Ask a question

Biology Assitance Needed :)

Hi, I would greatly appreciate if you could full elaborate on the purpose of a single peptide? Thanks in advance!

1 Answer by Expert Tutors

Tutors, sign in to answer this question.
Gavin J. | Patient and Effective Chemistry and Biology TutorPatient and Effective Chemistry and Biol...
5.0 5.0 (10 lesson ratings) (10)
Hi Khloe,
There are four basic ways that scientists characterize protein structure that I think can help you think about the purpose of a polypeptide.
First is the primary structure, which is a basic sequence of amino acids. These amino acids together form a polypeptide. The importance of the primary structure of a protein is that it can be charged, uncharged, polar, nonpolar, and therefore interact uniquely with other proteins. In other words, the peptide begins to determine the structure and function of a protein.
As the amino acids are strung together, they form bonds with each other. The secondary structure of a protein includes these new connections that form structures such as α-helices and ß-sheets. The shape of a protein is referred to as a tertiary structure. This is important for the stability of the protein and its overall function. The quaternary structure of the protein includes multiple polypeptides that are put together to form a protein.