When a 250 ml solution of ethanol in water is prepared with 4 ml of denatured ethanol of 99.6% what will be the concentration of ethanol in % v/v.

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.

the correct answer is b

links? do you have a link? i don't see anything?

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101