Iron in hemoglobin exists as
1). Unionized iron atom
2). Ferric ions only
3). Ferrous ions only
4). Ferric or ferrous ions depending upon the oxygenate state of the heme moiety
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1. Which of the following alkali metals has highest specific heat?
2. Which type of radiations are absorbed by the upper layer of the atmosphere?
3. Which one of the following minerals is found in pure form?
4. Which of the following rays are the most penetrating?
5. Which is not a type of simple machine?
6. Diamond is an allotropic form of:
7. The chiefsource for the production of nitrogeneous fertilizers is :
8. Natural rubber is the polymer of:
9. Helium gas is filled in ballons because
10. When a spoon is to be electroplated with nickel the spoon is