nondisjunction
If a gene on chromosome 21 is very close to heterochromatic DNA of the centromere, hence crossing over does not occur then in what meiotic divsion did the error occur in to cause down syndrome in the...
View ArticleNS FL2 - Bio/Biochem Question 5
Can you explain how you can tell that there are 3 good gametes out of this? I only see 2 (the first two arrows on the left). The answer explanation only refers to Figure 1 and no other info.
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When does something become too polar to cross the cell membrane? (Spoilers...
According to the AAMC, serotonin is too polar to cross the cell membrane, as discussed in OG B/B question 17. Here's the structure for reference: But the AAMC says this molecule can cross the cell...
View ArticleSection Bank B/B #58
I really dont get this question; why is Bax absolutely necessary? Thanks
View ArticleAltius Test 1 Question 7 Section 1
Can anyone explain to me why A is correct?? Hyperventilation occurs in response to respiratory acidosis because hyperventilation: A) increases blood pH by decreasing CO2 concentrations B) increases...
View ArticleTBR electrochemistry
So I am reading through the electrochemistry chapter of TBR. They say that metals low in oxidation state is a reducing agent whereas metals high in oxidation state are oxidizing agent. I don't quite...
View ArticleTBR Chem- Carnot Engine Explanation. Help!!
According to The Berkeley Review section on the Carnot Engine: "1. A material that is normally a gas at room temperature and pressure is compressed into a liquid. Condensation is an exothermic process,...
View ArticleWhat's the difference between thermodynamically favored vs. Kinetically favored?
How are you able to distinguish between the two when answering a question?
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light absorbance and complementary colors
If a color is observed in solution (yellow), a molecule must be absorbing the complementary color (purple) of light? This is based on Section Bank C/P #52
View ArticleBR Chapter 1 Passage 8 Questions 51 and 52: Retinal Projecitons
Could someone explain the eyes to me? 51. "As part of a routine eye exam, the following is noticed: if light is shone directly into the patient's left eye, the patient exhibits a consensual but not a...
View ArticlePerception testing in psychology (P/S section bank #28)
Hi, One of the questions I encountered while practising had answer choices that I never heard before (at lease not in TPR and psychology course in college) Could someone explain to me the tests in the...
View ArticleBR Ochem book I passage number II
This passage gives a nucleophilic substitution reaction and then gives multiple data tables of reaction rates in different solvents. One question asks what cannot be concluded from the experiment, and...
View ArticleImproving CARS Reading Comprehension
Hey everyone, I am taking the MCAT on August 20th and am having trouble bringing up my CARS score (granted I just started 2 weeks ago). I've averaging between a 70-75% on the TBR Verbal and NextStep...
View ArticleCan you check my answers?
I'm applying to be a Kaplan tutor, and was given some questions to be able to explain to the instructor. I feel pretty confident about my answers, but I really don't want to mess up so I'd appreciate...
View ArticleLineweaver-Burk Plot for Irreversible Inhibitors?
I can't seem to find any Lineweaver-Burk plots for irreversible inhibition, and I can't quite figure it out. My best guess is that it would look like noncompetitive inhibition, where Vmax decreases due...
View ArticleEnzymes and Trascription
I have two different questions: 1) Do most enzymes in the body only cleave L-amino acids? 2) How many phosphates are attached to the first ribonucleotide when transcription begins. The answer is 3...
View ArticleFunctional Fixedness
Which of the following is a good example of functional fixedness? A) Failing to use a dime as a screwdriver when you have lost your screwdriver B) Not being able to solve a physics problem because you...
View ArticleReaction product chirality AAMC FL #41
Hi, One of the questions on the full length asks: What factor explains how a single stereoisomer is formed in Reaction 2? The answer is that the enzyme is chiral and the reactants are not chiral. Does...
View ArticleHeat exchange
If two cups are in thermal contact with each other, one has 250 grams of water at 100 C and the other has 250 grams of water at 0C - I know that once thermal equilibrium is reached, the water in both...
View ArticleStrength of nucleophile
Why is HS- a stronger nucleophile than H3CS-? I would think the H3C would act as an EDG and therefore push electron density onto the S, therefore making it more able to give up electrons as a nucleophile
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