Kate, you seem to be undergoing wild fluxations of belief and resistence. It is a tough time, I remember it well. At least you are quick to accept the evidence and change your mind, I took a long time.
Perhaps before you answer, research first. Junk DNA is a hot potato for believers, they assume we mean it is a bad design and disproves god. But thats like saying we go hunting fir evidence that there is no unicorns, it makes no sense. It is the religious who are sensitive to such information and evidence, it is not an atheist agenda'd attack.
Besides all of this junk dna is a poor use of terminology, but that is it's name and it is largely junk and unusable. Read up on it yourself. The only reason it can become uselful in the sense of evolutionary adaptation is via random chance that the junk dna hides a useful mutation within it...by chance.
It is clear you don't want to let go of a concept of god, but there is no short cut to research and study if you are really going to assign him a role in our universe. Right now, a perfect designer with a perfect universe has long ago been dismissed..... he would have to be a bumbling fool to have created all of this. I remember when I didn't comprehend such a perspective, there is no way to not sound elitist or superior, but I really don't mean to be. But if humans, the earth, the universe looks perfect to you, there is much to learn as there was with me.
Junk DNA is formed by cells cocking up as they make copies of themselves, it happens millions of times a minute in all living things, defending the use of junk DNA is a losing battle from its very conception, it is made by crappy design. The process of making junk dna is the same that gives us cancer but it also allows for evolution. You can't have benevolence and designer , it is one or the other..... or neither.