Molecular Genetics Crossword

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Across
  1. 4. For DNA to turn into RNA, _________ must occur.
  2. 7. study of heredity at the molecular level (space is replaced by -)
  3. 8. purine nitrogenous bases have _______ rings in their structure
  4. 9. cytosine,guanine,adenine,uracil are all ________ of RNA
  5. 10. What links nucleotides when they align along the template strand?
Down
  1. 1. the purine nitrogenous bases in DNA and RNA are ________ - ________ (- replaces "and")
  2. 2. instead of containing thymine, RNA contains ________
  3. 3. DNA __________ make the covalent bonds between the nucleotides of a new DNA strand.
  4. 5. ______ mutation: does not change the amino acid codon.
  5. 6. HIV, the AIDS virus: uses its own ________ transcriptase as it is a retrovirus.