BCH 351 Exam 1-Questions With 100% Verified
Answers.
detergents - ✔✔the tail can penetrate into protein interior and disrupt the hydrophobic
effects among nonpolar amino acids
chaotropic agents - ✔✔disrupts the structure and denatures the DNA by increasing
the entropy and non-covalent forces like hydrogen bonds
can form polar covalent bonds and therefore disrupt
hbond disruption
hydrophobic disruption
hydrocarbons are - ✔✔nonpolar, hydrophobic
amino group - ✔✔NH2
hydroxyl group - ✔✔OH-
Sulfhydrl group - ✔✔-SH
phosphoryl group - ✔✔PO3^2-
, carboxyl group - ✔✔cooh
methyl group - ✔✔ch3
covalent bond - ✔✔formed by atoms sharing their valence shell electron to completely
fill each atoms outer most shell
nonpolar covalent bond - ✔✔equal sharing of electrons; less than 0.5
polar covalent bond - ✔✔unequal sharing of electrons; greater than 0.5
ionic interactons (noncovalent) - ✔✔charge-charge interactions - salt bridges, have a
full positive or - charge; NaCl. Occur between opposite charged atoms or groups. EN group
difference greater than 2
h bonds (noncovalent) - ✔✔hydrogen is covalently bonded to an electronegative atom and
is in proximity to another electronegative atom. donors and acceptors
van der waals (noncovalent) - ✔✔between neutral molecules which cause temporary
dipole moments due to electron cloud fluctuations
ex: stacking of dna
maximum van der waals attraction - ✔✔slightly greater than the sum of the radii of the
2 atoms
hydrophobic effects - ✔✔tendency of nonpolar molecules pack close together away
from water
ex: protein folding
Answers.
detergents - ✔✔the tail can penetrate into protein interior and disrupt the hydrophobic
effects among nonpolar amino acids
chaotropic agents - ✔✔disrupts the structure and denatures the DNA by increasing
the entropy and non-covalent forces like hydrogen bonds
can form polar covalent bonds and therefore disrupt
hbond disruption
hydrophobic disruption
hydrocarbons are - ✔✔nonpolar, hydrophobic
amino group - ✔✔NH2
hydroxyl group - ✔✔OH-
Sulfhydrl group - ✔✔-SH
phosphoryl group - ✔✔PO3^2-
, carboxyl group - ✔✔cooh
methyl group - ✔✔ch3
covalent bond - ✔✔formed by atoms sharing their valence shell electron to completely
fill each atoms outer most shell
nonpolar covalent bond - ✔✔equal sharing of electrons; less than 0.5
polar covalent bond - ✔✔unequal sharing of electrons; greater than 0.5
ionic interactons (noncovalent) - ✔✔charge-charge interactions - salt bridges, have a
full positive or - charge; NaCl. Occur between opposite charged atoms or groups. EN group
difference greater than 2
h bonds (noncovalent) - ✔✔hydrogen is covalently bonded to an electronegative atom and
is in proximity to another electronegative atom. donors and acceptors
van der waals (noncovalent) - ✔✔between neutral molecules which cause temporary
dipole moments due to electron cloud fluctuations
ex: stacking of dna
maximum van der waals attraction - ✔✔slightly greater than the sum of the radii of the
2 atoms
hydrophobic effects - ✔✔tendency of nonpolar molecules pack close together away
from water
ex: protein folding
