Which materials are moved by runoff?

Gravity causes the water to flow downhill. As the runoff flows, it may pick up loose material. These materials may include bits of soil and sand. It is carried off by this running water across the surface of the land.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.