how can we find the number of amino acids if molecular weight was given?

Answer 1

The conventional approximation is that the average weight for an amino acid is 135 daltons. So you'll get an approximation of how many amino acids the protein has by dividing the MW with 135.

Answer 2

the place in a protein molecule could you come across a hydrophilic amino acid? basic answer: on the exterior, dealing with faraway from maximum different amino acids (hydrophilic factor chains are "water liking" and repelled faraway from the non-polar factor chains of maximum different residues). Why are some amino acids hydrophilic? with the aid of fact the others have stated, it rather is to do with the cost on the factor chain. Polar factor chain (e.g. Ser, Tyr, Asp) = hydrophilic, non-polar factor chain (e.g. Ala, Val, Leu) = hydrophobic. i replaced right into a peptide chemist in a former life... till now I became analytical yet this is yet another tale.

Answer 3

Yes but the molecular weight of a DNA or RNA molecule IS the number of amino acids.

Normally, you migrate your samples on an agarose gel next to a MW marker (it contains sequences of known length) and compare the migration distance of your band to the Molecular weight marker.

Answer 4

by using atomic mass formula