Rna occurs primarily as single strands, often giving rise to structures

Ribonucleic acid (RNA) occurs primarily as single strands, often giving rise to single polynucleotide structures.  RNA is a polymeric molecule that is responsible for the regulation, coding, decoding and expression of genes. Each nucleotide has a ribose sugar attached to the carbon, a base that is composed of purines and pyrimidines, a negatively charge phosphate groups and a hydroxyl group which causes helix to mostly adopt the A-form geometry.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.