Meiosis I in Spermatogenesis, recombination
Primary spermatocytes become secondary spermatocytes through meiosis I, but I'm confused about how recomination happens during this. How does recombination work if primary spermatocytes only have...
View ArticleRNA and the genetic code
This question is from Kaplan materials concept check 7.1 in biochem. Question #2 states the three base sequences listed below are DNA sequences. Which amino acid is encoded by each of these sequences,...
View ArticleSDS Page question
Hey guys, quick question about SDS page and reducing conditions (these questions seem to pop up a lot on both B/B and C/P), just trying to make sure I understand these concepts. So, let's consider a...
View ArticleQuestion about Mendel Genetics
I am super confused about mendel's law. Please help: 1) the punnet square that predicts colors and shapes of the beans, are these happening during during meiosis ii? 2) All these color/shape alleles...
View ArticleHot Air Balloon & Momentum
From TBR Physics II Pg 95: As a hot air balloon ascends upward at constant speed a package is dropped out of the balloon. At the instant the package is released, the momentum of the balloon: a....
View ArticleTwo lens system question
Quick and possibly stupid question: when you have two lenses, does the second lens act as the "observer" for the first lens's image, and then you are the "observer" for the second lens's image? I ask...
View ArticleDifference between stereotype and halo effect
I was wondering what is the difference between stereotypes and halo effect?
View ArticleElectric Potential Energy
View attachment 199321 Would it be D because you would add the electric potentials up?
View ArticleMCAT CARS - where would you expect to find this passage?
I'm studying for the MCAT, and I'm trying to find a pattern in the CARS section for the inference question, "In which of the following would one most reasonably expect to find this passage?" Based on...
View ArticleEqulibrium constant
View attachment 199297 Keq = [P]/[R] Why are they using the amounts of reactants left over in the equation?
View ArticleOrtho/Para Director?
View attachment 199388 Why is A not the answer? CH3 is an ortho/para director so shouldn't it be that the nitro group will end up in the 2 ortho and 1 para position, giving a total of 3 possible...
View ArticleTransition State Theory
Can someone explain the Transition State Theory? I have looked through the wikipedia page but I am still confused. I understand what transition states are how the reaction progresses through the the...
View ArticleMuscle contraction
What happens to the M line during contraction? Is it just the midpoint of the sarcomere?
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 ArticleType of Reaction for Peptide Bond Formation
Hey guys, What is the reaction that makes peptide bond called? I know that it is dehydration reaction, but EK Chemistry calls it a "typical nucleophilic substitution reaction." How so? EK calls the...
View ArticleBoiling Point of fatty acids
Hey guys, How is the boiling point of saturated and cis- trans-unsaturated fatty acids related? I know that cis-unsaturated fatty acids have greater boiling point due to dipole-dipole interaction, but...
View ArticleAAMC Archimede's Principle problem (MCAT 2015 Sample test)
Can someone please explain the Archimedes problem on the AAMC sample test? The one asking about the density of a human body calculated by the weight in air and its weight submerged in water? Answer...
View ArticleMoving object on a string
If we have a mass on a string and swing it - I am confused about at what points there would be the maximum tension , maximum velocity etc. In one of the practice problems, they stated that max tension...
View ArticleCovalent enzyme modifications
I know that there are different ways in which an enzyme can be covalently modified (methylation. phosphorylations etc). How do we know which type of modification will target which type of amino acid...
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