Chlorophyll molecule resembles the haem group of hemoglobin, the main difference between these two molecules is that chlorophyll has _ ion.
Correct answer: B. Mg2+
- A. Fe2+
- B. Mg2+
- C. Mn2+
- D. Ca2+
Explanation
The chlorophyll molecule consists of a central magnesium atom surrounded by a nitrogen- containing structure called a porphyrin ring; attached to the ring may be a long carbon- hydrogen side chain, referred to as a phytol chain. The heme consists of a flat organic ring surrounding an iron atom.
This question appeared on the NUMS 2017 paper, which you can sit online with every answer explained.
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About Conjugated Molecules
Conjugated molecules contain a non-protein component attached to a protein portion, giving the molecule properties that a simple protein lacks. The content includes glycoproteins, lipoproteins, phosphoproteins, nucleoproteins, chromoproteins and metalloproteins, with attention to their prosthetic groups and roles in transport, protection, catalysis and cellular structure.
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