Hydrofluoric acid+ calcium= - Answers-calcium fluoride-- highly insoluble and therefore precipitates in the body and lower serum calcium in body
in splicing what is removed - Answers-introns are removed and exons are fused together to leave the nucleus after further modification
Diffraction i...
MCAT HIGH YIELD QUESTIONS AND
ANSWERS.
When does pKa=pH? - Answers-when there are an equal amount of Hs and OHs
How does volume in a thermometer expand? - Answers-it must have a larger volume
expansion coefficient to fluctuate with temperature
Two amino acids linking together make a ____ bond - Answers-peptide
Fischer esterification - Answers-forms an ester (COOR)
involves reacting an acid and alcohol with a COOH to form an ester
a protecting group does what? - Answers-reduces nucleophilicity of the group that it is
protecting
oxidizing agent - Answers-it oxidizes another species but becomes reduced itself in the
process
In an electrochemical cell oxidation occurs at the _____ and reduction occurs at the
_____. So electron flow is from ____ to_____. - Answers-anode, cathode
anode to cathode
Eocell is calculated how? - Answers-E reduction potential at cathode- E reduction
potential at anode
charge on an cathode? - Answers-the charge is negative because it attracts cations
charge on an anode? - Answers-the charge is positive because it attracts anions
What is the molecular weight of each peptide bond formed? - Answers-18
Amino acids form in which direction? - Answers-amino (N terminus) to carboxyl (C
terminus)
Equation for torque? - Answers-F*sin0*d (from the center fulcrum) or F*d (if the torque
is perpendicular)
Why might an electron configuration not fill like you might think it should? - Answers-it is
more stable filling the top one fulling and half filling the lower subshell (s)
Beta decay - Answers-an electron is released and a neutron is converted into a
proton...the mass number increases by one
How is direction of light that is rotated determined? Dextrorotary or levorotatory. Also (+)
and (-) - Answers-experimentally so if the direction of polarized light is in the answer
ignore it unless it was determined experimentally
Lactone formation - Answers-alcohol group and a carboxylic acid
What bonds are delocalized in conjugation? - Answers-pi bonds
Conjugation decreases/increases energy of the molecule - Answers-usually decreases
IR spectrometry- - Answers-OH peak- broad at 3300
C=O is a peak at 1750-1700
Calculating stereoisomers-- - Answers-2^n
n=stereocenters
volume of water affected by temperature - Answers-freezing- increases volume
heating- decreases volume
Specific heat equation - Answers-q=mc(delta)T
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