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1. The Size of Cells and Th (a) If you were to magnify a cell 10,000-fold (typical of magnification achieved using an electron microscope), ho a yotic cell with a cellular diameter of 50 um. (b) If this cell were a muscle cell (myocyte), how man molecules of actin could it hold? Assume the cell is spherical and no other cellular components are present; actin molecules are spherical, with a diameter of 3.6 nm. (The volume of sphere is Tr.) (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 pre- sent; and the mitochondria are spherical, with a diameter of 1.5 um. a

1. The Size of Cells and Th (a) If you were to magnify a cell 10,000-fold (typical of magnification achieved using an electron microscope), ho a yotic cell with a cellular diameter of 50 um. (b) If this cell were a muscle cell (myocyte), how man molecules of actin could it hold? Assume the cell is spherical and no other cellular components are present; actin molecules are spherical, with a diameter of 3.6 nm. (The volume of sphere is Tr.) (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 pre- sent; and the mitochondria are spherical, with a diameter of 1.5 um. a

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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molecules of actin could it hold? Assume the cell is spherical The Size of Cells and Their Components (a) If you were to magnify a cell 10,000-fold (typica] of u magnification achieved using an electron microscope), ho ples of Bioch 1. yotic cell with a cellular diameter of 50 µm. (b) If this cell were a muscle cell (myocyte), how many and no other cellular components are present; actin molecules are spherical, with a diameter of 3.6 nm. (The volume of a sphere is %ar.) (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 pre- sent; and the mitochondria are spherical, with a diameter of 1.5 µm. h (d) Glucose is the major energy-yielding nutrient for most cells. Assuming a cellular concentration of 1 mM (that is, 1 millimole/L), calculate how many molecules of glucose would be present in our hypothetical (and spherical) eukaryotic cell. (Avogadro's number, the number of molecules in 1 mol of a nonionized substance, is 6.02 X 10.) (e) Hexokinase is an important enzyme in the metabolism of glucose. If the concentration of hexokinase in our eukary- otic cell is 20 uM, how many glucose molecules are present per hexokinase molecule?
Transcribed Image Text:molecules of actin could it hold? Assume the cell is spherical The Size of Cells and Their Components (a) If you were to magnify a cell 10,000-fold (typica] of u magnification achieved using an electron microscope), ho ples of Bioch 1. yotic cell with a cellular diameter of 50 µm. (b) If this cell were a muscle cell (myocyte), how many and no other cellular components are present; actin molecules are spherical, with a diameter of 3.6 nm. (The volume of a sphere is %ar.) (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 pre- sent; and the mitochondria are spherical, with a diameter of 1.5 µm. h (d) Glucose is the major energy-yielding nutrient for most cells. Assuming a cellular concentration of 1 mM (that is, 1 millimole/L), calculate how many molecules of glucose would be present in our hypothetical (and spherical) eukaryotic cell. (Avogadro's number, the number of molecules in 1 mol of a nonionized substance, is 6.02 X 10.) (e) Hexokinase is an important enzyme in the metabolism of glucose. If the concentration of hexokinase in our eukary- otic cell is 20 uM, how many glucose molecules are present per hexokinase molecule?
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