Acolleague gives you two tubes containing membrane fractions from an animal cell lysate. one tube contains the plasma membrane fraction, and the other tube contains the mitochondrial inner membrane fraction, but the tubes are not labeled. when you analyze the macromolecule composition of the samples, you are confident that the second tube contains the mitochondrial fraction, because the sample has
a) a higher ratio of cholesterol to phospholipids. b) a higher protein to lipid ratio. c) a lower protein to lipid ratio. d) more carbohydrate in glycoproteins. e) more gpi-anchored proteins.

B) a higher protein to lipid ratio.

Explanation:

The cell membrane of eukaryotes is known to be a phospholipid bilayer with embedded proteins.  This implies that the first tube will contain a higher amount of lipids.

The membrane of the mitochondria is slightly different from the cell membrane in which its protein to lipid ratio is higher, containing a large number of integral proteins.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.