A1.2

5. The principle that A always bonds with T and G with C.
7. The type of reaction that forms the sugar-phosphate backbone.
10. Term describing how DNA strands run in opposite directions.
11. The nitrogenous base that pairs with Guanine.
15. The name of the covalent bond linking two nucleotides together.
16. The pentose sugar found in RNA nucleotides.
17. The molecule that links the 3' carbon of one sugar to the 5' carbon of the next.
19. The nitrogenous base found only in RNA.
20. The end of the DNA strand that has a hydroxyl group attached to the sugar.

1. The structural shape of a DNA molecule.
2. DNA has more of this than RNA due to its double-stranded nature and sugar type.
3. The nitrogenous base that pairs with Thymine in DNA.
4. A long chain of repeating monomers, such as a DNA strand.
6. The type of "base" that carries the actual genetic code.
8. The monomer of nucleic acids consisting of a sugar, phosphate, and base.
9. The specific pentose sugar found in DNA nucleotides.
12. The end of the DNA strand that terminates with a phosphate group.
13. The repeating pattern that forms the "rails" of the DNA ladder.
14. The total genetic information of an organism.
18. The type of bond that holds complementary base pairs together.