1 In biology, double helix is a term used to describe the structure of DNA. A DNA double helix consists of two spiral chains of deoxyribonucleic acid. The shape is similar to that of spiral staircase. DNA is a nucleic acid composed of nitrogenous bases (adenine, cytosine, guanine and thymine), a five-carbon sugar (deoxyribose), and phosphate molecules.
PA Power & Light (PP&L)------------------------------ 800-342-5775. UGI Utilities, Inc. (Gas)----------------------------------- 717-270-2545. Verizon (telephone)-------------------------------------- 800-483-4600. South Hanover Township Historical Society--- 717-566-8929.
SCHOOL DISTRICT OF BOROUGH OF BRENTWOOD. 3601 Brownsville Road. Brentwood, Pittsburgh, PA 15227-3117. 2017 - 2018 Directory. SCHOOL BOARD (412-881-2227) Name Position E-mail Address. Kircher, Robert F. President, School Board kircherr@bb-sd.com. Gaughan, Roger Vice President, School Board gaughanr@bb-sd.com.