Molarity Question
I suck at molarity and moles which seems incredibly simple but I struggle with it a lot for some reason. This question I came upon some review tripped me up a lot: What has greater molarity: 2 mols of...
View ArticleCharge to mass ratio
Can someone explain how they are determining the charge to mass ratio here? View attachment 196662 For choice B, Sodium: charge to mass is 1/11 and calcium is 2/20. The two are pretty close but they...
View ArticleClassification of Amino Acids (Hydrophobic/Hydrophilic Polar/NonPolar)
There seems to be contradicting information when it comes to classifying amino acids. Textbooks and websites have different classifications. Anybody know which is correct and which is not? How do I...
View ArticleDifficulty of Princeton Review practice questions and passages?
How is the difficulty of the PR workbook passages, online passages, and FLs compared to the real mcat?
View ArticleHistidine Amino Acid, Acidic or Basic?
Is the amino acid histidine an acidic or basic amino acid? TBR lists it as one of seven common triprotic acids with pKa = 6.05 along with arginine (pKa = 13.21) and lysine (pKa = 10.80) However, on the...
View ArticleWhy Histidine is triprotic under biological condition?
what would be the correct choice? Under most biological conditions, however, histidine is considered to be a triprotic acid. This is due to the pKa of the _________ . A. Other nitrogen in the imidazole...
View ArticleMCAT PreReqs
What Pre reqs do I have to take for the MCAT? I've taken Bio 1/2 Gen Chem 1/2 Anatomy Physics 1 I plan to take Physio, Physics II, Orgo 1 and 2 also. I am not sure if I will need biochemistry though?...
View ArticleBest books for Content Review (psychology, physical sciences)
I took the MCAT back in August 2013 and scored a 32, but it will be invalid in the 2017 application cycle for most schools. As such, I plan on taking the MCAT again next April. I will be working full...
View ArticleMitosis and cell cycle
If 5% of the cells are in mitosis in any given time and mitosis takes 1 hour to complete, what is the total cell cycle time for these cells? A. 5 hours B. 10 hours C. 20 hours D. 50 hours How do you do...
View ArticleBuoyant Force
View attachment 196739 Can someone explain this one? I am confused. 1. I know that volume submerged = volume displaced so the net volume of the stuff in the container is the same. 2. mass = density x...
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Endocytosis
The solutions say the answer is A. I get that endocytosis would not happen anymore. But from my understanding, polypeptide hormones bind to extracellular receptors and result in a secondary messenger...
View ArticleBiochem buffer question
CH3-CH2-OH + NAD+ -> CH3-COH + NADH + H+ The rate of this reaction can be measured by following the change in pH. The reaction is run in 1 mL 10mM buffer at pH = 8.6. If the pH of the reaction...
View ArticleCell Cycle and Meiosis
Do the steps of the cell cycle also happen before meiosis I? Like G1 -> S -> G2 -> Meiosis I -> Meiosis II = 4 haploid cells I know that DNA replication takes place before meiosis I but do...
View ArticleIs anyone else using EK 101 (old verbal book)?
I am trying to go through it for extra practice but the solutions are not really clear sometimes. For example, Test 1, Passage 4, Q23 Line 42-43 clearly state that poor and uninsured will be turned...
View ArticleHeroin and endorphin? AAMC The Official MCAT Practice Question section3 Q #14
Why is the answer B? I thought the answer was A because heroin increases endorphin and naloxone blocks the effect of endorphin so injecting naloxone should reduce the effect o heroin...? Note: Naloxone...
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 isopropyl if the methyl was on...
View Articlenegative feedback to control glucose levels
If blood glucose levels are too high, insulin is released by the pancreas to signal cells to take in glucose for energy or storage. If blood glucose levels are too low, glucagon is released by the...
View ArticleNa+/K+ ATPase question
The wording of the correct answer choice to the following question is confusing to me: Na+K+ ATPase is found in epithelial cells that produce urine or other excretions that are hypertonic relative to...
View ArticleFor those that did well on the MCAT 2015?
Hello, I recently got back my MCAT score and I've been really upset for the past few days. I plan to retake, as my score was incredibly low (499). For those of who you did well (508-509+) what...
View ArticleHow is the Haldane effect diff from the Bohr effect?
I looked them up on Wikipedia and they seem the same to me.
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