Scientists are studying the structure and function of receptor x, a single-polypeptide protein that is found in the membrane around certain types of cells. receptor x contains no alpha-helices or beta sheets. a specific molecule outside the cells is recognized and bound by receptor x. the binding of the molecule to receptor x causes the cells to have a particular response. identify the process used to form the covalent peptide bonds that join amino acids into a polypeptide

This protein doesn't have a secondary structure (i.e., alpha helices or beta sheets), thereby it interacts with the specific molecule trough its loops

Explanation:

Protein loops may interact with diverse molecules including nucleic acids (RNA and DNA), proteins, signal molecules, etc. These protein sequences (loops) interact with both polar and non-polar head groups

The process used to form the covalent peptide bonds joining amino acids into polypeptide is :  Condensation reaction

Although your question is incomplete attached below is the missing data related to your question.

Covalent Peptide bonds are bonds formed between the carboxyl group of a molecule reacting with the amino group of a different molecule producing water molecule as part of its product. and this process is known as dehydration synthesis mechanism  ( aka Condensation reaction )

Hence the process used to form the covalent peptide bonds joining amino acids into a polypeptide is Condensation reaction

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