Biochem Module 2 - Exam Questions Fully Solved Latest Update 2025 Already Passed

Biochem Module 2 - Exam Questions Fully Solved Latest Update 2025 Already Passed how many electric dipoles does water have? - Answers 2 covalent =... - Answers strong non-covalent=... - Answers weak Non-covalent interactions - Answers Driving force of molecular interactions that occur within our cells H Donor is straight line or dotted line? - Answers straight H acceptor is straight line or dotted line? - Answers dotted examples of H acceptor? - Answers O, N what caueses H-bonds to be 10% covalent? - Answers due to overlaps in the bonding orbitals lifetime of each H-bond in water is ... - Answers short lived what account for the high melting point of water? - Answers when there is a high # of H-bonds hydrophilic - Answers any compound that readily dissolves in water hydrophobic - Answers non-polar compounds that don't dissolve (mix) well in water Amphipathic - Answers have both hydrophilic and hydrophobic parts is water non-polar? - Answers no, water is polar examples of polar biomolecules - Answers - glucose - glycine - aspartate - lactate - glycerol examples of non-polar biomolecules - Answers - typial wax examples of amphipathic biomolecules - Answers - phenylalanine - phosphatidylcholine what does Coulomb's Lawin a Vacuum describe? - Answers Describes the electrostatic interaction b//w electrically charged particles in a vacuum vacuum? - Answers is a space void of matter q1 and q2 = - Answers a pair of charged objects r = - Answers distance separating the objects coulomb's law - Answers F= k q₁*q₂/r² (coulomb's law) positive force = - Answers repulsive (coulomb's law) negative force = - Answers attractive what law is an inverse square law? - Answers coulomb's law basics of coulomb's law - Answers The larger the distance, the smaller the force Relative permittivity (aka. Dielectric constant epsilon): - Answers the factor by which the electric field b/w the charges is decreased relative to a vacuum permittivity - Answers a material property that expresses the force b/w 2 point charges in the material epsilon value in a vacuum? - Answers 1 epsilon value of water - Answers 8 epsilon value of organic liquids - Answers 1-10 epsilon is inverely proportional to ... - Answers force T/F: Higher the dielectric force, the lower/weaker the force b/w the 2 charges - Answers True (E) = function of energy of interaction - Answers The energy required to separate 2 charged particles from a distance (r) to an infinite distance as r --> infinity, E-->? - Answers 0, therefore no attraction do benzene and hexane dissolve in water? - Answers no what does adding hydro[hobic compounds to water constrain? - Answers Adding hydrophobic compounds to water constrains the orientation of water molecules in the immediate vicinity, decreases entropy amphipathic compound in water - Answers - Hydrophilic region dissolves, polar regions arrange so they maximize their interaction with the water solvent - Hydrophobic region avoids contact with water, clusters together in an attempt to occupy the smallest hydrophobic possible in the water solution how to get maximum thermodynamic stability for amphipathic molecules? - Answers Greatest thermodynamic stability by minimizing # of ordered water molecules required to surround hydrophobic portions dipole - Answers unequal sharing of electrons polarizable - Answers take certain molecules that do not normally have permanent dipole moments and induce a dipole moment by exposing them to an electric field example of molecule that induced dipole interaction - Answers aromatic rings (benzene) who have nicely stabilized conjugated electron systems what happens when 2 polarizabl molecules very close? - Answers - Their charge fluctuations tend to localize an area of partial positive charge on one molecule next to an area of partial negative charge on the neighboring molecule producing a net attractive force - Individual interaction weak, but collectively play huge role Charge-Charge interaction distance? - Answers 1/r charge-dipole interaction distance? - Answers 1/r^2 dipole-dipole interaction distance? - Answers 1/r^3 charge-induced dipole interaction distance? - Answers 1/r^4 dipole-induced dipole interaction distance? - Answers 1/r^5 van der Waals interaction distance? - Answers 1/r^6 what happens when 2 uncharged atoms very close? - Answers - May create a transient electric dipole, which induces a transient, opposite electric dipole in the nearby atom - Net result: the dipoles attract each other weakly, bringing the 2 nuclei together -->aka. Van der Waals Interactions van der Waals Radius - Answers a measure of how close that atom will allow another to approach