UIUC MCB 450 Exam questions with
complete solutions 2024
Biomolecules jcan jbe jdivided jinto jfour jdifferent jclasses. jWhich jof jthe jfollowing
jis jNOT ja jmajor jclass jof jbiomolecule? j- jANS✓✓-Fatty jAcids
Which jof jthe jfollowing jmolecules jare jthe jmajor jcomponents jof jthe jcollagen? j-
jANS✓✓-proteins
Water jis jsaid jto jbe jhighly jcohesive jbecause jwater jmolecules jinteract jwith jone
janother jthrough: j- jANS✓✓-hydrogen jbonds
Which jof jthe jfollowing jis jconsidered ja jnoncovalent jbond? j- jANS✓✓--
electrostatic jinteractions
-hydrogen jbonds j
-Van jder jWaals jinteractions j
-ALL jOF jTHE jABOVE
What jis jthe j[A-]/[HA] jratio jwhen jthe jweak jacid jis jin ja jsolution jtwo jpH junits
jabove jits jpKa? j- jANS✓✓-100:1
Brownian jmotion jis jdue jto: j- jANS✓✓-The jrandom jfluctuation jof jthe jenergy
jcontent jof jthe jenvironment jand jthermal jnoise
Consider ja jbiochemical jreaction jthat jis jtaking jplace jin ja j0.1 jM jbuffer. jThe
jinitial jpH jis j7.4, jand jthe jpKa jof jthe jbuffer jis j7.2. jIf, jin ja jfinal jreaction jvolume jof
j1.0 jmL, j10 jmicromol jof jprotons jare jgenerated, jwhat jwould jbe jthe jfinal jpH jof
jthe jsolution? j- jANS✓✓-7.22
, Solution jX jis jat ja jpH jof j3; jsolution jY jis jat ja jpH jof j8. jWhich jof jthe jfollowing
jstatements jis jTRUE? j- jANS✓✓-solution jX jcontains jmore jprotons jthan jsolution
jY
What jare jthe jprimary jchemical jcomponents jpresent jin ja jphosphate jbuffer jat jpH
j7.4? j- jANS✓✓-H₂PO₄⁻ jand jHPO₄ j⁻²
Which jof jthe jfollowing jcharacterize jα-helix jregions jof jproteins? j- jANS✓✓-They
jare jformed jprincipally jby jhydrogen jbonds jbetween ja jcarbonyl joxygen jatom jin
jone jpeptide jbond jand jthe jamide jhydrogen jfrom ja jdifferent jpeptide jbond.
Autopsies jof jpatients jwith jAlzheimer jdisease jshow jprotein jaggregates jcalled
jneurofibrillary jtangles jand jneuritic jplaques jin jvarious jregions jof jthe jbrain.
jThese jplaques jexhibit jthe jcharacteristic jstaining jof jamyloid. jWhich jof jthe
jfollowing jstructural jfeatures jis jthe jmost jlikely jcharacteristic jof jat jleast jone
jprotein jin jthese jplaques? j- jANS✓✓-A jhigh jcontent jof jbeta jpleated jsheet
jstructure
Which jof jthe jfollowing jsecondary jstructures jis jmost jlikely jto jbe jfound jin ja
jmembrane-embedded jportion jof ja jprotein? j- jANS✓✓-an jalpha jhelix jcomposed
jentirely jof jhydrophobic jresidues
Which jof jthe jfollowing jstatements jregarding jpeptide jbonds jis jleast jaccurate? j-
jANS✓✓-favored jconformation jof jpeptide jbonds jis jwith jthe jsequential jalpha
jcarbons jin jthe jcis jposition
Which jis jan jappropriate jstatement jof jinvolvement jof jthe jhydrophobic jeffect jin
jprotein jfolding? j- jANS✓✓-Nonpolar jportions jof jthe jmolecule jassociate jwith
jone janother jin jthe jinterior jof jthe jprotein.
All jof jthe jfollowing jwould jdisrupt jquaternary jstructure jexcept: j- jANS✓✓-Treat
jwith jascorbic jacid j(vitamin jC).
The jprocess jof jdigestion jin jthe jstomach jis jcarried jout jin jtwo jmain jways. jOne
jway jinvolves jthe j_____environment jthat jexists jin jthe jstomach. j- jANS✓✓-low
jpH
complete solutions 2024
Biomolecules jcan jbe jdivided jinto jfour jdifferent jclasses. jWhich jof jthe jfollowing
jis jNOT ja jmajor jclass jof jbiomolecule? j- jANS✓✓-Fatty jAcids
Which jof jthe jfollowing jmolecules jare jthe jmajor jcomponents jof jthe jcollagen? j-
jANS✓✓-proteins
Water jis jsaid jto jbe jhighly jcohesive jbecause jwater jmolecules jinteract jwith jone
janother jthrough: j- jANS✓✓-hydrogen jbonds
Which jof jthe jfollowing jis jconsidered ja jnoncovalent jbond? j- jANS✓✓--
electrostatic jinteractions
-hydrogen jbonds j
-Van jder jWaals jinteractions j
-ALL jOF jTHE jABOVE
What jis jthe j[A-]/[HA] jratio jwhen jthe jweak jacid jis jin ja jsolution jtwo jpH junits
jabove jits jpKa? j- jANS✓✓-100:1
Brownian jmotion jis jdue jto: j- jANS✓✓-The jrandom jfluctuation jof jthe jenergy
jcontent jof jthe jenvironment jand jthermal jnoise
Consider ja jbiochemical jreaction jthat jis jtaking jplace jin ja j0.1 jM jbuffer. jThe
jinitial jpH jis j7.4, jand jthe jpKa jof jthe jbuffer jis j7.2. jIf, jin ja jfinal jreaction jvolume jof
j1.0 jmL, j10 jmicromol jof jprotons jare jgenerated, jwhat jwould jbe jthe jfinal jpH jof
jthe jsolution? j- jANS✓✓-7.22
, Solution jX jis jat ja jpH jof j3; jsolution jY jis jat ja jpH jof j8. jWhich jof jthe jfollowing
jstatements jis jTRUE? j- jANS✓✓-solution jX jcontains jmore jprotons jthan jsolution
jY
What jare jthe jprimary jchemical jcomponents jpresent jin ja jphosphate jbuffer jat jpH
j7.4? j- jANS✓✓-H₂PO₄⁻ jand jHPO₄ j⁻²
Which jof jthe jfollowing jcharacterize jα-helix jregions jof jproteins? j- jANS✓✓-They
jare jformed jprincipally jby jhydrogen jbonds jbetween ja jcarbonyl joxygen jatom jin
jone jpeptide jbond jand jthe jamide jhydrogen jfrom ja jdifferent jpeptide jbond.
Autopsies jof jpatients jwith jAlzheimer jdisease jshow jprotein jaggregates jcalled
jneurofibrillary jtangles jand jneuritic jplaques jin jvarious jregions jof jthe jbrain.
jThese jplaques jexhibit jthe jcharacteristic jstaining jof jamyloid. jWhich jof jthe
jfollowing jstructural jfeatures jis jthe jmost jlikely jcharacteristic jof jat jleast jone
jprotein jin jthese jplaques? j- jANS✓✓-A jhigh jcontent jof jbeta jpleated jsheet
jstructure
Which jof jthe jfollowing jsecondary jstructures jis jmost jlikely jto jbe jfound jin ja
jmembrane-embedded jportion jof ja jprotein? j- jANS✓✓-an jalpha jhelix jcomposed
jentirely jof jhydrophobic jresidues
Which jof jthe jfollowing jstatements jregarding jpeptide jbonds jis jleast jaccurate? j-
jANS✓✓-favored jconformation jof jpeptide jbonds jis jwith jthe jsequential jalpha
jcarbons jin jthe jcis jposition
Which jis jan jappropriate jstatement jof jinvolvement jof jthe jhydrophobic jeffect jin
jprotein jfolding? j- jANS✓✓-Nonpolar jportions jof jthe jmolecule jassociate jwith
jone janother jin jthe jinterior jof jthe jprotein.
All jof jthe jfollowing jwould jdisrupt jquaternary jstructure jexcept: j- jANS✓✓-Treat
jwith jascorbic jacid j(vitamin jC).
The jprocess jof jdigestion jin jthe jstomach jis jcarried jout jin jtwo jmain jways. jOne
jway jinvolves jthe j_____environment jthat jexists jin jthe jstomach. j- jANS✓✓-low
jpH
