1) If a lipid raft is typically 70 nm in diameter and each lipid molecule has a diameter of 0.5 nm, about how many lipid molecules would there be in a lipid raft composed entirely of lipid?
2) At a ratio of 50 lipid molecules per protein molecule (50%protein by mass)how many proteins would be in a typical raft? (Neglect the loss of lipid from the raft that would be required to accommodate the protein.)

A. 19,000 lipid molecules, and 380 proteins.
B. 38, 000 lipid molecules and 760 proteins.
C. 9,500 lipid molecules, and 190 proteins.
D. 72,000 lipid molecules, and 1520 proteins.

15,393 lipid molecules

19,000 lipid molecules and the number of protein 308 molecules.

Explanation:

Diameter of the lipid raft is equal to 70nm

Diameter of a lipid molecule is equal to 0.5

Means, the diameter of the lipid raft 140 lipid molecules.

Area is equal to Area of a circle = pi r^2

The radius is 70 lipid molecules (140/2).

Area= 3.142×70^2,

=~15,393 lipid molecules which is approximatel

Ratio of lipid molecules to protein molecule=50:1

the number of protein molecules is 15393/50 = 308 protein molecules

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