Varsity Tutors MCAT practice resources
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View Articletransposon question
Which of the following is an accurate description regarding the activity of transposons? A) If a single transposon inserts into the promoter or regulatory region of a protein coding gene, protein...
View ArticleIntensity and amplitude of a wave - EK question
p135 in the physics book As the force with which the hammer strikes the string is increased, the amplitude of the string's motion is increased. Which of the following properties of the wave on the...
View ArticleSection Bank Pyschology 82
Here is the question: A patient being treated for chronic pain receives weekly doses of morphine from the same doctor, with whom the patient enjoys conversing. On another occasion, the patient is...
View ArticleNucleophilicity: Polarizability vs Charge Distribution
Hey! The TPR book I'm reading says that nucleophilicity increases as you move down within a group on the periodic table because it increases polarizability due to the negative charge being more prone...
View ArticleNodes of Ranvier
I am trying to understand why the myelin sheaths would make a difference in conduction - I know that the axon is long so since L is proportional to resistance then the electrical current will dissipate...
View ArticleBR lipids chapter
There is a reaction shown in BR organic that shows vitamin A (retinol) because oxidized to retinal using NADH (a reducing agent). Is this incorrect? How can a reducing agent (which gets oxidized) cause...
View ArticleQuestion about MHC II vs. MHC I
BR biology describes macrophages as cells which present an antigen via an MHC I protein so that cytotoxic T cells can recognize and kill the invading cells (nonspecific immune response). In one of the...
View ArticleIon Exchange Chromatography Question
A mix of Cytochrome C, Myoglobin, and Alkaline phosphatase are placed into a gel chromatography column filled with DEAE, a positively charged stationary phase. 2 different Tris buffers at pH of 8 are...
View ArticleAAMC Sample B/B #9
View attachment 215101 So I picked A, which I now understand is wrong because I guess B is a better answer. Is B correct because the mouse antibody (a protein) would be considered an antigen by the...
View ArticleAAMC Sample B/B #15
View attachment 215102 I don't understand the explanation, could someone possibly clarify this? I don't understand what they mean by "other equilibria". I chose D because I thought to carbonic...
View ArticleVmax and absolute activity
Hi! The following is a question from C/P (#55) from EK FL 1. You don't need any info from the passage to answer this question, so I'm just posting the question below: During one experiment, a fixed...
View ArticleSection Bank C/P 96 - Ternary Complex
The answer choice states that a ternary complex forms which is a protein complex with 3 different molecules bound together. Are the three molecules: ATP, Glycerol, and Glycerol Kinase? View attachment...
View ArticleBR Atomic Structure Passage III Q17
For Some Compounds which emits orange light for a transition from the n=4 level to the n=3 level, what must be necessarily True? A. a transition from the n=5 level to the n=4 level emits green light B....
View ArticlePulmonary surfactant and lung collapse
I had a question on pulmonary collapse and surfactants I know that surfactants reduce the surface tension of the alveoli fluid because by adding the surfactant the hydrophilic molecules are able to...
View ArticleNextStep Chemistry
The kinetics of the ninhydrin reaction were shown to be first order with respcct Io 1,2,3-indantrione and a-alpha amino acid, and second order overall. The reaction rate was shown to vary with solution...
View ArticleAntibodies
I have a couple of questions regarding antibodies, 1. What exactly is an anti antibody, and how does it work? 2. In addition, could someone explain the terms monovalent/divalent, unideterminant, etc.?...
View ArticleZygote chromosomes question (kaplan)
Question with answer A zygote destined to be female will have two X chromosomes. Which of the following statements is true regarding the genetic makeup of those two X-chromosomes, assuming that no...
View ArticleQuick Question about Membrane Potential
Hello all, Good evening! I have a quick question about membrane potential when I came across the following question: Q: For most cells, extracellular calcium concentration is around 10,000 times higher...
View ArticleVasoconstriction in response to drop in blood pressure
I have trouble understanding the compensatory mechanism of vasoconstriction in response to low blood pressure. Blood pressure is defined as the pressure of blood on the walls of blood vessels. What...
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