Q.

An enzyme contains  3.2% by weight of sulphur . Molecular weight of enzyme could be

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a

2500     

b

3600

c

4000

d

4500

answer is C.

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Detailed Solution

GAW   of sulphur = 32g
                              Enzyme                 Sulphur     
                               100g                        3.2g
                                  ‘X’                          32n

NOTE ; one mole of any substance contains a minimum one gm. atom of an element or whole number multiple of it
Molecular mass of enzyme = 1000n
                     (atoms of S)      MW  of enzyme
                       n = 1                  1000 
                      n =2                     2000
                      n = 3                     3000
                      n = 4                     4000
 

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