Bio 172 Exam 3 Questions With Correct
Answers
A |nanometer |is |defined |as |: |- |CORRECT |ANSWER✔✔-10 |- |⁹
Resolution |and |contrast |are |two |critical |factors |that |influence |your |ability |to |see |an |object |. |
Explain |each |. |- |CORRECT |ANSWER✔✔-Resolution |refers |to |the |distance |between |two |objects |
at |which |the |objects |still |can |be |seen |as |separate. |Contrast |is |the |difference |in |light |
absorbable |between |2 |objects.
Assuming |a |constant |( |non |- |adjustable |) |light |source |power |, |identify |the |part |of |the |
microscope |you |would |adjust |to |limit |the |amount |of |light |entering |the |microscope |. |- |
CORRECT |ANSWER✔✔-Iris |diaphragm
What |is |the |total |magnification |( |relative |to |your |eye |) |of |a |sample |imaged |with |a |60x |
objective |and |a |10x |eyepiece |? |Show |your |math |. |- |CORRECT |ANSWER✔✔-60 |x |10 |= |600x |
magnification
True |or |False |: |Staining |is |often |required |to |image |a |cell |that |is |adherent |and |flat |( |thin |- |
CORRECT |ANSWER✔✔-True
Which |of |the |following |could |be |seen |clearly |by |the |unaided |eye |? |Select |all |that |apply |. |- |
CORRECT |ANSWER✔✔-Protozoa |with |diameter |of |150 |um |and |Skin |cell |with |diameter |of |1500
|µm
This |type |of |microscope |utilizes |ultraviolet |( |UV |) |light |to |illuminate |stained |objects |- |CORRECT |
ANSWER✔✔-Fluorescence
Answers
A |nanometer |is |defined |as |: |- |CORRECT |ANSWER✔✔-10 |- |⁹
Resolution |and |contrast |are |two |critical |factors |that |influence |your |ability |to |see |an |object |. |
Explain |each |. |- |CORRECT |ANSWER✔✔-Resolution |refers |to |the |distance |between |two |objects |
at |which |the |objects |still |can |be |seen |as |separate. |Contrast |is |the |difference |in |light |
absorbable |between |2 |objects.
Assuming |a |constant |( |non |- |adjustable |) |light |source |power |, |identify |the |part |of |the |
microscope |you |would |adjust |to |limit |the |amount |of |light |entering |the |microscope |. |- |
CORRECT |ANSWER✔✔-Iris |diaphragm
What |is |the |total |magnification |( |relative |to |your |eye |) |of |a |sample |imaged |with |a |60x |
objective |and |a |10x |eyepiece |? |Show |your |math |. |- |CORRECT |ANSWER✔✔-60 |x |10 |= |600x |
magnification
True |or |False |: |Staining |is |often |required |to |image |a |cell |that |is |adherent |and |flat |( |thin |- |
CORRECT |ANSWER✔✔-True
Which |of |the |following |could |be |seen |clearly |by |the |unaided |eye |? |Select |all |that |apply |. |- |
CORRECT |ANSWER✔✔-Protozoa |with |diameter |of |150 |um |and |Skin |cell |with |diameter |of |1500
|µm
This |type |of |microscope |utilizes |ultraviolet |( |UV |) |light |to |illuminate |stained |objects |- |CORRECT |
ANSWER✔✔-Fluorescence
