Chromosome, chromatid confusion
So, when are chromosomes found in their liner form vs. The X shaped form? When in the linear form, each chromosome has 1 chromatid and when in X form, each has 2 chromatids? My understanding is the...
View ArticleANOVA, F-test, chi square?
Kaplan presents t-test and z-test in the back of their physics manual. Are there other tests we need to know for the MCAT, or is that it?
View Articlehow does 2,3 BPG leave the cells to affect hemoglobin binding curve?
I understand how CO2 leaves the cell due to the fact that the molecule is nonpolar. However, 2,3 BPG is polar ( https://upload.wikimedia.org/wikipe...ate.svg/220px-2,3-Bisphosphoglycerate.svg.png) , so...
View ArticleRelieve me of my MCAT jitters...
Hi everyone! I am writing my MCAT in about two weeks, and am a bit concerned about my scores on the practice exams. One of my friends said I need to be scoring between 128 and 132 on the practice exams...
View ArticleMechanoreceptor question
I just did a practice psych passage on Khan Academy, and basically it was talking about pressure being applied to someone initially, and then this pressure continuing to be applied. The question asked...
View ArticleGraves Disease - confusion regarding feedback inhibition
taking a practice exam and got this problem wrong: "Graves’ disease is an autoimmune disorder in which autoantibodies are formed against thyroid stimulating hormone (TSH) receptors on the thyroid...
View ArticleQuestion about subshells
For Co (II), why is the orbital diagram [Ar]3d7 and not [Ar]4s2 3d5? My understanding is the following: The valence electrons are lost. These electrons are having the highest energy. Therefore,...
View ArticleQuestion about periodic table trend.
So I understand that as you go right across the periodic table: electronegativity, ionization energy, electron affinity increases and as you go up the periodic table, the same holds true. My question...
View ArticleRelation (Math) question with roots and squares..
Statement from passage: "Each f-value in the table is greater than the preceding one by a factor of √2, and this corresponds to a factor of 2 decrease in light intensity." The question asked this:...
View ArticleConfused with Khan Academy MCAT Chemistry?
Hi guys, I'm a little confused here. I went to review titrations under the "Chemical and Physical Processes" section for the MCAT, and came across a sub-section that's called "acid-base titration...
View ArticleHow do buffers affect titration curves?
My thinking is that it will cause an increased amount of required titrant before the equivalence point is reached.
View ArticleQuick question - trans fats and membrane fluidity?
I'm confused on this simple question: Do trans fats increase or decrease membrane fluidity? The Kaplan Biochem. book seems to have a contradicting answer, so I wasn't sure
View ArticleEK Physics # 661
Sound emanating from source travels in all directions. This sound is measured at 20dB by an observer standing 40m away. In order to decrease the intensity level to 10dB, approximately how far from the...
View ArticleHydrogen acidity.
Is the alpha hydrogen of a Aldehyde less or more acidic than the hydrogen of a carbon bound to flourine? i.e. Does resonance stabilization outweigh the increased withdrawing capacity?
View ArticleHow to tell when a carbocation or carbanion forms?
For example, in B-dicarboxylic acid, the loss of the alpha hydrogen causes a formation of carbanion. Where as, tertiary carbons form carbocations. Here is my guess: The carbocation or anion formation...
View ArticleNet ATP from Glycolysis & TCA .... Biochemistry Accounting
For those who have taken Biochem (or Biology) before, here are the numbers for net ATP production for a molecule of d-glucose, from start to finish: Glucose --> 2 Pyruvate = 2 ATP + 2 NADH 2...
View ArticlePressure in a closed system
Lets say we have a bioreactor (closed system) with cells floating in it. If we are to introduce a stir rod, which would increase the velocity of the cells within the system, would the pressure of the...
View ArticlePhysics Problem Work/Energy
A force of 250 N is used to push a 30kg wagon uphill a distance of 12m, bringing it to a point 6 meters higher than its starting point. If 10% of work done is used in overcoming friction, a)Find the...
View ArticleLocation of hydrophobic and hydrophilic AA side chains
I'm a little confused on the location of hydrophobic and hydrophilic amino acids in different protein structures and was hoping someone could clear this up for me: In the secondary structure:...
View ArticleSection Bank P/S #35
Does anyone have definitions of what each of these concepts mean? The answer choice only seems to explain the "Life course approach to health," and I wasn't really able to find much on the others aside...
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