Chlorophyll $a$ is found in

Which of the following is a $Cu^{++}$ containing protein complex?

Energy transfer in photosynthesis occurs as:

Analogy type question:
$(1)$ Chlorophyll-$a$ : Blue-green color :: Chlorophyll-$b$ : .......
$(2)$ Chlorophyll-$a$ molecule in $PS-I$ : Absorption of $700 \,nm$ wavelength :: In $PS-II$ : .......

Which of the following compounds lacks iron?

In a chlorophyll $a$ molecule,which of the following groups is attached to carbon atom $3$ of pyrrole ring $II$?