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Principles of Biochemistry Exam 1 (Dr. Bergen)
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Principles of Biochemistry Exam 1 (Dr. Bergen)
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Principles of Biochemistry Exam 1 (Dr. Bergen ) What nnnis nnna nnnpolar nnnbond? nnn- nnnANSWER: nnn✔ nnna nnncovalent nnnbond nnnin nnnwhich nnnelectrons nnnare nnnshared nnnunequally Are nnnall nnnmolecules nnnthat nnncontain nnnpolar nnnbonds nnnpolar nnnthemselves? nnn- nnnANSWER: nnn✔ nnnNo. nnnThe nnnstructure nnnof nnnthe nnnmolecule nnndetermines nnnits nnnpolarity. nnnExamples nnnare nnncarbon nnndioxide nnnvs nnnwater nnnstructure What nnnare nnnVan nnnder nnnWaals nnnforces? nnn- nnnANSWER: nnn✔ nnna nnnslight nnnattraction nnnthat nnndevelops nnnbetween nnnthe nnnoppositely nnncharged nnnregions nnnof nnnnearby nnnmolecules What nnndoes nnnamphipathic nnnmean? nnn- nnnANSWER: nnn✔ nnnhaving nnnboth nnnhydrophilic nnnand nnnhydrophobic nnnregions In nnna nnnhydrogen nnnbond, nnnwhat nnnis nnnthe nnnhydrogen nnnbond nnnacceptor nnnand nnnwhat nnnis nnnthe nnndonor? nnn- nnnANSWER: nnn✔ nnnThe nnndonor nnnis nnnthe nnnpositively nnncharged nnnhydrogen nnnatom nnnwhile nnnthe nnnacceptor nnnis nnnthe nnnnegatively nnncharged nnnatom nnn(N, nnnO, nnnor nnnF) nnnthat nnnit nnnis nnnattracted nnnto What nnnis nnnthe nnnstrongest nnnnon-covalent nnnbond? nnn- nnnANSWER: nnn✔ nnnHydrogen nnnbond Why nnnis nnnhydrogen nnnbonding nnnso nnnimportant nnnin nnnbiological nnnfunctions? nnn- nnnANSWER: nnn✔ nnnHydrogen nnnbonds nnnstabilize nnnthe nnn3-D nnnstructures nnnof nnnmolecules nnnsuch nnnas nnnDNA, nnnRNA, nnnand nnnproteins How nnnare nnnKa nnnvalues nnnrelated nnnto nnnacid nnnstrength? nnn- nnnANSWER: nnn✔ nnnThe nnnlarger nnnthe nnnKa nnnvalue, nnnthe nnnstronger nnnthe nnnacid Using nnnthe nnnHenderson nnnHasselbach nnnequation, nnnwhy nnndoes nnnpH nnn= nnnpKa nnnat nnnequal nnnconcentrations nnnof nnnacid nnnand nnnbase? nnn- nnnANSWER: nnn✔ nnnBecause nnnlog(1) nnn= nnn0 What nnnis nnna nnntitration? nnn- nnnANSWER: nnn✔ nnnthe nnnprocess nnnof nnnadding nnna nnnmeasured nnnamount nnnof nnnbase nnnto nnnan nnnacidic nnnsolution What nnnis nnnthe nnnequivalence nnnpoint nnnin nnntitrations? nnn- nnnANSWER: nnn✔ nnnThe nnnpoint nnnwhere nnnenough nnnbase nnnhas nnnbeen nnnadded nnnto nnnneutralize nnnthe nnnacid What nnnare nnncommon nnnbuffers nnnin nnnthe nnnhuman nnnbody? nnn- nnnANSWER: nnn✔ nnnNaH2PO4 nnnand nnnNa2HPO4 How nnndo nnnbuffers nnnwork? nnn- nnnANSWER: nnn✔ nnnThey nnnresist nnnchanges nnnin nnnpH nnnwhen nnnsmall nnnto nnnmoderate nnnamounts nnnof nnna nnnstrong nnnacid nnnor nnnstrong nnnbase nnnare nnnadded nnnto nnna nnnsolution What nnnis nnnbuffer nnncapacity? nnn- nnnANSWER: nnn✔ nnnthe nnnamount nnnof nnnacid nnnor nnnbase nnnthat nnncan nnnbe nnnadded nnnto nnna nnnbuffer nnnsolution nnnbefore nnna nnnsignificant nnnchange nnnin nnnpH nnnoccurs nnn -- nnnthe nnngreater nnnthe nnnconcentration nnnof nnnacid nnnor nnnbase, nnnthe nnngreater nnnthe nnnbuffer nnncapacity What nnnis nnna nnnzwitterion? nnn- nnnANSWER: nnn✔ nnnA nnnmolecule nnnwith nnnno nnnnet nnncharge nnn- nnnpositive nnnand nnnnegative nnncharges nnnbalance nnneach nnnother What nnnare nnnthe nnnfour nnnparts nnnof nnnan nnnamino nnnacid? nnn- nnnANSWER: nnn✔ nnnAn nnnamino nnngroup nnn(NH2), nnna nnncarboxyl nnngroup nnn(COOH), nnna nnnHydrogen nnn(H) nnnand nnnan nnn'R' nnngroup nnn(side nnnchain) What nnnportion nnnof nnnan nnnamino nnnacid nnndetermines nnnits nnnfunction/identity? nnn- nnnANSWER: nnn✔ nnnSide nnngroup What nnnare nnnthe nnntwo nnnstereoisomers nnnof nnnamino nnnacids nnnand nnnwhich nnnone nnnoccurs nnnthe nnnmost? nnn- nnnANSWER: nnn✔ nnnL- nnnand nnnD- nnnconformations nnn(L nnn= nnnamino nnngroup nnnto nnnthe nnnLeft, nnnD nnn= nnnamino nnngroup nnnto nnnthe nnnright). nnnL nnnoccurs nnnthe nnnmost List nnnthe nnnnon-polar nnnamino nnnacids nnn- nnnANSWER: nnn✔ nnnAlanineThe benefits of buying summaries with Stuvia:
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