Biology 111 Exam 2 Questions With
Correct Answers
The |compounds |of |biological |membranes |that |form |a |barrier |to |the |movement |of |hydrophilic |
materials |across |the |membrane |are? |- |CORRECT |ANSWER✔✔-Lipids
Which |of |the |following |statements |about |cholesterol |molecules |is |true? |- |CORRECT |
ANSWER✔✔-They |alter |the |fluidity |of |the |membrane
The |hydrophilic |regions |of |a |membrane |protein |are |most |likely |to |be |found? |- |CORRECT |
ANSWER✔✔-Exposed |on |the |surface |of |the |membrane
Competitive |inhibitors |of |enzymes |work |by? |- |CORRECT |ANSWER✔✔-Fitting |into |the |active |
site
this |functions |as |a |recognition |signal |for |interactions |between |the |cells? |- |CORRECT |
ANSWER✔✔-Glycolipids
The |difference |between |tight |junctions, |desmosomes, |and |gap |junctions |is |that? |- |CORRECT |
ANSWER✔✔-Tight |junctions |desmosomes |have |mechanical |roles, |where |as |gap |junctions |
facilitate |communication |between |cells
Which |of |the |following |is |an |example |of |passive |transport? |- |CORRECT |ANSWER✔✔-Facilitated
|diffusion
Which |of |the |following |molecules |is |the |most |likely |simply |to |diffuse |across |a |cell |membrane?
|- |CORRECT |ANSWER✔✔-A |steroid
, The |difference |between |osmosis |and |diffusion? |- |CORRECT |ANSWER✔✔-Osmosis |refers |
specifically |to |the |movement |of |water |across |a |membrane, |whereas |diffusion |is |the |
movement |of |molecules.
Osmosis |moves |water |from |a |region |of |___ |to |a |region |of |___? |- |CORRECT |ANSWER✔✔-Low |
concentration |of |dissolved |material; |High |concentration |of |dissolved |material
Osmosis |helps |plant |cells |maintain.. |- |CORRECT |ANSWER✔✔-turgor |pressure
When |a |severely |dehydrated |patient |is |brought |to |the |hospital, |an |IV |of |normal |saline |is |
started |immediately. |Distilled |water |is |not |used |because? |- |CORRECT |ANSWER✔✔-It |would |
cause |the |patients |blood |cells |to |swell |and |eventually |burst
The |speed |and |direction |of |ions |as |they |move |into |and |out |of |the |cell |are |determined |by |the?
|- |CORRECT |ANSWER✔✔-Concentration |gradient |and |electrochemical |imbalances
In |facilitated |diffusion, |the |diffusion |rate |of |a |specific |molecule |across |a |membrane |does |not |
continue |to |increase |as |the |concentration |difference |of |the |molecule |across |the |membrane |
increases. |This |is |the |case |because? |- |CORRECT |ANSWER✔✔-The |carrier |proteins |are |
saturated.
Plant |cells |transport |sucrose |across |the |vacuole |membrane |against |its |concentration |gradient |
by |a |process |known |as? |- |CORRECT |ANSWER✔✔-Active |transport
How |does |the |second |law |of |thermodynamics |apply |to |organisms? |- |CORRECT |ANSWER✔✔-To
|maintain |order, |life |requires |a |constant |input |of |energy
Which |of |the |following |represents |potential |energy? |- |CORRECT |ANSWER✔✔-- |Chemical |
bonds
- |Concentration |gradient
Correct Answers
The |compounds |of |biological |membranes |that |form |a |barrier |to |the |movement |of |hydrophilic |
materials |across |the |membrane |are? |- |CORRECT |ANSWER✔✔-Lipids
Which |of |the |following |statements |about |cholesterol |molecules |is |true? |- |CORRECT |
ANSWER✔✔-They |alter |the |fluidity |of |the |membrane
The |hydrophilic |regions |of |a |membrane |protein |are |most |likely |to |be |found? |- |CORRECT |
ANSWER✔✔-Exposed |on |the |surface |of |the |membrane
Competitive |inhibitors |of |enzymes |work |by? |- |CORRECT |ANSWER✔✔-Fitting |into |the |active |
site
this |functions |as |a |recognition |signal |for |interactions |between |the |cells? |- |CORRECT |
ANSWER✔✔-Glycolipids
The |difference |between |tight |junctions, |desmosomes, |and |gap |junctions |is |that? |- |CORRECT |
ANSWER✔✔-Tight |junctions |desmosomes |have |mechanical |roles, |where |as |gap |junctions |
facilitate |communication |between |cells
Which |of |the |following |is |an |example |of |passive |transport? |- |CORRECT |ANSWER✔✔-Facilitated
|diffusion
Which |of |the |following |molecules |is |the |most |likely |simply |to |diffuse |across |a |cell |membrane?
|- |CORRECT |ANSWER✔✔-A |steroid
, The |difference |between |osmosis |and |diffusion? |- |CORRECT |ANSWER✔✔-Osmosis |refers |
specifically |to |the |movement |of |water |across |a |membrane, |whereas |diffusion |is |the |
movement |of |molecules.
Osmosis |moves |water |from |a |region |of |___ |to |a |region |of |___? |- |CORRECT |ANSWER✔✔-Low |
concentration |of |dissolved |material; |High |concentration |of |dissolved |material
Osmosis |helps |plant |cells |maintain.. |- |CORRECT |ANSWER✔✔-turgor |pressure
When |a |severely |dehydrated |patient |is |brought |to |the |hospital, |an |IV |of |normal |saline |is |
started |immediately. |Distilled |water |is |not |used |because? |- |CORRECT |ANSWER✔✔-It |would |
cause |the |patients |blood |cells |to |swell |and |eventually |burst
The |speed |and |direction |of |ions |as |they |move |into |and |out |of |the |cell |are |determined |by |the?
|- |CORRECT |ANSWER✔✔-Concentration |gradient |and |electrochemical |imbalances
In |facilitated |diffusion, |the |diffusion |rate |of |a |specific |molecule |across |a |membrane |does |not |
continue |to |increase |as |the |concentration |difference |of |the |molecule |across |the |membrane |
increases. |This |is |the |case |because? |- |CORRECT |ANSWER✔✔-The |carrier |proteins |are |
saturated.
Plant |cells |transport |sucrose |across |the |vacuole |membrane |against |its |concentration |gradient |
by |a |process |known |as? |- |CORRECT |ANSWER✔✔-Active |transport
How |does |the |second |law |of |thermodynamics |apply |to |organisms? |- |CORRECT |ANSWER✔✔-To
|maintain |order, |life |requires |a |constant |input |of |energy
Which |of |the |following |represents |potential |energy? |- |CORRECT |ANSWER✔✔-- |Chemical |
bonds
- |Concentration |gradient
