AAMC practice test scored 100%

AAMC practice test scored 100% in chromatography of the reaction mixture, water is absorbed on cellulose functioned as the stationary phase - what is the principal factor determine the migration of individual components in the sample? -Answer-HYDROGEN BONDING (determines rate of migration) dehydration reaction (tertiary OH to double bond) occurs most readily with what OH? reaction involves loss of WATER molecule and the reaction has a CARBOCATION intermediate -Answer-tertiary alcohols amide group (functional group that forms during peptide bond formation between 2 amino acids) -Answer- rate of substitution of protonated alcohols is subject to STERIC HINDRANCE -Answer-(inhibits ability of nucleophiles to collide with reacting electrophilic center and slows rate of reaction) In gas chromatography - what characteristics result in gas moving fastest, therefore making first peak in gas chromatograph trace -Answer-- lowest molecular weight - weakest intermolecular forces of attraction strength of eye lens = inverse of focal length of eye lens -Answer-i.e. (1/o) + (1/i) = 1/f f = daltons index of refraction of a medium is equal to the -Answer-ratio of the speed of light in a vacuum/speed of light in the medium intensity of electromagnetic radiation = energy emitted per unit time -Answer- 1 Thz = ---- hz 1Mhz = 1 x 10^6 hz -Answer-1 x 10^12 watts * seconds = -Answer-KJ ------ forces are forces of attraction or repulsion which act between neighboring particles - Answer-intermolecular forces ---- forces in chemistry describes a process or characteristic limited within the structure of a single molecule, a property or phenomenon limited to the extent of a single molecule -Answer- intramolecular octahedral copounds have 6 sigma bonds and no lone pairs - requires the hybridization of six atomic orbitals (what type of orbitals are involved in boding in octahedral compounds?) -Answer-d^2 sp^3 assumptions of IDEAL GAS LAW *LOOK up other assumptions -Answer-individual molecular volume and intermolecular forces are neglible enzyme that hydrolyzes fatty acids -Answer-lipase RNA: ribose -Answer- uridine (is a ribose) -Answer- radioactive beta (-) decay -Answer-neutron is converted to proton ratio of image heigh to object height is equal to the ratio of lens-imaging distance to object-lens distance -Answer-use equation (1/object + 1/image = 1/f) gamma decay occurs when a nucleus emits a -Answer-photon REVIEW GALVANIC CELLS/ ELECTRICAL POTENTIAL -Answer- a SPONTANEOUS reaction occurs when Eo is --- than zero -Answer-greater than zero +delta E measurements used to express POWER -Answer-J/s kg*m^2/s^3 (ft*lb)/s W mutation is NOT inherited when mutated transcripts are not present in noncancerous tissue of people (i.e. no mutant transcript in germ cell so DOES not pass on) -Answer- sites that influence splicing -Answer-splice acceptor site aromatic ring amino acids -Answer-pheylalanine, tryptophan mature mRNAs = have SIGNAL SEQUENCE (i.e. if transmembrane protein, signal sequenc directs it to ER) -Answer- Nicotinamide nucleotides -Answer-NAD+ total number of fused rings present in a steroid -Answer-4 free energy is a thermodynamic quantity (NOT a kinetic property) - activity is a kinetic property (so can NOT measure the activity of Na+ K+ ATPase) -Answer- what does Na+ / K+ ATPase do? -Answer-NA+ transported OUT Of cell, K+ transported INTO cell ------ ------ bund DNA and recruit RNA polyerase -Answer-transcription factors cholesterol rich domain = "------ -------" -Answer-lipid rafts protein levels relate most directly to levels of what? -Answer-mRNA level