Experiment C: cell biology

Question 1

what is the nature of cells of unstained (living) specimens?

Answer 1

they are completely transparent

Question 2

how can transparent cells be viewed under the microscope without staining them?

Answer 2

by partially closing the sub-stage diaphragm to increase contrast

Question 3

what is the diameter of prokaryotic cells?

Answer 3

0.1 to 5.0 μm

Question 4

what is the diameter of eukaryotic cells?

Answer 4

10 to 100 μm

practical brief says 1-2 μm but no sources verify this

Question 5

how is movement generated in cells?

Answer 5

by motor proteins eg. myosin interaction with actin microfilaments; dynein and kinesin interaction with microtubules

Question 6

how is movement generated in Paramecium?

Answer 6

ciliate; microtubule-based motility

Question 7

how is movement generated in Amoeba?

Answer 7

protozoan; amoeboid movement generated by actin and myosin

Question 8

how is movement generated in white blood cells

Answer 8

by amoeboid movement generated by actin and myosin