface of the membrane for cell recognition.
Yes cholesterol is a steroid but a steroid is one of the major subgroups of LIPIDS!</p>
<p>also for the development of the neural tube is the following enough:</p>
<p>upper ectoderm > neural plate > rolling up of neural cylinder from plate > neural tube formation from cylinder > rolling off of cells forms neural crest > leads to head, sense organs and facial muscles.</p>
<p>was there anything else to write about?</p>