Question

What would be the no. of protein molecule present in 1.0mg of protein having a molecular weight of 25 kda?

Answer 1

Hey...!!!

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If a protein has a molecular weight of 25 kDa, then one mole of that protein weighs
25 000 g.

The number of molecules in a mole of substance is given by the Avogadro constant,

6.022E23.

So the number of molecules in

1 mg (1E-3 g) is

6.022E23 × 1E-3 / 25 000
= 2.41E16 Ans.

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