Question

Chlorophyll 'a' molecule at its carbon atom 3 of the pyrole ring II has one of the following

• A. Aldehyde group
• B. Methyl group
• C. Carboxylic group
• D. Magnesium

Answer 1

The correct option is B Methyl group

$C_{55}{H}_{72}{O}_5{N}_{4}Mg$ is the formula of chlorophyll a which contains chlorin ring in which Mg is surrounded by four nitrogen atoms which are attached by several hydrocarbons and its long chain. The hydrocarbon chain is long and hydrophobic and helps to attach with other hydrophobic protein in the thalamus. The $C{H}_3$ is the methyl group attached to the pyrrole ring II.

So the correct option "Methyl group".