The ______ refers to a structure with two ends of a single-stranded region (loop) connecting a base-paired region (stem).
A. helical junctions
B. hairpin loop
C. bulge loop
D. interior loop
Answer:B
The ______ refers to a structure with two ends of a single-stranded region (loop) connecting a base-paired region (stem).
A. helical junctions B. hairpin loop C. bulge loop D. interior loop
Explanation: The bulge loop refers to a single stranded region connecting two adjacent base-paired segments so that it “bubbles” out in the middle of a double helix on one side. The multi-branch loop is also called helical junctions.