Chemical And Physical Foundations Of Biological Sy
Chemical and Physical Foundations of Biological Sy
Exam (elaborations)
Chemical and Physical Foundations of Biological Systems MCAT Quizlet || All Correct.
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Chemical and Physical Foundations of Biological Sy
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Chemical And Physical Foundations Of Biological Sy
Magnetic fields exert forces on moving __________ particles correct answers Charged
Does a photon have a positive, negative, or no charge? correct answers No charge
In a chiral center, what happens if the lowest priority group is in the front of the molecule? back? correct answers Front = rev...
Chemical and Physical Foundations of Biological Systems
MCAT Quizlet || All Correct.
Magnetic fields exert forces on moving __________ particles correct answers Charged
Does a photon have a positive, negative, or no charge? correct answers No charge
In a chiral center, what happens if the lowest priority group is in the front of the molecule? back?
correct answers Front = reverse order direction
Back = normal
Which direction is R chiral center? S? correct answers R = clockwise
S = counterclockwise
What is electron affinity? correct answers The amount of energy released when a electron
attaches to a neutral atom in the gaseous state to form an anion.
When a substance loses an electron, it's called? gains? correct answers Loses = oxidation
Gains = reduction
Electron affinity increases as more __________ are added to each orbital, this would mean
oxidation __________ electron affinity. correct answers Electrons, reduces
The addition of a nitric acid to a molecule would be considered
A) oxidation
B) dehydration
C) nucleophilic addition correct answers A
Triglyceride Is a type of __________ compound correct answers Lipid
Triglycerides are made up of glycerol plus three __________ groups correct answers Fatty acid
Amides are functional groups commonly found in? correct answers Proteins
True or false, ethers are not important functional groups in any biologically important molecule.
correct answers True
Hemiacetals are present in mainly __________ correct answers Sugars
Does deprotonation occur at high or low PH? How about protonation? correct answers
Deprotonation = High PH
Protonation = Low PH
What is the formula for degrees of unsaturation? correct answers [2C + 2 + N - H - X(halogen)] /
2
, An easy way to find the degrees of unsaturation when the formula would take too long is to?
correct answers Count only the changes in the two molecules being compared
Shorter wavelengths would equate to photons of __________ energies. correct answers Larger
True or false, the excited state of a molecule has a greater charge than the ground state. correct
answers False, they have the same charge but different energy
Is it possible for an absorbed photon to lose energy before it is emitted again? If so, Why?
correct answers Yes, the lost energy is converted into heat.
What is hydrolysis? correct answers The chemical breakdown of a compound which is cleaved
using water
What is electrophilicity? correct answers The measure of the ability of a molecule to take up
electrons
What is electronegativity? correct answers Similar to electrophilicity, it describes the tendency of
an atom to attract electrons to itself.
what is electron affinity? correct answers The energy change that results from adding an electron
to a gaseous atom making an anion
A negatively charged molecule would be more or less electrophilic? Why? correct answers Less,
because a negative charge means there is less space to take up electrons in the atom's orbitals.
Electrophiles __________ electrons and are usually __________ charged correct answers
Accept, positively
Nucleophiles __________ electrons and are usually __________ charged correct answers
Donate, negatively
Is water, nucleophile or electrophile? correct answers Nucleophile
True or false, Electrophilcity is directly proportional to the rate of hydrolysis. Why? correct
answers True, because water is a nucleophile so it becomes easier to donate electrons to a more
electrophilic molecule that is starved of electrons, therefore increasing the rate of hydrolysis with
more electrophilic molecules.
What is the nucleophilicity trend on the period table? correct answers Down left
What is the basicity trend on the periodic table? correct answers Up left
What is the electronegativity trend on the periodic table? correct answers Up right
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