BI-204 Lab Exam
Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
, safety in the lab - Answer: 1. place food or drinks outside of the lab in intended areas (never eat or drink
anything in lab. no gum!)
2. place bags in cubbies/in intended areas (leave phones in bag)
3. tie up long hair
3. put on apron
4. wash hands
5. wear gloves
6. clean up your work area (bac down)
7. wear safety goggles
8. Follow directions strictly.
**close toed shoes
** turn of bunsen burner if walking away
parts of the microscope and function - Answer: Ocular lens- look through to see the specimen
Base- supports the miscrocope
objectives lenses- magnification ranges from 10x to 40x to 199x
Arm- used to support the microscope when carried
Stage clips- holds the slide in place
Fine adjustment knob- moves the stage slightly to sharpen the image
Diaphragm- used to regulate the amount of light on the specimen
Stage - supports the slide being viewed
Light source- projects the light upwards through the diaphragm , the specimen, and the lenses
Coarse adjustment knob- moves the stage up and down for focusing
Revolving nosepiece- holds the high and low power objectives, can be rotated to change magnification
Condenser- collects and directs the light from the lamp to the slide being studied.
How to focus a microscope - Answer: Turn the revolving turret so that the lowest power objective lens
(eg. 4x) is clicked into position.
Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
, safety in the lab - Answer: 1. place food or drinks outside of the lab in intended areas (never eat or drink
anything in lab. no gum!)
2. place bags in cubbies/in intended areas (leave phones in bag)
3. tie up long hair
3. put on apron
4. wash hands
5. wear gloves
6. clean up your work area (bac down)
7. wear safety goggles
8. Follow directions strictly.
**close toed shoes
** turn of bunsen burner if walking away
parts of the microscope and function - Answer: Ocular lens- look through to see the specimen
Base- supports the miscrocope
objectives lenses- magnification ranges from 10x to 40x to 199x
Arm- used to support the microscope when carried
Stage clips- holds the slide in place
Fine adjustment knob- moves the stage slightly to sharpen the image
Diaphragm- used to regulate the amount of light on the specimen
Stage - supports the slide being viewed
Light source- projects the light upwards through the diaphragm , the specimen, and the lenses
Coarse adjustment knob- moves the stage up and down for focusing
Revolving nosepiece- holds the high and low power objectives, can be rotated to change magnification
Condenser- collects and directs the light from the lamp to the slide being studied.
How to focus a microscope - Answer: Turn the revolving turret so that the lowest power objective lens
(eg. 4x) is clicked into position.
