Question

Mg is a component of

• A. chlorophyll
• B. cytochrome
• C. haemoglobin
• D. haemocyanin

Answer 1

The Correct Option is A

To solve the question, we need to identify which of the given options contains magnesium (Mg) as a component. Let's examine each option:

• Chlorophyll: Chlorophyll is the green pigment found in the chloroplasts of plants and is essential for the process of photosynthesis. The chlorophyll molecule contains a porphyrin ring with a central magnesium ion. This Mg ion plays a crucial role in the absorption of light, which is vital for photosynthesis to occur.
• Cytochrome: Cytochromes are proteins that play key roles in electron transport chains, especially in cellular respiration and photosynthesis. They contain iron (Fe) as part of a heme group, not magnesium.
• Haemoglobin: Haemoglobin is the iron-containing component of red blood cells responsible for oxygen transport in the blood, containing iron (Fe) and not magnesium.
• Haemocyanin: Haemocyanin is an oxygen transport protein found in some invertebrates like mollusks and arthropods. It contains copper (Cu) ions, and not magnesium, as part of its structure.

After evaluating each option, it is clear that the correct answer is chlorophyll, as chlorophyll is the only compound among the given options that contains magnesium as a central atom in its structure.

Therefore, the component of Mg is found in:

Chlorophyll