Across
- 6. The turning off of gene expression
- 8. A nitrogen base that pairs with thymine in DNA
- 12. Cells that have a nucleus and membrane-bound organelles
- 13. Organisms that lack a nucleus
- 14. A DNA segment where a repressor protein binds
- 15. A nitrogen base that pairs with cytosine in DNA
Down
- 1. The process of making mRNA from DNA
- 2. Structures that build proteins
- 3. The basic building block of DNA and RNA
- 4. A cluster of genes regulated together under one promoter
- 5. The turning on of gene expression
- 7. The process of making a protein from mRNA
- 9. The physical traits expressed by an organism
- 10. A three-nucleotide sequence that codes for an amino acid
- 11. The genetic makeup of an organism