Given data:
Mass of cofactor A in an average yeast cell = 96.15 pg
Now:
1 picogram (pg) = 1*[tex]10^{-12}[/tex] g
1 microgram (ug) = 1*[tex]10^{-6}[/tex] g
Therefore, 1 pg = 1*[tex]10^{-6}[/tex]ug
Mass of cofactor A in one yeast cell = 96.15 * [tex]10^{-6}[/tex] micro gram
Number of cells in the yeast colony = 105
Therefore, the total mass of cofactor A is given as:
Number of cells * mass of cofactor A per cell
= 105 cells * 96.15 *[tex]10^{-6}[/tex] micro grams/cell = 1.009 * [tex]10^{-2}[/tex] micro grams