The structure of hemoglobin contains ......... heme groups.
- A$6$
- B$2$
- C$4$
- D$8$
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| Column-$I$ (Type of Amino Acid) | Column-$II$ (Example) |
| $(A)$ Polar and uncharged $R$ group | $(i)$ Methionine |
| $(B)$ Non-polar $R$ group | $(ii)$ Glutamic acid |
| $(C)$ Polar and negatively charged $R$ group | $(iii)$ Lysine |
| $(D)$ Polar and positively charged $R$ group | $(iv)$ Cysteine |
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