How many amino acids are constituents of proteins in the human body only?
Correct answer: A. 20
- A. 20
- B. 24
- C. 23
- D. 25
Explanation
Scientists now recognize twenty-two amino acids as the building blocks of proteins: the twenty common ones and two more, selenocysteine and pyrrolysine. Amino acids have several functions. Their primary function is to act as the monomer unit in protein synthesis.
Last updated
About Proteins
Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called__________?
A long polypeptide that is cut up to generate several small proteins is:
A peptide bond is represented by ?
Amino acids are linked together by:
Amino acids mainly differ from each other by the difference in their: