Treasure Box Quest -- Clues

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Across
  1. 2. lower
  2. 3. Where starts with a base ____
  3. 4. A for Adenine
  4. 8. X marks the ____
  5. 10. A _______ cipher
  6. 13. Log __ for pun
  7. 14. Dirk can illuminate us
  8. 16. Keyword for the ___
  9. 17. No better support
  10. 19. treasure
  11. 20. Sugar ____ fairy
Down
  1. 1. sing 329.6 till it _____
  2. 2. Where ends with ____
  3. 5. Knows the keyword
  4. 6. Pay to upgrade?
  5. 7. Pyrimidine cytosine's purine
  6. 9. Great month for the botanical garden
  7. 11. Fun with GPS and ___
  8. 12. Corner
  9. 15. gramana
  10. 18. Easy Peasy _____ Sweezy is wrong
  11. 21. base of this natural