Question

Which of the following is an example of chromoproteins?

• A. Ribosomes
• B. Mucin
• C. Carotenoids
• D. Haemoglobin

Answer 1

The correct option is C Carotenoids

Conjugated proteins contain a protein part along with a non protein part (prosthetic group). They can be classified as follows. Phosphoproteins contain a protein and a phosphate part. Eg:- casein found in milk. Glycoproteins contain proteins and carbohydrates. Eg:- Mucin found in saliva which helps in lubricating the food. Nucleoproteins contain proteins and nucleic acids. Eg:- Ribosomes, where proteins are linked to nucleic acids. Lipoproteins contain proteins and lipids. Eg:- high density lipoproteins found in blood. Chromoproteins contain proteins and pigments. Eg:- Carotenoids. Metalloproteins contain proteins with metals. Eg:- haemoglobin contains iron.