Biology Crossword

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Across
  1. 3. A type of acid used as a building block for proteins
  2. 6. A small section of the DNA chain that has instructions for making a single protein or trait
  3. 7. The complementary base of Thymine
  4. 9. Type of acid that makes DNA
  5. 13. The third and final step in DNA replication, when the double helixes are rebound.
  6. 14. Ribosomes produce these
  7. 16. The organelle that is the control centre of the atom
  8. 17. Chromatin threads condense into these before a cell splits
  9. 18. The organelle that synthesizes (manufactures) proteins
  10. 20. The second step in DNA replication, when new bases (A,C, G, T) are linked in.
Down
  1. 1. Has a single sugar ribose backbone and exposed nucleotides
  2. 2. The name of the double sugar-phosphate backbone of DNA
  3. 4. The messenger that takes the instructions from the DNA in the nucleus to the ribosome
  4. 5. The first step in DNA replication, when the DNA unzips
  5. 8. This is a phosphate, sugar and nitrogenous base
  6. 10. Type of acid that makes RNA
  7. 11. A group of three nucleotides in mRNA which contains the code for a amino acid
  8. 12. The name of the gel like substance in a cell
  9. 15. Many grouped loops of DNA and histones form a long thread cable called...
  10. 19. Replaces Thymine in mRNA