A) CHO
B) COOH
C) \[C{{H}_{3}}\] and-CH
D) None of these
Correct Answer: A
Solution :
The molecular formula of chlorophyll\[-a\] and \[b\]are chlorophyll\[\text{-a=}{{\text{C}}_{\text{55}}}{{\text{H}}_{\text{72}}}{{\text{O}}_{\text{5}}}{{\text{N}}_{\text{4}}}\text{Mg}\] chlorophyll\[\text{-b=}{{\text{C}}_{\text{55}}}{{\text{H}}_{\text{70}}}{{\text{O}}_{6}}{{\text{N}}_{\text{4}}}\text{Mg}\] Both of them consist of Mg-porphyrin "head". which is hydrophilic and phytol tail, which is lipophilic. The two chlorophylls differ because in chlorophyll-b there is a-CHO group instead of a-CHa group at the 3rd C-atom in II pyrol ring.
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