Examine the micrograph of the yeast cells. The scale bar under thephoto is labeled 1 µm. The scale bar works in the same way as ascale on a map, where, for example, 1 inch equals 1 mile. In thiscase the bar represents one thousandth of a millimeter. Using thescale bar as a basic unit, determine the diameter of the matureparent cell and the new cell. Start by measuring the scale bar andthe diameter of each cell. The units you use are irrelevant, butworking in millimeters is convenient. Divide each diameter by thelength of the scale bar and then multiply by the scale bar’s lengthvalue to give you the diameter in micrometers.

You need linear-linear paper and log-linear paper (also called semi-log paper), for linear-linear,10 squares per inch. For log-linear = semi-log you need at least 3 full cycles.   Plot the values below on each type of paper, then select two points marking an approximate doubling of cell density and interpolate back to the ‘x’ axis to determine the time. Indicate the bracketing for your estimate, and state ‘g= ____ hr’     Time (minutes)          OD420                   0                      0.091                          20                     0.092                                         40                    0.111                          60                     0.152                          80                     0.208          100                     0.303          120                     0.430          140                     0.577          160                     0.732         180                      0.902          200                     1.001          220…