gluconeogenesis question
View attachment 203272 To clarify, the net deltaG < 0 for gluconeogenesis only when considering the ATP hydrolysis involved, correct? PS I hate the new KA layout. /end rant
View ArticleKaplan FL 8 B/B Question Spoiler
View attachment 203336 Could someone please explain what double crossover's product is? What counts as a double cross over?
View ArticleAltius 3 C/P #7
View attachment 203335 I don't get how C is the answer. If you dissolve both CaF2 and CaSiO3 in water, won't the Ca2+ be the same as SiO3 due to common-ion effect?
View Articleglucose ring opening question
View attachment 203391 What would be the best way to describe glucose ring opening? KA says hydration, but I don't think water is being added? I just think of deprotonation of the hydroxyl O-H, the...
View ArticleAAMC Unscored Behavioral Sci #23
I was under the impression that James-Lange was: Event --> Physiological --> Interpretation of physiological --> emotion which is why I picked C. Can someone explain why the ans is A? Is there...
View ArticleQuestion about systole and diastole
During systole, do both the atria and ventricle contract simultaneously? How about during diastole, do both relax simultaneously?
View ArticleBuoyancy Confusion
So I just had a quick question and hope someone can clear it up. If an object i.e. a cork is submerged in two different liquids, liquid A and liquid B, of different densities, will the bouyant force...
View ArticleProtonation/deprotonation priorities?
Say I have H2N-CH2-CH2-OH. Which side gets protonated first and why?
View ArticlepKa2 for H2SO4
View attachment 203462 The answer is (C) I and II only. Should HSO4- be considered weakly acidic? I know that H2SO4 fully dissociates, but I wasn't sure how to think of HSO4- for MCAT purposes.
View Articlenucleophilicity and atom size
I came across a question based on whether Se was a better nucleophile than S. Se is bigger so I figured it was a worse nucleophile (thinking of bulkier nucleophiles from organic). Does nucleophilicity...
View ArticleQuestion about substituting a positively charged amino acid for a neutral...
An acidic Glu residue in a protein (neutral in its protonated form) has a pKa value of 2.3 in the wild-type protein and is found near a neutral Ile residue. What will be the effect on the pKa of the...
View ArticleBuoyant Force
Can anyone explain why the acceleration of an object that is submerged under water doesn't depend on it's volume? The buoyant force equation is F=pVg, so wouldn't increasing volume increase force and...
View ArticleDNA to mRNA questions
Does anybody know if on the MCAT, for problems where we have to transcribe a sequence of DNA, if the directionality of base sequences will be explicitly given (i.e. 5'-3' vs 3'-5')? I know how to do...
View ArticleKA P/S Passage Question
Could someone help me look at this question. I can't understand how they concluded the relationship to be "strong." Shouldn't there be a numerical value to indicate if something is strong or not? The...
View ArticleJames-Lange Confusion
I've uploaded the question. I was under the impression that in James-Lange theory there was interpretation of arousal. The diagrams I've seen online have differing answers, some have interpretation,...
View ArticleExtraction Question
A first year graduate student treats the below compound with aq. NaOH and heats the reaction for 1 hour. After cooling down the reaction, what must he do to isolate the desired carboxylic acid product?...
View ArticleNeed help with ambiguous wordings
Asked which would lead to an increase in blood pH, consider these two scenarios: 1) conversion of CO2 into bicarb 2) excretion of H+ via kidney How would I interpret what the question wants? For #1,...
View ArticleNS FL #5 C/P #5
I've seen these types of questions before where it asks "What if they thought they were measuring under X conditions when it was actually under Y conditions? How would this change their results?" or...
View ArticleTBR (New Book) Orgo Section VII Question 16 Errata
Hi Folks, -I am not sure if any of you folks have bought the new TBR books. I had a quick question on #16 in Section VII of the Orgo Books under the Carbohydrates Review Questions. In this question,...
View Articlesize exclusion / GC question
View attachment 203580 I chose (D), but the answer given is (C) and I think it's incorrect. Larger molecules will come off the SEC column first, but should have longer GC retention times (higher bp),...
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