Proteins are used for many structural functions such as in the actin and myosin in muscle or as a part of the cytoskeleton scaffolding that maintains cell shape. what other main function do proteins serve? a. as waterproof membranes to regulate the transport of molecules in and out of the cell b. as cellulose to form the major structural component of plant cell walls c. as enzymes to control the rate of reactions and regulate cellular activity d. as coding for genotypic expression and phenotypic traits reset

C.  As enzymes to control the rate of reactions and regulate cellular activity.

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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.