Question

Haemoglobin is a type of

• A. carbohydrate
• B. respiratory pigment
• C. vitamin
• D. skin pigment.

Answer 1

The Correct Option is B

To solve the question "Haemoglobin is a type of," we need to consider what haemoglobin does in the human body.

Step 1: Understanding haemoglobin

Haemoglobin is a protein found in red blood cells. Its main function is to transport oxygen from the lungs to the rest of the body and carry carbon dioxide back to the lungs to be exhaled.

Step 2: Evaluating the options

• Carbohydrate: Carbohydrates are primarily used by the body for energy. Haemoglobin does not fall into this category as it functions mainly in transporting gases.
• Respiratory pigment: This is the correct classification. Respiratory pigments are molecules that increase the capacity of blood to transport oxygen. Haemoglobin is a prime example of this, as it binds with oxygen and greatly enhances its transport in the bloodstream.
• Vitamin: Vitamins are organic compounds that are necessary in small quantities for overall health. Haemoglobin is not considered a vitamin because of its role as a gas transport molecule.
• Skin pigment: Skin pigments are involved in determining skin color, such as melanin. Since haemoglobin is not involved in pigmenting the skin but instead is crucial for respiratory functions, this option is incorrect.

Conclusion: Based on the functions and categories given, haemoglobin is best described as a "respiratory pigment," as it plays an essential role in oxygen transport. Therefore, the correct answer is respiratory pigment.