RNA loop configuration?

[SStell]

In tRNA, rRNA, and ribozymes there are stretches of RNA that are bonded to compliments by hydrogen bonds and form helixes. There are also loops. Do the bases that form the loops have their hydrogen bonding regions facing outwards? I have attached a file to illustrate my question. Does the RNA naturally twist so that the bonding region is pointing outward?

Edited July 25, 2016 by SStell

[CharonY]

Take a look at the moiety responsible for the hydrogen bonds. Now think about whether they are hydrophobic or hydrophilic.

[SStell]

thanks

[BabcockHall]

One wonders how the hydrogen bonding of the bases is satisfied.