DNA, RNA and Protein Synthesis Crossword Puzzle

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Across
  1. 5. synthesis of an RNA molecule from a DNA template
  2. 7. a single-stranded nucleic acid that passes along genetic messages
  3. 10. an enzyme that connects two fragments of DNA to make a single fragment
  4. 11. pentose sugars found in nucleic acids
  5. 12. type of RNA that transfers amino acids to ribosomes
  6. 13. the form of RNA that carries instructions for making a protein
  7. 15. type of rna that makes up the major part of ribosomes
  8. 16. an enzyme that untwists the double helix of DNA
  9. 19. bonds that connect the base pairs in DNA
  10. 20. complex molecule containing genetic information
  11. 21. the codon that ends all RNA, UAG, UAA or UGA
Down
  1. 1. transcription-making an RNA copy of part of DNA strand
  2. 2. three nucleotide sequence that codes for a single amino acid
  3. 3. building block of DNA
  4. 4. process by which mRNA is decoded and a protein is produced
  5. 6. small fragments of DNA joined later by ligase to form a complete strand
  6. 8. a change in a gene or chromosome
  7. 9. base that pairs with guanine
  8. 14. the base that pairs with thymine in DNA and uracil in RNA
  9. 17. the nucleotide that bonds with adenine
  10. 18. an enzyme that joins RNA nucleotides to make the primer, which is the starting point