Which of the following structural characteristics is not normally observed in a dna duplex?
(a) purine-pyrimidine pairs
(b) external sugar-phosphate backbone
(c) uniform left-handed twist
(d) antiparallel strands

What is the "great pacific garbage patch"? a large area of marine debris concentrated by rotating ocean currents a large area around the pacific rim where debris collects from natural disasters such as tsunamis an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability a large trash dump located in hawaii

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

True or false 5. carrier proteins have the ability to to change shape and physicially move molecules across the cell membrane. 6. in a facilitated diffusion, the concentration of the molecules to be moved across the cell membrane is higher inside the the cell.