A yeast cell has a volume of

PHYSICS · Multi-part · Fermi University Physics · Biophysics & Medical Physics · Physical foundations of the living cell · Physical foundations of the living cell

Life at Thermal Energy, Ch The scales of life and the thermal energy

Problem

40\,\mathrm{fL}

. A signalling protein inside it is present at a concentration of

250\,\mathrm{nM}

. ((a)) How many copies of the protein does the cell contain? Give your answer to two significant figures. ((b)) A second protein in the same cell sits at

0.020\,\mathrm{nM}

. Find its copy number, and say what that number can and cannot tell you about one cell at one instant.

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