Question

Which of the following statements is correct with respect to proteins?

• A. The structure of a protein corresponds to its function
• B. Proteins are homopolymers made up of amino acids
• C. All proteins are universally found in all organism
• D. Glycoproteins such as albumin help in immune function

Answer 1

The correct option is A The structure of a protein corresponds to its function

The shape of the protein is determined by the sequence of amino acids present in the polypeptide. The function of a protein is determined by its shape. So, the structure of a protein dictates the functions that the protein will perform. Any change in the structure will directly affect the function of the protein.

Proteins are heteropolymers which are made from different monomers of amino acids. Twenty distinct amino acids combine in different orders in different proteins.

All proteins are not universally found in all organisms. Although the majority of the proteins found in related organisms are similar, unrelated species can have their own unique proteins. For example, hypnotoxin in hydra and hirudin in leeches.

Glycoproteins are conjugated proteins made of carbohydrates and proteins. An important class of glycoprotein called antibodies help in inactivating pathogenic microbes, thereby helping in immune functioning.

Albumin is a simple globular protein, not a glycoprotein. Albumin protein can be found in the blood. It helps in the transport of certain substances (drugs, ions, etc.) and maintenance of osmotic pressure.