AAMC1: CPF Flashcards
what functional group is formed during peptide bond formation
amide group
Function of an enzyme
the stabilization of the transition state, not the substrate, provides binding energy that is used to lower the activation energy
gas liquid chromatography
In gas liquid chromatography, substances are boiled into a gas phase in order to exit the column.
Thus, the substance with the lowest boiling point will exit the column first and show up as a peak first.
imf and boiling point relationship
Strongest IMF’s will have the highest BP
In order of strongest to weakest:
ionic bond»_space;> hydrogen bond»_space; dipole > van der waals
current / resistance / voltage equation
V = IR
index of refraction
n
Index of refraction of a medium is equal to the ratio of the speed of light in vacuum to the speed of light in the medium.
energy of electromagnetic radiation is proportional to ____
intensity of radiation = ?
what’s the relationship btwn the two
The energy of electromagnetic radiation is directly proportional to the number of photons, and the intensity of electromagnetic radiation is defined as energy emitted per unit time. Thus, intensity is directly proportional to the number of photons emitted.
E of a photon
Energy of a photon = frequency times h (given on the MCAT)
Recall that tetra refers to 1012
pH / AA / aggregation
electrostatic principles, including interactions of amino acid side chains based on their charges at different pHs, can inhibit aggregation
why does velocity drop in the capillaries?
The high number of capillaries in the body means that the total cross-sectional area of these vessels is larger than any other vessel type in the circulatory system. This causes the velocity of the blood to decrease.
properties of an ideal gas (4)
Random molecular motion.
No intermolecular forces.
No (negligible) molecular volume.
Perfectly elastic collisions (conservation of total kinetic energy).
opsins
functional unit of the eye that absorb wavelengths of light; different but structurally related opsins allow the detection of different colors
opsins in RODS will focus on white, black, and “shadowing” differentiations – while CONES focus on the actual color spectrum (ROYGBIV)
beta decay
- negative v positive
negative: changes neutron into proton, thus increasing the atomic number to a new element but also emitting an electron for charge balance
positive: changes proton into neutron, thus decreasing teh atomic number to a new element but also emitting a proton for charge balance
acids w multiple H’s: how do their solubilities differ?
Acids that have the potential to donate multiple protons get weaker and weaker (and thus dissolve less and less due to increasingly lower solubility rates) as they donate more of their protons.
Eg. H3PO4 is considered a weak acid but it is still stronger / more soluble than HPO42- (which has already given away two of its original three protons)
unit of power
watt, defined as J/s = ft•lb/s = kg•m2/s3
