Bio 172 Exam 1 Questions With Correct
Answers
What |statement |is |supported |by |the |Cell |Theory? |- |CORRECT |ANSWER✔✔-Archaea, |Bacteria |
and |Eukarya |contain |DNA |as |the |genetic |material
Which |branches |in |the |tree |of |life |contain |the |following |properties: |DNA |as |their |genetic |
material, |unicellular, |phospholipids |in |their |cell |membranes, |proteins |with |quaternary |
structure, |alpha-linked |polysaccharides, |and |nucleotides |with |a |hydroxl |at |the |2' |position? |- |
CORRECT |ANSWER✔✔-Eukarya, |Bacteria |and |Archaea
The |element |nitrogen |(N) |has |an |atomic |number |of |7. |You |are |using |two |different |isotopes |of |
nitrogen |in |the |lab, |14N |and |15N.
What |is |true? |- |CORRECT |ANSWER✔✔-15 |N |has |one |more |neutron |than |14N
In |our |atmosphere, |oxygen |can |be |in |the |form |of |O2. |Our |cells |are |dependent |on |O2 |being |
available |in |the |cell. |What |types |of |interactions |would |you |not |expect |to |find |between |O2 |and
|water |molecules |in |the |cell? |- |CORRECT |ANSWER✔✔--hydrogen |bonds |with |the |oxygen |in |
H2O
-hydrogen |bonds |with |the |hydrogen |in |H2O
-Van |der |Waals |interactions |with |the |hydrogen |in |H2O
-covalent |bonds |with |the |oxygen |in |H2O
Water |molecules |can |make |hydrogen |bonds |with |each |other. |What |is |FALSE |about |hydrogen |
bonds |and |water |molecules. |- |CORRECT |ANSWER✔✔-Hydrogen |bonds |occur |between |the |
oxygen |and |the |hydrogen |of |a |single |water |molecule
, Below |is |a |series |of |statements |describing |protein |structure. |Choose |the |statement |that |
correctly |describes |a |level |of |protein |structure. |- |CORRECT |ANSWER✔✔-Peptide |bonds |form |
between |the |amino |group |(N-terminus) |of |the |first |amino |acid |and |the |carboxyl |group |(C-
terminus |of |the |second |amino |acid)
The |COVID-19 |virus |has |an |enzyme |called |RNA |polymerase |that |makes |RNA |nucleic |acid |
strands |for |the |virus |when |it |replicates. |The |RNA |polymerase |enzyme |from |COVID-19 |was |
studied |and |found |to |be |composed |of |3 |polypeptide |subunits. |What |is |true |about |the |RNA |
polymerase |enzyme |from |COVID-19? |- |CORRECT |ANSWER✔✔-The |COVID-19 |RNA |polymerase |
enzyme |has |quaternary |structure
How |might |an |integral |membrane |protein |get |denatures? |- |CORRECT |ANSWER✔✔-raise |the |
pH |in |the |cell
The |following |statements |compare |hydrolysis |and |condensation. |Which |of |the |following |
comparisons |is |false |- |CORRECT |ANSWER✔✔-Condensation |reactions |break |covalent |bonds, |
hydrolysis |reactions |make |covalent |bonds
What |is |the |most |accurate |description |of |the |role |of |enzymes |in |catalyzing |biochemical |
reactions? |- |CORRECT |ANSWER✔✔-Enzymes |bind |to |substrates |and |stabilize |the |transition |
state |so |that |the |activation |energy |is |lowered
Enzymes |serve |as |catalysts |for |linking |together |monosaccharides |into |polysaccharides. |What |is
|true |about |the |biochemical |processes |that |take |place |to |make |polysaccharides? |- |CORRECT |
ANSWER✔✔-Overall, |the |reactions |must |be |exergonic
Catalase |is |an |enzyme |in |peroxisomes |that |breaks |down |hydrogen |peroxide |(H202) |into |
oxygen |and |water. |The |Km |of |catalase |is |14 |mM |H202. |The |rate |of |reaction |with |14 |mM |of |
H202 |is |42 |um/min. |Using |these |values, |calculate |the |numerical |value |of |Vmax. |- |CORRECT |
ANSWER✔✔-84 |um/min
Answers
What |statement |is |supported |by |the |Cell |Theory? |- |CORRECT |ANSWER✔✔-Archaea, |Bacteria |
and |Eukarya |contain |DNA |as |the |genetic |material
Which |branches |in |the |tree |of |life |contain |the |following |properties: |DNA |as |their |genetic |
material, |unicellular, |phospholipids |in |their |cell |membranes, |proteins |with |quaternary |
structure, |alpha-linked |polysaccharides, |and |nucleotides |with |a |hydroxl |at |the |2' |position? |- |
CORRECT |ANSWER✔✔-Eukarya, |Bacteria |and |Archaea
The |element |nitrogen |(N) |has |an |atomic |number |of |7. |You |are |using |two |different |isotopes |of |
nitrogen |in |the |lab, |14N |and |15N.
What |is |true? |- |CORRECT |ANSWER✔✔-15 |N |has |one |more |neutron |than |14N
In |our |atmosphere, |oxygen |can |be |in |the |form |of |O2. |Our |cells |are |dependent |on |O2 |being |
available |in |the |cell. |What |types |of |interactions |would |you |not |expect |to |find |between |O2 |and
|water |molecules |in |the |cell? |- |CORRECT |ANSWER✔✔--hydrogen |bonds |with |the |oxygen |in |
H2O
-hydrogen |bonds |with |the |hydrogen |in |H2O
-Van |der |Waals |interactions |with |the |hydrogen |in |H2O
-covalent |bonds |with |the |oxygen |in |H2O
Water |molecules |can |make |hydrogen |bonds |with |each |other. |What |is |FALSE |about |hydrogen |
bonds |and |water |molecules. |- |CORRECT |ANSWER✔✔-Hydrogen |bonds |occur |between |the |
oxygen |and |the |hydrogen |of |a |single |water |molecule
, Below |is |a |series |of |statements |describing |protein |structure. |Choose |the |statement |that |
correctly |describes |a |level |of |protein |structure. |- |CORRECT |ANSWER✔✔-Peptide |bonds |form |
between |the |amino |group |(N-terminus) |of |the |first |amino |acid |and |the |carboxyl |group |(C-
terminus |of |the |second |amino |acid)
The |COVID-19 |virus |has |an |enzyme |called |RNA |polymerase |that |makes |RNA |nucleic |acid |
strands |for |the |virus |when |it |replicates. |The |RNA |polymerase |enzyme |from |COVID-19 |was |
studied |and |found |to |be |composed |of |3 |polypeptide |subunits. |What |is |true |about |the |RNA |
polymerase |enzyme |from |COVID-19? |- |CORRECT |ANSWER✔✔-The |COVID-19 |RNA |polymerase |
enzyme |has |quaternary |structure
How |might |an |integral |membrane |protein |get |denatures? |- |CORRECT |ANSWER✔✔-raise |the |
pH |in |the |cell
The |following |statements |compare |hydrolysis |and |condensation. |Which |of |the |following |
comparisons |is |false |- |CORRECT |ANSWER✔✔-Condensation |reactions |break |covalent |bonds, |
hydrolysis |reactions |make |covalent |bonds
What |is |the |most |accurate |description |of |the |role |of |enzymes |in |catalyzing |biochemical |
reactions? |- |CORRECT |ANSWER✔✔-Enzymes |bind |to |substrates |and |stabilize |the |transition |
state |so |that |the |activation |energy |is |lowered
Enzymes |serve |as |catalysts |for |linking |together |monosaccharides |into |polysaccharides. |What |is
|true |about |the |biochemical |processes |that |take |place |to |make |polysaccharides? |- |CORRECT |
ANSWER✔✔-Overall, |the |reactions |must |be |exergonic
Catalase |is |an |enzyme |in |peroxisomes |that |breaks |down |hydrogen |peroxide |(H202) |into |
oxygen |and |water. |The |Km |of |catalase |is |14 |mM |H202. |The |rate |of |reaction |with |14 |mM |of |
H202 |is |42 |um/min. |Using |these |values, |calculate |the |numerical |value |of |Vmax. |- |CORRECT |
ANSWER✔✔-84 |um/min
