No. The physical structure does not allow purines to pair with other purines. Purines can only be paired with Pyrimidines.
amvot..!
Do you mean on a piece of paper? If so, you have to add perspective to it. One way to do that is to draw a background. Another way is to give your object a 3D illusion through techniques such as...
save it
The term is "spitting image" and dates back to 1901. It means an exact likeness or image.