Biology 1001 Exam 2 (LSU-Hrincevich)
Questions With Correct Answers
CHAPTER |5: |Within |the |fluid |mosaic |of |a |plasma |membrane, |what |is |the |role |of |transport |and |
channel |proteins? |- |CORRECT |ANSWER✔✔-They |permit |salts |and |sugars |to |move |through |the |
plasma |membrane.
CHAPTER |5: |If |red |blood |cells |are |taken |from |the |body |and |placed |in |a |hypertonic |solution, |
what |happens |to |the |cells? |- |CORRECT |ANSWER✔✔-The |cells |shrivel |up |because |water |leaves |
them.
CHAPTER |5: |Plasma |membranes |are |BEST |described |as |a |what? |- |CORRECT |ANSWER✔✔-single
|layer |of |phospholipids |with |tails |pointed |toward |the |inside |of |the |cell.
CHAPTER |5: |Osmosis |moves |water |from |a |region |of |what |to |what? |- |CORRECT |ANSWER✔✔-
low |concentration |of |dissolved |material |to |a |region |of |high |concentration.
CHAPTER |5: |More |than |half |a |century |ago, |two |cell |biologists |published |details |of |their |
research |involving |isolated |membrane |vesicles |from |chloroplasts. |Normally, |the |fluid |inside |
these |vesicles |is |near |neutral. |In |an |experiment, |these |membrane |vesicles |were |soaked |in |an |
acidic |solution |(pH |4) |until |the |inside |of |the |vesicle |also |became |pH |4. |Based |on |the |details |
provided |in |this |scenario, |by |what |mechanism |could |hydrogen |ions |have |crossed |the |vesicle |
membrane, |and |what |do |you |think |happened |at |the |molecular |level? |- |CORRECT |ANSWER✔✔-
Facilitated |diffusion; |hydrogen |ions |moved |into |the |vesicle |through |a |channel.
CHAPTER |5: |Suppose |that |plasma |membranes |were |single |layers |of |phospholipids |with |heads |
facing |the |external |environment. |The |interior |of |this |hypothetical |cell |would |have |to |be |what?
|- |CORRECT |ANSWER✔✔-hydrophobic |and |nonpolar.
, CHAPTER |5: |The |cytoplasm |of |a |certain |cell, |such |as |a |neuron, |already |has |a |high |
concentration |of |potassium |ions. |How |can |potassium |ions |continue |to |enter |the |cell? |- |
CORRECT |ANSWER✔✔-active |transport
CHAPTER |5: |The |blood |plasma |of |a |man |who |drinks |saltwater |will |become |________ |to |his |
red |blood |cells, |whereas |the |red |blood |cells |will |be |________ |to |the |blood |plasma. |Which |
statement |below |correctly |completes |the |statement? |- |CORRECT |ANSWER✔✔-hypertonic; |
hypotonic
CHAPTER |5: |Which |of |the |following |types |of |membrane |proteins |are |responsible |for |conveying
|external |messages |such |as |those |sent |by |a |hormone |signal? |- |CORRECT |ANSWER✔✔-receptor
|proteins
CHAPTER |5: |The |hydrophobic |tails |of |a |phospholipid |bilayer |are |oriented |toward |the |what? |- |
CORRECT |ANSWER✔✔-interior |of |the |plasma |membrane |(i.e., |toward |one |another).
CHAPTER |6: |The |optimum |reaction |rate |of |a |particular |enzyme |occurs |at |pH |7.3 |at |37 |degrees |
C. |This |reaction |would |probably |proceed |faster |by |doing |what? |- |CORRECT |ANSWER✔✔-
increasing |the |temperature |to |38 |degrees |C |and |keeping |the |pH |at |7.3.
CHAPTER |6: |Similar |to |a |car, |a |human |body |is |approximately |how |efficient |in |converting |
chemical |energy |to |movement? |- |CORRECT |ANSWER✔✔-25%
CHAPTER |6: |All |of |the |following |statements |pertaining |to |catalysts |are |true |EXCEPT |which |one?
|- |CORRECT |ANSWER✔✔-catalysts |increase |activation |energy |requirements.
CHAPTER |6: |Imagine |you |are |conducting |an |experiment |on |an |enzyme |known |as |sucrase. |This |
enzyme |is |synthesized |and |used |by |yeast |cells |to |break |down |the |disaccharide |sucrose |(table |
sugar) |into |the |monosaccharides |glucose |and |fructose. |You |decide |to |conduct |an |experiment |
to |test |whether |the |sucrase |enzyme |can |break |down |the |artificial |sweetener |sucralose. |
Sucralose |(a |"chlorinated" |carbohydrate) |has |some |chemical |similarity |to |sucrose, |but |is |
different |in |that |three |of |its |hydroxyl |groups |are |missing |and |replaced |with |chlorine |atoms |
Questions With Correct Answers
CHAPTER |5: |Within |the |fluid |mosaic |of |a |plasma |membrane, |what |is |the |role |of |transport |and |
channel |proteins? |- |CORRECT |ANSWER✔✔-They |permit |salts |and |sugars |to |move |through |the |
plasma |membrane.
CHAPTER |5: |If |red |blood |cells |are |taken |from |the |body |and |placed |in |a |hypertonic |solution, |
what |happens |to |the |cells? |- |CORRECT |ANSWER✔✔-The |cells |shrivel |up |because |water |leaves |
them.
CHAPTER |5: |Plasma |membranes |are |BEST |described |as |a |what? |- |CORRECT |ANSWER✔✔-single
|layer |of |phospholipids |with |tails |pointed |toward |the |inside |of |the |cell.
CHAPTER |5: |Osmosis |moves |water |from |a |region |of |what |to |what? |- |CORRECT |ANSWER✔✔-
low |concentration |of |dissolved |material |to |a |region |of |high |concentration.
CHAPTER |5: |More |than |half |a |century |ago, |two |cell |biologists |published |details |of |their |
research |involving |isolated |membrane |vesicles |from |chloroplasts. |Normally, |the |fluid |inside |
these |vesicles |is |near |neutral. |In |an |experiment, |these |membrane |vesicles |were |soaked |in |an |
acidic |solution |(pH |4) |until |the |inside |of |the |vesicle |also |became |pH |4. |Based |on |the |details |
provided |in |this |scenario, |by |what |mechanism |could |hydrogen |ions |have |crossed |the |vesicle |
membrane, |and |what |do |you |think |happened |at |the |molecular |level? |- |CORRECT |ANSWER✔✔-
Facilitated |diffusion; |hydrogen |ions |moved |into |the |vesicle |through |a |channel.
CHAPTER |5: |Suppose |that |plasma |membranes |were |single |layers |of |phospholipids |with |heads |
facing |the |external |environment. |The |interior |of |this |hypothetical |cell |would |have |to |be |what?
|- |CORRECT |ANSWER✔✔-hydrophobic |and |nonpolar.
, CHAPTER |5: |The |cytoplasm |of |a |certain |cell, |such |as |a |neuron, |already |has |a |high |
concentration |of |potassium |ions. |How |can |potassium |ions |continue |to |enter |the |cell? |- |
CORRECT |ANSWER✔✔-active |transport
CHAPTER |5: |The |blood |plasma |of |a |man |who |drinks |saltwater |will |become |________ |to |his |
red |blood |cells, |whereas |the |red |blood |cells |will |be |________ |to |the |blood |plasma. |Which |
statement |below |correctly |completes |the |statement? |- |CORRECT |ANSWER✔✔-hypertonic; |
hypotonic
CHAPTER |5: |Which |of |the |following |types |of |membrane |proteins |are |responsible |for |conveying
|external |messages |such |as |those |sent |by |a |hormone |signal? |- |CORRECT |ANSWER✔✔-receptor
|proteins
CHAPTER |5: |The |hydrophobic |tails |of |a |phospholipid |bilayer |are |oriented |toward |the |what? |- |
CORRECT |ANSWER✔✔-interior |of |the |plasma |membrane |(i.e., |toward |one |another).
CHAPTER |6: |The |optimum |reaction |rate |of |a |particular |enzyme |occurs |at |pH |7.3 |at |37 |degrees |
C. |This |reaction |would |probably |proceed |faster |by |doing |what? |- |CORRECT |ANSWER✔✔-
increasing |the |temperature |to |38 |degrees |C |and |keeping |the |pH |at |7.3.
CHAPTER |6: |Similar |to |a |car, |a |human |body |is |approximately |how |efficient |in |converting |
chemical |energy |to |movement? |- |CORRECT |ANSWER✔✔-25%
CHAPTER |6: |All |of |the |following |statements |pertaining |to |catalysts |are |true |EXCEPT |which |one?
|- |CORRECT |ANSWER✔✔-catalysts |increase |activation |energy |requirements.
CHAPTER |6: |Imagine |you |are |conducting |an |experiment |on |an |enzyme |known |as |sucrase. |This |
enzyme |is |synthesized |and |used |by |yeast |cells |to |break |down |the |disaccharide |sucrose |(table |
sugar) |into |the |monosaccharides |glucose |and |fructose. |You |decide |to |conduct |an |experiment |
to |test |whether |the |sucrase |enzyme |can |break |down |the |artificial |sweetener |sucralose. |
Sucralose |(a |"chlorinated" |carbohydrate) |has |some |chemical |similarity |to |sucrose, |but |is |
different |in |that |three |of |its |hydroxyl |groups |are |missing |and |replaced |with |chlorine |atoms |
