ek exam #3 cars #8
No matter how many times I read it I feel like answer B fits better. Why is the answer C?
View ArticleChemistry 2 question
A buffer is prepared in which the ratio [HCO3-] / [CO3^2-] is 4.0 a) What is the pH of this buffer (Ka HCO3- = 4.7 x 10^-11 b) What is the pH of the buffer if .0100 moles of HCL are added? c) What is...
View Articlemol of solute vs mol of ions
(From AAMC FL1 C/P #58) What volume of a 0.120 M CaI2 solution would contain 0.078 mol of SOLUTE? Easy enough: 0.120 mol/L = 0.078 mol/xL xL = 0.650 L (Next-Step Science Diagnostic) 72g NH4Cl is...
View ArticleCapacitance
I get that if we charge a capacitor with a battery, we can then discharge the capacitor across some load like a light bulb. I'm sort of hazy on the concept of whether the voltage/charge will be the...
View ArticleAAMC Section Bank BB#96
I picked the right answer for this, but was wondering about 2 things: 1) What do the double stars signify in the first graph? 2) Just to make sure, if it had been positive feedback at the level of...
View ArticleBio Systems Questions EK Pg141
Hello SDN!!! I have a question Im really confused about from the EK Bio systems book. Pls help! Thanks! Negative selection takes place in the corticomedullary junction of the thymus where developing T...
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AAMC Section Bank BB#97
Just wondering, are we required to know the structures of the intermediates in the metabolic pathways? I was pretty thrown off by this question. Spoiler: question
View ArticleBond Energy and Stability ?
I'm having a hard time conceptually making sense of high E bonds and energy release. I've learned that bonds store energy and so was under the impression that breaking a bond would release Energy but...
View ArticleAAMC FL 2 scored Questions [Spoilers]
Hello everyone I have a few questions on the AAMC FL 2 scored exam. Bio question 43: For this one, can someone explain it to me? I literally have no idea how this makes sense. How can you add a...
View ArticleEK Bio Lecture 1 Exam Q 17
Hi, I was working through this passage in the EK bio book and do not understand question 17 at all. Even after reading the passage, question and answer a couple of times, it still does not make sense....
View ArticleWhat determines entropy?
I know that 1. Entropy decreases from Gas > Liquid > Solid 2. 2 moles of a substance has more entropy than 1 mole 3. Greater molar mass/complexity means more entropy Is there anything else I am...
View ArticleInsulin resistance
This is probably silly question but why is it that more insulin is produced when cells display insulin resistance? What's the point of producing more insulin when the cells are already resistant to...
View ArticlePolarizability and Inductive Effect (TPR FL)
P is supposed to represent lipophilicity in the graph. The passage states that there is "1) an increase in polarity with the inclusion of polar C—F bonds, decreasing P, and 2) a decrease in the overall...
View ArticleC/P SB re gel electrophoresis spoiler for #69
View attachment 202945 Why is HP considered "more compact", wouldn't that imply it is heavier? I thought lighter molecules during native gel electrophoresis (or any kind of gel electrophoresis) travel...
View ArticleKhan academy Bio passage HIV
For this question is GP120 better for vaccine than GP41 because 120 is more exposed?
View ArticleAAMC scored Test B/B #59
Hi, How do I know the maximum number of amino acids that can be formed from an X number of mRNA bases? I understand that 3 bases = 1 codon = amino acid. But I also know that the 3rd base is a Wobble...
View ArticlePhosphoric Acid
This is just a minor question for NS exam 4, but they identify roman numeral II as phosphoric acid. Isn't Na2HPO4 just hydrogen phosphate? Would it still be included in a buffer solution if it's not...
View ArticleVideos for Biology, Microbiology and MCAT. Over 250 videos...
MCAT, Biology, Microbiology and branches - YouTube
View ArticleSection Bank P/S #74
I think I missed the mark on this passage, but just wanted to clarify this question: Proponents of the SG hypothesis would expect that, compared to others, an individual prone to depression is: a. more...
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