FundamentalsofBiochemistry PS1

FundamentalsofBiochemistry PS1 - CHEM 4511/6501 Problem Set...

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CHEM 4511/6501 Problem Set 1 1. (A) If you were to magnify a cell 10,000-fold (typical of the magnification achieved by using an electron microscope), how big would it appear? Assume you are viewing a “typical” eukaryotic cell with a cellular diameter of 50 μ m. (B) If this cell were a muscle cell (a myocyte), how many molecules of actin could it hold? Assume the cell is spherical and no other cellular components are present. Assume actin molecules are spherical, with a diameter of 3.6 nm. The volume of a sphere is 4/3 π r 3 . (C) If this were a liver cell (hepatocyte) of the same dimensions, how many mitochondria could it hold? Assume the cell is spherical and no other cellular components are present. Assume the mitochondria are spherical with a diameter of 1.5 μ m. (D) Glucose is the major energy-yielding nutrient for most cells. Assuming a cellular concentration of 1 mM, calculate how many molecules of glucose would be present in our hypothetical, spherical, eukaryotic cell. (E) Hexokinase is an important enzyme in the metabolism of glucose.
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FundamentalsofBiochemistry PS1 - CHEM 4511/6501 Problem Set...

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