BS 161 FINAL EXAM with correct detailed
| | | | | | |
answers
In |a |single |molecule |of |water, |two |hydrogen |atoms |are |bonded |to |a |single |oxygen |atom |by |- |
correct |answerspolar |covalent |bonds
The |negative |logarithmic |of |the |hydrogen |ion |concentration |in |the |solution |is |referred |to |as |- |
correct |answerspH
When |are |atoms |most |stable? |- |correct |answerswhen |all |of |the |electron |orbitals |in |the |
valance |shell |are |filled
The |structural |formula |for |a |certain |molecule |includes |a |group |symbolized |-O. |The |dash |next |
to |the |oxygen |atom |means |that |a |single |bond |exists |to |another |atom, |such |as |a |carbon. |Based
|on |the |valence |of |oxygen |and |the |number |of |bonds |it |normally |forms, |what |is |the |charge |on |
the |oxygen |atom |in |this |case? |- |correct |answers
Two |carbon |atoms |joined |to |each |other |by |sharing |of |two |pairs |of |electrons |form |a(n): |- |
correct |answersionic |bond
Plants |transport |water |to |their |leaves |through |the |xylem |when |water |evaporates |from |the |
leaves. |The |evaporating |water |pulls |other |water |molecules |up |the |xylem |through |- |correct |
answers
Membrane |lipids |contain |long |chains |of |H-C-H |groups |joined |by |C-C |bonds. |Which |interaction |
is |most |likely |to |occurring |between |lipids |in |the |membrane? |- |correct |answersvan |der |waals
Consider |the |following |electronegativity |values: |Boron=1.8; |Carbon=2.5; |Chlorine=3.2; |
Selenium= |2.6. |Which |bond |is |the |most |polar? |- |correct |answersB-Cl
,Which |of |the |following |best |summarizes |the |relationship |between |dehydration |reactions |and |
hydrolysis? |- |correct |answersDehydration |reactions |assemble |polymers, |and |hydrolysis |
reactions |break |down |polymers.
Which |of |the |following |polymers |contain(s) |nitrogen? |- |correct |answersChitin
The |molecular |formula |for |glucose |is |C6H12O6. |What |would |be |the |molecular |formula |for |a |
molecule |made |by |linking |three |glucose |molecules |together |by |dehydration |reactions? |- |
correct |answersC18H32O16
It |became |apparent |to |Watson |and |Crick |after |completion |of |their |model |that |the |DNA |
molecule |could |carry |a |vast |amount |of |hereditary |information |in |which |of |the |following? |- |
correct |answersSequence |of |bases
What |is |meant |by |the |description |"antiparallel" |regarding |the |strands |that |make |up |DNA? |- |
correct |answersThe |5' |to |3' |direction |of |one |strand |runs |counter |to |the |5' |to |3' |direction |of |
the |other |strand
If |you |made |a |change |in |the |promoter |sequence |in |the |DNA |that |inactivates |the |promoter, |
what |would |happen |at |the |RNA |level? |- |correct |answersThe |RNA |polymerase |would |not |be |
able |to |recognize |and |bind |the |DNA, |so |no |RNA |would |be |made
The |genetic |code |is |essentially |the |same |for |all |organisms. |From |this, |one |can |logically |assume
|which |of |the |following? |- |correct |answersA |gene |from |an |organism |can |theoretically |be |
expressed |by |any |other |organism
Imagine |you |have |discovered |a |new |species |of |bacteria. |To |begin |your |investigation |of |this |
organism, |you |run |an |assay |on |the |total |nucleotide |content |of |the |bacterial |DNA. |If |the |
cytosine |content |of |DNA |from |the |bacterial |cells |is |40%, |what |is |the |adenine |content? |- |
correct |answers10%
Which |of |the |following |does |not |occur |in |prokaryotic |eukaryotic |gene |expression, |but |does |in |
eukaryotic |gene |expression? |- |correct |answersa |Poly-A |tail |is |added |to |the |3' |end |of |an |mRNA |
and |a |cap |is |added |to |the |5' |end
, The |Dystrophin |gene |is |2.3 |million |nucleotides |long, |however |it |only |uses |~12,00 |nucleotides |
to |make |a |protein |consisting |of |3,685 |amino |acids. |This |is |best |explained |by |the |fact |that |- |
correct |answers
Accuracy |in |the |translation |of |mRNA |into |the |primary |structure |of |a |polypeptide |depends |on |
specificity |in |the: |- |correct |answersBonding |of |the |anticodon |to |the |codon |and |the |attachment
|of |amino |acids |to |tRNAs
Streptomycin |is |an |antibiotic |that |interferes |with |the |function |of |the |large |subunit |of |the |
prokaryotic |ribosome. |What |is |the |consequence |of |treating |bacteria |with |streptomycin. |- |
correct |answersimpaired |protein |synthesis
DNA |template |strand |5'-------------3' |
DNA |complementary |strand |3'----------5'
Given |the |locally |unwound |double |strand |above, |in |which |direction |does |the |RNA |polymerase |
move? |- |correct |answers3' |--> |5' |along |the |template |strand
In |the |transcription |event |of |the |previous |DNA, |where |would |the |promoter |be |located? |- |
correct |answersTo |the |right |of |the |template |strand
What |enzyme |catalyzes |the |attachment |of |an |amino |acid |to |tRNA? |- |correct |
answersaminoacyl-tRNA |synthetase
Osmosis |occurs |as |water |can |cross |the |lipid |bilayer |through |specialized |channels |for |water |
movement |called |________. |- |correct |answersaquaporins
Long |saturated |fatty |acid |tails |_______ |lipid |mobility |and |_________ |membrane |fluidity. |- |
correct |answersreduce, |decrease
Which |of |the |following |would |likely |move |through |the |phosolipic |bilayer |of |a |membrane |most |
rapidly? |
| | | | | | |
answers
In |a |single |molecule |of |water, |two |hydrogen |atoms |are |bonded |to |a |single |oxygen |atom |by |- |
correct |answerspolar |covalent |bonds
The |negative |logarithmic |of |the |hydrogen |ion |concentration |in |the |solution |is |referred |to |as |- |
correct |answerspH
When |are |atoms |most |stable? |- |correct |answerswhen |all |of |the |electron |orbitals |in |the |
valance |shell |are |filled
The |structural |formula |for |a |certain |molecule |includes |a |group |symbolized |-O. |The |dash |next |
to |the |oxygen |atom |means |that |a |single |bond |exists |to |another |atom, |such |as |a |carbon. |Based
|on |the |valence |of |oxygen |and |the |number |of |bonds |it |normally |forms, |what |is |the |charge |on |
the |oxygen |atom |in |this |case? |- |correct |answers
Two |carbon |atoms |joined |to |each |other |by |sharing |of |two |pairs |of |electrons |form |a(n): |- |
correct |answersionic |bond
Plants |transport |water |to |their |leaves |through |the |xylem |when |water |evaporates |from |the |
leaves. |The |evaporating |water |pulls |other |water |molecules |up |the |xylem |through |- |correct |
answers
Membrane |lipids |contain |long |chains |of |H-C-H |groups |joined |by |C-C |bonds. |Which |interaction |
is |most |likely |to |occurring |between |lipids |in |the |membrane? |- |correct |answersvan |der |waals
Consider |the |following |electronegativity |values: |Boron=1.8; |Carbon=2.5; |Chlorine=3.2; |
Selenium= |2.6. |Which |bond |is |the |most |polar? |- |correct |answersB-Cl
,Which |of |the |following |best |summarizes |the |relationship |between |dehydration |reactions |and |
hydrolysis? |- |correct |answersDehydration |reactions |assemble |polymers, |and |hydrolysis |
reactions |break |down |polymers.
Which |of |the |following |polymers |contain(s) |nitrogen? |- |correct |answersChitin
The |molecular |formula |for |glucose |is |C6H12O6. |What |would |be |the |molecular |formula |for |a |
molecule |made |by |linking |three |glucose |molecules |together |by |dehydration |reactions? |- |
correct |answersC18H32O16
It |became |apparent |to |Watson |and |Crick |after |completion |of |their |model |that |the |DNA |
molecule |could |carry |a |vast |amount |of |hereditary |information |in |which |of |the |following? |- |
correct |answersSequence |of |bases
What |is |meant |by |the |description |"antiparallel" |regarding |the |strands |that |make |up |DNA? |- |
correct |answersThe |5' |to |3' |direction |of |one |strand |runs |counter |to |the |5' |to |3' |direction |of |
the |other |strand
If |you |made |a |change |in |the |promoter |sequence |in |the |DNA |that |inactivates |the |promoter, |
what |would |happen |at |the |RNA |level? |- |correct |answersThe |RNA |polymerase |would |not |be |
able |to |recognize |and |bind |the |DNA, |so |no |RNA |would |be |made
The |genetic |code |is |essentially |the |same |for |all |organisms. |From |this, |one |can |logically |assume
|which |of |the |following? |- |correct |answersA |gene |from |an |organism |can |theoretically |be |
expressed |by |any |other |organism
Imagine |you |have |discovered |a |new |species |of |bacteria. |To |begin |your |investigation |of |this |
organism, |you |run |an |assay |on |the |total |nucleotide |content |of |the |bacterial |DNA. |If |the |
cytosine |content |of |DNA |from |the |bacterial |cells |is |40%, |what |is |the |adenine |content? |- |
correct |answers10%
Which |of |the |following |does |not |occur |in |prokaryotic |eukaryotic |gene |expression, |but |does |in |
eukaryotic |gene |expression? |- |correct |answersa |Poly-A |tail |is |added |to |the |3' |end |of |an |mRNA |
and |a |cap |is |added |to |the |5' |end
, The |Dystrophin |gene |is |2.3 |million |nucleotides |long, |however |it |only |uses |~12,00 |nucleotides |
to |make |a |protein |consisting |of |3,685 |amino |acids. |This |is |best |explained |by |the |fact |that |- |
correct |answers
Accuracy |in |the |translation |of |mRNA |into |the |primary |structure |of |a |polypeptide |depends |on |
specificity |in |the: |- |correct |answersBonding |of |the |anticodon |to |the |codon |and |the |attachment
|of |amino |acids |to |tRNAs
Streptomycin |is |an |antibiotic |that |interferes |with |the |function |of |the |large |subunit |of |the |
prokaryotic |ribosome. |What |is |the |consequence |of |treating |bacteria |with |streptomycin. |- |
correct |answersimpaired |protein |synthesis
DNA |template |strand |5'-------------3' |
DNA |complementary |strand |3'----------5'
Given |the |locally |unwound |double |strand |above, |in |which |direction |does |the |RNA |polymerase |
move? |- |correct |answers3' |--> |5' |along |the |template |strand
In |the |transcription |event |of |the |previous |DNA, |where |would |the |promoter |be |located? |- |
correct |answersTo |the |right |of |the |template |strand
What |enzyme |catalyzes |the |attachment |of |an |amino |acid |to |tRNA? |- |correct |
answersaminoacyl-tRNA |synthetase
Osmosis |occurs |as |water |can |cross |the |lipid |bilayer |through |specialized |channels |for |water |
movement |called |________. |- |correct |answersaquaporins
Long |saturated |fatty |acid |tails |_______ |lipid |mobility |and |_________ |membrane |fluidity. |- |
correct |answersreduce, |decrease
Which |of |the |following |would |likely |move |through |the |phosolipic |bilayer |of |a |membrane |most |
rapidly? |
