Human Physiology Practice Exam With
Answers
The |rate |at |which |a |chemical |reaction |can |be |increased |by |either |________________ |the |
temperature |or |__________ |the |activation |energy. |- |VERIFIED |ANSWERS |**✔Increasing, |decreasing
Which |of |the |following |statements |about |enzymes |is |NOT |true?
A. |enzymes |increase |chemical |reaction |rate |
B. |enzymes |are |consumed |during |a |chemical |reaction |
C. |enzymes |decrease |the |free |energy |of |activation |of |specific |reactions |
D. |enzymes |have |unique |pH |and |temperature |optima |- |VERIFIED |ANSWERS |**✔Enzymes |are |
consumed |during |a |chemical |reaction
The |model |that |explains |how |an |enzyme |and |substrate |fit |together |is |the |- |VERIFIED |ANSWERS |
**✔Lock-and-key |Model.
The |level |of |protein |structure |primarily |involved |in |determining |enzyme |activity |is |the |
A. |primary |structure |
B. |secondary |structure |
C. |tertiary |structure |
D. |quaternary |structure |- |VERIFIED |ANSWERS |**✔tertiary |structure
Reactant |molecules |of |enzyme |action |are |called |- |VERIFIED |ANSWERS |**✔Substrates
Which |of |the |following |does |not |affect |the |activity |of |an |enzyme?
A. |the |organ |the |enzyme |is |in |
B. |concentration |of |enzyme |and |substrate |molecules
C. |concentration |of |cofactors |and |coenzymes |
D. |pH |and |temperature |- |VERIFIED |ANSWERS |**✔The |organ |the |enzyme |is |in
,In |an |enzymatic |reaction |when |temperature |is |increased |past |the |point |of |"optimal |temperature, |" |
the |enzyme |starts |to |
A. |increase |its |catalytic |activity |
B. |reduce |its |catalytic |activity |
C. |increase |its |allosteric |properties |
D. |increase |product |formation |- |VERIFIED |ANSWERS |**✔Reduce |its |catalytic |activity
Which |of |the |following |is |not |true |of |catalysts? |
A. |they |are |unchanged |by |the |reaction |catalyzed |
B. |they |allow |endergonic |actions |to |become |exergonic |reactions |
C. |They |increase |the |amount |of |energy |released |by |a |chemical |reaction |
D. |they |lower |the |activation |energy |of |the |reaction |- |VERIFIED |ANSWERS |**✔They |allow |
endergonic |reactions |to |become |exergonic |reactions
Regulation |of |a |metabolic |pathway |by |the |final |project |of |the |pathway |is |termed |
A. |allosteric |inhibition |
B. |end |product |inhibition |
C. |negative |feedback |
D. |both |end- |product |inhibition |and |negative |feedback |are |correct |- |VERIFIED |ANSWERS |**✔Both |
end- |product |inhibition |and |negative |feedback |are |correct
Energy |can |change |forms |but |cannot |be |created |or |destroyed |is |a |statement |of |the |
A. |first |law |of |thermodynamics |
B. |second |law |of |thermodynamics |
C. |law |of |mass |action |
D. |third |law |of |thermodynamics |- |VERIFIED |ANSWERS |**✔First |law |of |thermodynamics
A |_______________ |is |the |amount |of |heat |required |to |raise |the |temperature |of |1 |cubic |centimeter |
of |water |1 |degree |on |the |Celsius |scale |- |VERIFIED |ANSWERS |**✔Calorie
, A |food |calorie |(Calorie) |is |equivalent |to |which |metric |measurement |of |heat? |- |VERIFIED |ANSWERS |
**✔Kilocalorie
________________ |Is |the |universal |energy |carrier |- |VERIFIED |ANSWERS |**✔ATP
NAD |is |derived |from |the |vitamin |- |VERIFIED |ANSWERS |**✔B-3, |niacin
FAD |is |derived |from |vitamin |- |VERIFIED |ANSWERS |**✔B-2, |riboflavin
During |oxidation, |a |molecule |or |atom |- |VERIFIED |ANSWERS |**✔Loses |electrons
During |reduction, |a |molecule |or |atom |- |VERIFIED |ANSWERS |**✔Gains |protons |or |gains |electrons
FAD |& |NAD |are |coenzymes |that |act |as |____________ |in |biochemical |reactions |- |VERIFIED |ANSWERS
|**✔Hydrogen |carriers
___________________ |Reactions |require |energy |to |synthesize |large |molecules |from |small |molecules
|- |VERIFIED |ANSWERS |**✔Anabolic
Which |of |the |following |is |NOT |a |primary |catabolic |source |of |energy |to |produce |ATP?
A. |fatty |acids |
B. |cholesterol |
C. |amino |acids |
D. |glucose |- |VERIFIED |ANSWERS |**✔Cholesterol
Glycolysis |converts |glucose |into |two |________________ |molecules |- |VERIFIED |ANSWERS |**✔Pyruvic
|avid
Answers
The |rate |at |which |a |chemical |reaction |can |be |increased |by |either |________________ |the |
temperature |or |__________ |the |activation |energy. |- |VERIFIED |ANSWERS |**✔Increasing, |decreasing
Which |of |the |following |statements |about |enzymes |is |NOT |true?
A. |enzymes |increase |chemical |reaction |rate |
B. |enzymes |are |consumed |during |a |chemical |reaction |
C. |enzymes |decrease |the |free |energy |of |activation |of |specific |reactions |
D. |enzymes |have |unique |pH |and |temperature |optima |- |VERIFIED |ANSWERS |**✔Enzymes |are |
consumed |during |a |chemical |reaction
The |model |that |explains |how |an |enzyme |and |substrate |fit |together |is |the |- |VERIFIED |ANSWERS |
**✔Lock-and-key |Model.
The |level |of |protein |structure |primarily |involved |in |determining |enzyme |activity |is |the |
A. |primary |structure |
B. |secondary |structure |
C. |tertiary |structure |
D. |quaternary |structure |- |VERIFIED |ANSWERS |**✔tertiary |structure
Reactant |molecules |of |enzyme |action |are |called |- |VERIFIED |ANSWERS |**✔Substrates
Which |of |the |following |does |not |affect |the |activity |of |an |enzyme?
A. |the |organ |the |enzyme |is |in |
B. |concentration |of |enzyme |and |substrate |molecules
C. |concentration |of |cofactors |and |coenzymes |
D. |pH |and |temperature |- |VERIFIED |ANSWERS |**✔The |organ |the |enzyme |is |in
,In |an |enzymatic |reaction |when |temperature |is |increased |past |the |point |of |"optimal |temperature, |" |
the |enzyme |starts |to |
A. |increase |its |catalytic |activity |
B. |reduce |its |catalytic |activity |
C. |increase |its |allosteric |properties |
D. |increase |product |formation |- |VERIFIED |ANSWERS |**✔Reduce |its |catalytic |activity
Which |of |the |following |is |not |true |of |catalysts? |
A. |they |are |unchanged |by |the |reaction |catalyzed |
B. |they |allow |endergonic |actions |to |become |exergonic |reactions |
C. |They |increase |the |amount |of |energy |released |by |a |chemical |reaction |
D. |they |lower |the |activation |energy |of |the |reaction |- |VERIFIED |ANSWERS |**✔They |allow |
endergonic |reactions |to |become |exergonic |reactions
Regulation |of |a |metabolic |pathway |by |the |final |project |of |the |pathway |is |termed |
A. |allosteric |inhibition |
B. |end |product |inhibition |
C. |negative |feedback |
D. |both |end- |product |inhibition |and |negative |feedback |are |correct |- |VERIFIED |ANSWERS |**✔Both |
end- |product |inhibition |and |negative |feedback |are |correct
Energy |can |change |forms |but |cannot |be |created |or |destroyed |is |a |statement |of |the |
A. |first |law |of |thermodynamics |
B. |second |law |of |thermodynamics |
C. |law |of |mass |action |
D. |third |law |of |thermodynamics |- |VERIFIED |ANSWERS |**✔First |law |of |thermodynamics
A |_______________ |is |the |amount |of |heat |required |to |raise |the |temperature |of |1 |cubic |centimeter |
of |water |1 |degree |on |the |Celsius |scale |- |VERIFIED |ANSWERS |**✔Calorie
, A |food |calorie |(Calorie) |is |equivalent |to |which |metric |measurement |of |heat? |- |VERIFIED |ANSWERS |
**✔Kilocalorie
________________ |Is |the |universal |energy |carrier |- |VERIFIED |ANSWERS |**✔ATP
NAD |is |derived |from |the |vitamin |- |VERIFIED |ANSWERS |**✔B-3, |niacin
FAD |is |derived |from |vitamin |- |VERIFIED |ANSWERS |**✔B-2, |riboflavin
During |oxidation, |a |molecule |or |atom |- |VERIFIED |ANSWERS |**✔Loses |electrons
During |reduction, |a |molecule |or |atom |- |VERIFIED |ANSWERS |**✔Gains |protons |or |gains |electrons
FAD |& |NAD |are |coenzymes |that |act |as |____________ |in |biochemical |reactions |- |VERIFIED |ANSWERS
|**✔Hydrogen |carriers
___________________ |Reactions |require |energy |to |synthesize |large |molecules |from |small |molecules
|- |VERIFIED |ANSWERS |**✔Anabolic
Which |of |the |following |is |NOT |a |primary |catabolic |source |of |energy |to |produce |ATP?
A. |fatty |acids |
B. |cholesterol |
C. |amino |acids |
D. |glucose |- |VERIFIED |ANSWERS |**✔Cholesterol
Glycolysis |converts |glucose |into |two |________________ |molecules |- |VERIFIED |ANSWERS |**✔Pyruvic
|avid
