Across
- 3. is a kind of virus that infects bacteria
- 6. the bases form the
- 8. DNA consists of two molecules that are arranged into ladder-like structure called
- 10. the principal enzyme involved in DNA replication
- 11. before a cell divides, it duplicates its dna in a copying process called
- 12. In DNA, thymine is complementary to
- 13. pyrimidines have how many rings
- 15. cytonine is complementary to
Down
- 1. the phosphate and the sugar form the
- 2. one type of bacteria had been changed permanently into another.
- 4. a molecule of dna is made up of millions of tiny subunits called
- 5. Purines have how many rings
- 7. the tips of eukararyotic chromosomes are known as
- 9. this nearly perfect fit between A-T and G-C nucleotides
- 14. Short name for deoxyribonucleic acid