Bio 200 Molecular Ecology Prelab
Exam Q&A
You are observing a slide of green cells under the 4X objective. Each cell covers
approximately 1/8th of the width of your field of view. At least, that is what it seems
like...it is hard to get the sample cells to line up exactly and stop rotating. How large
of a diameter do these cells have? Choose the best answer to report to a colleague.
- ANSWER-Each cell is approximately ~500-600 micrometers in diameter,
accounting for inaccuracies and variability.
You make a slide of one of the cells. You did everything correctly, and you think that
you followed your TA's slide-making instructions perfectly. However, you can't see
anything in the microscope that looks like a cell. Which of the following choices could
be a good next step to try? (Choose all options that might be a good idea to try.) -
ANSWER-(choose all the answers)
Remake the slide (sometimes, by luck, you didn't get any of the cells we are looking
for)
Switch to a different objective lens
Use the movement knobs to see a different part of the slide
Use the coarse focus knob to bring better focus
Twist the fine focus knob to bring better focus
Adjust the oculars so you can see more clearly
Adjust the iris diaphram
What is malaria? - ANSWER-A potentially lethal blood borne protozoan parasite
How is malaria contracted? - ANSWER-It is spread by infected mosquito bites
Exam 3
All four exams combined
Polling
Reading Quizzes - ANSWER-110
420
35
74
What should you wear to all labs? - ANSWER--Pants or a long skirt - with fabric
covering the skin of your torso and legs.
-Close toed shoes
What lab 1 specific PPE is required this week? - ANSWER--Gloves when handling
canine blood or stain
-Goggles when handling canine blood or stain
Exam Q&A
You are observing a slide of green cells under the 4X objective. Each cell covers
approximately 1/8th of the width of your field of view. At least, that is what it seems
like...it is hard to get the sample cells to line up exactly and stop rotating. How large
of a diameter do these cells have? Choose the best answer to report to a colleague.
- ANSWER-Each cell is approximately ~500-600 micrometers in diameter,
accounting for inaccuracies and variability.
You make a slide of one of the cells. You did everything correctly, and you think that
you followed your TA's slide-making instructions perfectly. However, you can't see
anything in the microscope that looks like a cell. Which of the following choices could
be a good next step to try? (Choose all options that might be a good idea to try.) -
ANSWER-(choose all the answers)
Remake the slide (sometimes, by luck, you didn't get any of the cells we are looking
for)
Switch to a different objective lens
Use the movement knobs to see a different part of the slide
Use the coarse focus knob to bring better focus
Twist the fine focus knob to bring better focus
Adjust the oculars so you can see more clearly
Adjust the iris diaphram
What is malaria? - ANSWER-A potentially lethal blood borne protozoan parasite
How is malaria contracted? - ANSWER-It is spread by infected mosquito bites
Exam 3
All four exams combined
Polling
Reading Quizzes - ANSWER-110
420
35
74
What should you wear to all labs? - ANSWER--Pants or a long skirt - with fabric
covering the skin of your torso and legs.
-Close toed shoes
What lab 1 specific PPE is required this week? - ANSWER--Gloves when handling
canine blood or stain
-Goggles when handling canine blood or stain
