Which of the following elements is NOT part of proteins?

Correct option is B

The correct answer is (b) Iodine.
· Proteins are made up of amino acids, which primarily contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
· While sulfur can be found in certain amino acids (like cysteine and methionine), iodine is not a constituent element of proteins.
· Iodine is an essential element for thyroid hormones but does not play a role in protein structure or composition.
Additional Knowledge:
· Sulphur: Found in specific amino acids, contributing to the three-dimensional structure of proteins.
· Carbon: A key element in amino acids and the backbone of all organic molecules, including proteins.
· Nitrogen: Essential in amino groups (-NH₂) of amino acids, making it a fundamental component of proteins.