B/B Section bank #62 (centrifugation)
View attachment 204817 The supernatant will contain the cytoplasmic contents. But does the pellet contain the organelle precipitates?
View Articlecapacitance
Why does a decrease in distance between the plates increase the capacitance? Also, does dielectric increase capacitance because its molecules with partial charges align with the plates, allowing the...
View ArticleWhy GC pairs more suitable than AT in creating primers?
Having more GC pairs in a primer means a greater Tm. Likewise, I read that having more GC are more prone to errors in PCR. However, the answer to this question, without explanation, says having more GC...
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Kaplan Doppler Question
I don't understand their reason for using the doppler equation in the form that they did. In this case, the sound SOURCE and the sound DETECTOR are the same, so I believe we need to use a different...
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aamc physics question on pulleys that goes contrary to what TBR says. help!!
A force F is used to raise a 4-kg mass M from the ground to a height of 5 m What is the work done by the force F? (Note: sin 60o = 0.87; cos 60o = 0.50. Ignore friction and the weights of the pulleys.)...
View ArticleTPR FL2 #47
Can anyone help me with the parts per million calculation? Thanks! They said the answer is D.
View ArticleTPR FL2 #52
For this question, why can't the answer be A? There is a graph showing how one of the enzymes involved is most active around 70 degrees. Is it because A and B are pretty much same answers? C is the...
View ArticleNS5 Bio/Biochem #40
The answer doesn't make sense. Even the explanation. My thinking: Nbea +/+ (im just gonna say WT) is higher in body weight then Nbea +/- (mutant) Question is asking: what is higher in the Mutant than...
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Valence electron question
Am having difficulties figuring out # of valence electrons in respective subshells- any help will be greatly appreciated! # valence electrons of P in PO4^3- Answer in Kaplan book says: 2 in s subshell,...
View Articlemeiosis
Under a microscope, a first and second polar body look alike. What stucture would distinguish them? A bit confused on this one..... Also, can someone tell me if in meiosis II at the end of it are there...
View ArticleTPR FL 2 Bio section
I am quite confused about #36. For choice B it talks about fluid retention in the lower extremities. Why would this occur? Also, how does being in recumbent position affect shortness of breath in...
View ArticleElectromagnetic Radiation vs Particle Radiation
So I was reading up on Electromagnetic radiation. They are oscillating waves of energy with perpendicular electric field and magnetic field. Here, light behaves like a wave where a higher frequency...
View Articletaxol mechanism
I've taken two practice tests now that have questions on taxol, an anticancer drug that stabilizes microtubules. While the EK test argued that the drug stabilizes microtubules during polymerization in...
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Cd 2+
Why does Cd lose two electrons from its 5s orbital before losing any electrons from its 4d orbital? I thought the order of removal of electrons was the reverse order in which they were...
View ArticleLeucine vs. Isoleucine (iso- vs. sec- naming weirdness)
Hi all. I just want to make sure I'm not crazy here... In orgo, if a side chain had 4 carbons total and one of those carbons was a methyl substituent, we would call it isobutyl if the methyl was on the...
View ArticleIR spectroscopy
So in IR spec, you shoot infrared at a molecule, and certain wavelengths are absorbed. So what exactly absorbs those wavelengths? Bond strength? Bond polarity? Resonance? Specifically, I have no idea...
View ArticleConfusion about ionization energies for ions
There is a question in my EK1001 chem book that asks, "Removing an electron from which of the following would require the most energy?" I could have sworn that I read somewhere that, after forming a...
View ArticleTPR FL1 B/B Q58 "SPOILER"
View attachment 204945 How in the world can Zn(OH)2 act as an acid but Fe(OH)2 cannot? Doesn't the common ion effect have a role or should we assume it doesn't because OH acts like a ligand? Also, both...
View ArticleNS7 C/P Question #27
Can someone explain how entropy is maximized when the system is at equilibrium? The explanation says delta G = 0, which means equilibrium plus there is no work being done How can you translate that...
View ArticleTPR FL1 B/B Q#5 "SPOILER"
I have the slightest clue on what I am supposed to figure out or what this answer tells me. Someone willing to try?...
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