Question

A purified cytochrome protein was found to contain 0.376 % iron. What is the minimum molecular mass of the protein?
A. `14,800 u`
B. `1480 u`
C. `148,000 u`
D. `148 u`

Answer 1

Correct Answer - A
Mass of iron (minor component) per gram of protien `=(0.376)/(100)=0.00376g`
Atomic mass of iron = 56 u
Minimum molecular mass
`=("Atomic mass of Fe")/("Mass of Fe per gram of macromolecule")`
`(56)/(0.00376)=14,800 u`