You are studying a protein and notice that it contains two regions made of beta-sheets connected by an alpha-helix. This type of recurring structure that can be found in proteins with very different functions is called a:

Motif

Explanation:

Motif (super secondary structures) are similar three dimensional structure conserved in different proteins and perform the similar function. But we cannot predict the function of a protein from the presence of motif because there are several proteins and enzymes that have the same motif but perform different functions.

Structural motif in protein describe the interaction between secondary structures such as helix-turn-helix.

Example; Beta hairpin is an example of motif in which a strong turn of few amino acids connect the two strands

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called