The average molecular weight of an amino acid in a protein (without water) is 11

Question

The average molecular weight of an amino acid in a protein (without water) is 110. Using this average molecular weight, approximately how many amino acids make up the protein actin, which is an abundant cytoskeletal protein, with a molecular weight of 41,785. (Round to the nearest whole number.)

The average molecular weight of an amino acid in a protein (without water) is 110. Using this average molecular weight, approximately how many amino acids make up the protein actin, which is an abundant cytoskeletal protein, with a molecular weight of 41,785. (Round to the nearest whole number.)

Explanation / Answer

Number of amino acids in a protein can be calculated by dividing molar mass of protein by average molar mass of an amino acid.

Given molar mass of protein:-41785

Average molar mass of amino acid:- 110

Number of amino acid:- 41785/110= 380

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