If a crystal of potassium permanganate is placed on agar and after 15 minutes the diameter of the area over which the dye has spread is 15 mm, the average diffusion rate is

Diffusion rate is 1.96 × /s

Explanation:

Diffusion is the process in which the molecules of a substance propagates from a region of higher concentration to region of lower concentration through a semi-permeable membrane.

diffusion rate =

Given that; diameter = 15 mm, time = 15 minutes.

The dye spread in a circular form, so that;

area =

r = = = 7.5 mm = 0.75 cm

area = × = 1.7679

time = 15 minutes = 15 × 60 = 900 seconds

So that;

diffusion rate =

                      = 0.0019643 /s

Diffusion rate is 1.96 × /s

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

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