Unit E cross word

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Across
  1. 2. DNA is a double______ structure
  2. 4. Where polypeptides are located.
  3. 6. One base is left out.
  4. 9. One base is added
  5. 11. Pairs with adenine in RNA.
  6. 12. The building blocks of proteins.
  7. 14. Pieces of separate chromosomes are exchanged.
  8. 15. Proteins are made by ___________.
Down
  1. 1. Found in the red blood cells and carries 4 oxygen molecules throughout the body.
  2. 3. Pieces are replaced with each other.
  3. 5. A segment of DNA that codes for proteins or a trait.
  4. 7. ________ bond.
  5. 8. Start codon
  6. 10. Pairs with thymine.
  7. 13. Nitrogen bases that are NOT involved in the making of protein.