Question
Question: Chlorophyll is a naturally occurring chelate compound in which the central metal is A) iron B) c...
Chlorophyll is a naturally occurring chelate compound in which the central metal is
A) iron
B) calcium
C) magnesium,
D) copper
Solution
Chlorophyll is a group of similar green pigments found in cyanobacteria's mesosomes and algae's and plants' chloroplasts. Chlorophyll is required for photosynthesis, which allows plants to absorb light energy.
Complete answer:
Chlorophylls absorb light more effectively in the blue and red portions of the electromagnetic spectrum. Green and near-green wavelengths, on the other hand, are poorly absorbed. Because green light is diffusely reflected by structures like cell walls, chlorophyll-containing tissues look green. Chlorophyll a and b are two kinds of chlorophyll found in green plant photosystems.
Photosynthesis, which allows plants to absorb energy from light, requires chlorophyll. Photosystems are implanted in the thylakoid membranes of chloroplasts, and chlorophyll molecules are organised in and around them. Chlorophyll has three roles in these complexes. The vast bulk of chlorophyll (up to several hundred molecules per photosystem) has the function of light absorption.
Chlorophylls come in a variety of forms, but they always have a fifth ring in addition to the four pyrrole-like rings. Chlorins, which are reduced cousins of porphyrins, are the most common chlorophylls (found in hemoglobin). Porphyrins, including the precursor uroporphyrinogen III, share a biochemical route with them. Unlike hemes, which have iron in the core of their porphyrin-based tetrapyrrole ring, the central magnesium atom in chlorophyll coordinates with chlorine, a partly reduced porphyrin. The chlorin ring can contain a variety of side chains, the most common of which is a lengthy phytol chain. Chlorophyll a is the most extensively distributed type in terrestrial plants.
Hence option C is correct.
Note:
The reaction centre of chlorophyll is responsible for absorbing light energy and transferring it to other components of the photosystem. In a process known as charge separation, the photon's absorbed energy is transferred to an electron. One oxidation process occurs when an electron is removed from chlorophyll. An electron transport chain is formed when chlorophyll contributes a high-energy electron to a sequence of chemical intermediates.