In chlorophyll 'a', the group attached to prophyrine ring is
Correct answer: B. methyl group
- A. hydroxyl group
- B. methyl group
- C. carboxyl group
- D. aldehyde group
Explanation
Chlorophyll 'a' is an essential pigment in photosynthesis, and its structure includes a porphyrin ring. Attached to this porphyrin ring is a methyl group (CH3). This is a distinguishing feature of chlorophyll 'a' as opposed to chlorophyll 'b', which has a formyl group instead. The hydroxyl, carboxyl, and aldehyde groups are not part of chlorophyll 'a's core structure.
This question appeared on the ETEA MDCAT 2011 paper, which you can sit online with every answer explained.
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