Question

Haemoglobin and chlorophyll contain ________respectively.
A) Fe, Co
B) Fe, Mn
C) Mg, Fe
D) Fe, Mg

Answer 1

Haemoglobin is a protein that helps to transport the oxygen from the lungs to the tissues.
Haemoglobin is present in red blood cells. Chlorophyll is a green colour plant pigment that plays an important role in photosynthesis.

Complete answer:

Haemoglobin is a protein present in red blood cells. An essential metal, iron (Fe), is present in haemoglobin. Haemoglobin is made of heme and globin groups. Each haemoglobin molecule contains four heme groups that are surrounded by globin groups. The red colour of the blood is due to the presence of iron in the heme group. Haemoglobin present in red blood cells helps them to bind with oxygen in the lungs. Thus haemoglobin helps to transport the oxygen from lungs to tissues and also helps to carry the carbon dioxide from tissues to lungs.
Thus, haemoglobin contains Fe.
A green colour pigment present in plants, algae and cyanobacteria is known as chlorophyll. The green colour of plants is due to the presence of chlorophyll pigment. Chlorophyll pigment plays a very important role in photosynthesis. Photosynthesis is a process where plants, algae and cyanobacteria produced food using light energy. In this process, there is a conversion of light energy into chemical energy. Each chlorophyll molecule contains a central magnesium atom Mg atom surrounded by a porphyrin ring. Magnesium metal present in chlorophyll absorbs light energy during the photosynthesis process.
Thus, chlorophyll contains Mg.
So, haemoglobin and chlorophyll contain Fe, Mg respectively.

Hence, the correct option is (D).

Note: Iron present in haemoglobin gives a red colour to blood and helps red blood cells to transfer the oxygen. A green colour chlorophyll pigment contains Mg metal. It helps plants, algae and cyanobacteria to produce food by photosynthesis.