Problem:

Question 1: How do van der waals and hydrophobic interactions affect the structure of double stranded RNA?

Question 2: In Rh disease of the newborn, maternal antibodies enter fetal circulation and destroy the red blood cells of the fetus. A mother with type O blood has anti-A and anti-B antibodies, but may have a dozen type A children without any problem at all. Explain why.

Any help would be greatly appreciated!