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Properties, structure, and function of biological macromolecules

AP.BIO: SYI‑1 (EU), SYI‑1.B (LO), SYI‑1.B.2 (EK), SYI‑1.C (LO), SYI‑1.C.1 (EK)


The image below depicts how the bacterial protein barnase undergoes modifications that involve changing its conformation, or shape. In order to function in the cell, barnase has to be folded from a nonfunctional conformation into a functional conformation.
Image credit: By Christopher Rowley [CC BY-SA 4.0], from Wikimedia Commons
Based on the information above, which of the following best describes the functional conformation of barnase?
Choose 1 answer: