Pical ribosomes (diameter 18 nm), which carry cu protein synesis What ge cell vo
ID: 199707 • Letter: P
Question
Pical ribosomes (diameter 18 nm), which carry cu protein synesis What ge cell volume do the ribosomes occupy what is the mass of sing capable of growing and maltiplying mpuly 1539 of the total volume of the some 15,000 percentage of the Homework and Exercises 1. The Size of Cells and Their Components (a) If you were to magnify an electron scope), how big would it appear? Assume you are viewing a "typical" eukaryotic cell with cellular diameter of 50 m. (b) If this cell were a muscle cell (myocyte), how many molecules of actin could it hold? (Assume the cell is spherical and no othe withTdianeterof35nm.The volume ofa sphere is 43 ) (c) If this were a liver cell (hepatocyte) of the same dimensions, how many mitochondria could it hold? (Assume the cell is spherical; no other cellular components are present; and the mitochondria are spherical, with a diameter of 1.5 um) (d) Glucose is the major energy-yielding nutrient for most cells. Assuming a cellular concentration of mM, calculate how many molecules of glucose would be present in our hypothetical (and eukaryotic cell. (Avogadro's number, the number of molecules in I mol of a nonionized (e) Hexokinase is an important enzyme in the metabolism of glucose. If the our eukaryotic cell is 20 M how many glucose molecules are present per hexokinase concentration of hexokinase in herical) substance, is 6.02 x10)Explanation / Answer
to solve your problem, first convert diameters in nM and radius.
for cell = 25000nM
for actin = 1.8nM
put in formulae to find volume (4/3 pie R3)
you would get:
volume of cell = 6.545 x 1013 nM3
volume of actin = 24.42 nM3
divide these values to get the number of actin molecules. it would come out to be approximately
2.68 x 1013 molecules