^ m d. In the document, Nursing: Scope and Standards of Practice, scope of practice is defined by the âwho,â âwhat,â âwhere,â âwhen,â âwhy,â and âhowâ of nursing practice, including advanced practice nursing. In addition, there are other documents relevant to specialties.
double helix. double helix. double helix. The coiled structure of double-stranded DNA in which strands linked by hydrogen bonds form a spiral configuration, with the two strands oriented in opposite directions.
Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladderâs rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.