Which of the following element is not usually present in all proteins?
Correct answer: D. Sulfur
- A. Carbon
- B. Hydrogen
- C. Nitrogen
- D. Sulfur
Explanation
Proteins are macromolecules composed of amino acids, which are linked together by peptide bonds. While carbon, hydrogen, nitrogen, and oxygen are consistently found in all proteins, sulfur is not universally present in all proteins. The presence of sulfur in proteins is dependent on the specific amino acid composition.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Classification of Proteins
Proteins are classified by composition as simple, conjugated and derived proteins, and by shape as fibrous or globular proteins. The topic relates these classes to examples such as albumin, keratin, collagen, haemoglobin and casein, while distinguishing structural proteins from proteins with transport, catalytic or regulatory roles.
Practise Macromolecules
299 free Macromolecules MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Classification of Proteins questions
Peptides are intermediate in the formation of_
What are the distinguishing features of fibrous proteins?
Left handed helix in protein secondary structure is called as_?
Globulin proteins are found in:
Protein part attached with the non-protein part in enzymes belongs to which class of proteins?
In conjugated protein molecules, the protein is attached or conjugated to some non-protein group which are called: