Question

Haemoglobin is

• A. an enzyme
• B. a globular protein
• C. a vitamin
• D. a carbohydrate

Answer 1

The Correct Option is B

To solve the problem, we need to identify what haemoglobin is among the given options. Let's analyze each option:

1. **An enzyme**: Enzymes are biological catalysts that speed up chemical reactions in living organisms. They are typically proteins but specialized in function. Haemoglobin does not function as a catalyst in biological processes.
2. **A globular protein**: Haemoglobin is a type of protein that is primarily responsible for the transport of oxygen in the blood. It has a globular, or spherical, structure, which allows it to carry oxygen molecules efficiently. This option aligns with the known function and structure of haemoglobin.
3. **A vitamin**: Vitamins are organic molecules that are essential for normal metabolism but are not synthesized by the body. Haemoglobin does not fit this definition, as it is a protein and not a vitamin.
4. **A carbohydrate**: Carbohydrates are macromolecules consisting of carbon, hydrogen, and oxygen, usually in the form of sugars or starches. Haemoglobin does not have the chemical structure of a carbohydrate.

Based on the analysis, the correct answer is that haemoglobin is a globular protein. This is supported by its structure, function, and the role it plays in oxygen transport in the blood.

Thus, the correct answer is a globular protein.