Question

Define turns in science​

Answer 1

Definition. According to one definition, a turn is a structural motif where the Cα atoms of two residues separated by a few (usually 1 to 5) peptide bonds are close (less than 7 Å [0.70 nm]). ... Such hydrogen bonding is the basis for the original, perhaps better known, turn definition.

Answer 2

Hola mate :)

A branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws: the mathematical sciences. systematic knowledge of the physical or material world gained through observation and experimentation.

I hope its help for you:)