Biology 1406: Lab Practical #1 Review
Questions Fully Solved 2026-2027
Updated.
THE MICROSCOPE - Answer Lab Exercise #4.
Two types of Microscopes - Answer Stereoscopic/dissecting microscope (10x-30x)
Compound light microscope (40x-400x)
Microscope we use - Answer Compound light microscope (40x-400x)
-use a beam of electrons to form an image of the specimen
-two different lenses that magnify an image twice before it is actually seen
Cells - Answer -the smallest living units
-microscopic
-cannot be seen with the naked eye, only microscopes
Know all parts of the microscope - Answer
Base - Answer provides support that helps stabilize the microscope
the base contains;
-substage light: provides the light that illuminates the specimen
-switch: turns the light on and off
-glass projection lens: covers the light source
Arm - Answer supports the body tube and adjustment knobs
Stage - Answer flat, black platform where the microscope slide is placed for viewing
-condenser: round opening in the stage that light passes through to reach the specimen. It helps
concentrate light into a tight beam before it enters the specimen
, Mechanical stage apparatus (not apart of the drawing) - Answer attached to the stage; has a
spring-loaded slide frame that anchors in place of viewing (left, right, front, back)
Disc/Iris diaphragm - Answer under the stage; a wheel that controls the amount of light
passing through the specimen
Body tube - Answer attached to the arm; contains mirrors that gather light coming from the
lenses and reflect it up to the eyes
Eyepiece (ocular) - Answer -at the top of the body tube
-contains a lens (called the ocular) w/ magnification of 10x
-has a pointer
Revolving Nose-piece - Answer -located at the lower end of the body tube
-has (3) objectives attached to it, that can be changed by rotating the nose-piece
3 different objectives - Answer 1) scanning Objective
2) low power objective
3) high power objective
Scanning Objective - Answer -shortest objective
-magnification of only 4X
Low power objective - Answer -middle objective
-magnification of only 10x
High power objective - Answer -longest objective
-magnification of only 40x
2 different types of focal adjustment knobs - Answer -located on the lower sides of the arm
-adjust the distance between the objective lens and the specimen being observed when
focusing
1) course adjustment knobs
2) fine adjustment knobs
-either raise or lower the stage closer to or farther away from the objective lens
Questions Fully Solved 2026-2027
Updated.
THE MICROSCOPE - Answer Lab Exercise #4.
Two types of Microscopes - Answer Stereoscopic/dissecting microscope (10x-30x)
Compound light microscope (40x-400x)
Microscope we use - Answer Compound light microscope (40x-400x)
-use a beam of electrons to form an image of the specimen
-two different lenses that magnify an image twice before it is actually seen
Cells - Answer -the smallest living units
-microscopic
-cannot be seen with the naked eye, only microscopes
Know all parts of the microscope - Answer
Base - Answer provides support that helps stabilize the microscope
the base contains;
-substage light: provides the light that illuminates the specimen
-switch: turns the light on and off
-glass projection lens: covers the light source
Arm - Answer supports the body tube and adjustment knobs
Stage - Answer flat, black platform where the microscope slide is placed for viewing
-condenser: round opening in the stage that light passes through to reach the specimen. It helps
concentrate light into a tight beam before it enters the specimen
, Mechanical stage apparatus (not apart of the drawing) - Answer attached to the stage; has a
spring-loaded slide frame that anchors in place of viewing (left, right, front, back)
Disc/Iris diaphragm - Answer under the stage; a wheel that controls the amount of light
passing through the specimen
Body tube - Answer attached to the arm; contains mirrors that gather light coming from the
lenses and reflect it up to the eyes
Eyepiece (ocular) - Answer -at the top of the body tube
-contains a lens (called the ocular) w/ magnification of 10x
-has a pointer
Revolving Nose-piece - Answer -located at the lower end of the body tube
-has (3) objectives attached to it, that can be changed by rotating the nose-piece
3 different objectives - Answer 1) scanning Objective
2) low power objective
3) high power objective
Scanning Objective - Answer -shortest objective
-magnification of only 4X
Low power objective - Answer -middle objective
-magnification of only 10x
High power objective - Answer -longest objective
-magnification of only 40x
2 different types of focal adjustment knobs - Answer -located on the lower sides of the arm
-adjust the distance between the objective lens and the specimen being observed when
focusing
1) course adjustment knobs
2) fine adjustment knobs
-either raise or lower the stage closer to or farther away from the objective lens
