Question

In certain amino acids, which one of the following elements is found in addition to Carbon, Hydrogen, Nitrogen, and Oxygen?

• A. Calcium
• B. Sulphur
• C. Zinc
• D. Phosphorus

Answer 1

The correct option is B

Sulphur

The explanation for the correct option:-

Option (B): Sulphur

• Proteins are composed of molecules called amino acids, in which each amino acid contains four elements: Hydrogen, Oxygen, Nitrogen, and Carbon.
• But in the case of some amino acids, there is the presence of the fifth element, i.e; Sulfur.
• Examples of Sulfur-containing amino acids include: Methionine, Cystine, Cysteine, etc,

The explanation for the incorrect option:-

Option (A): Calcium

• Calcium is not present in amino acids.
• Hence the given option is the incorrect one.

Option (C): Zinc

• There is no zinc present in the elements of amino acids.
• Hence, the given option does not satisfy the correct concept.

Option (D): Phosphorus

• Phosphorous, as an element is not present in amino acids.
• Hence, the given option does not coincide with the correct concept.

Therefore, option (B) is the correct answer.