#1: Why is deoxyribonucleic acid (DNA) called the blueprint of life? the answer is D: it contains the genetic material for living things on earth.
#2: RNA transports genetic information, so I'm 98% sure it would be B
#3: The sequence of DNA is important because if the proteins were lined up incorrectly it would cause a genetic mutation, which can be bad. So I think it would be B.