Youtube video: DNA Structure and Replication: Crash Course Biology #10

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Across
  1. 2. Each of your ___________________ cells has 46 DNA molecules tightly packed into its nucleus.
  2. 5. The enzyme that helps building the beginning of the new DNA strand is called RNA _____________________.
  3. 6. The largest of all our chromosomes contains a single molecule with 247 ____________________ base pairs.
  4. 7. A 5-carbon ______________ molecule that is part of a nucleotide.
  5. 11. Made up of many small, repeating molecular units.
  6. 12. In DNA, the sugars and phosphates bond together to form twin __________.
  7. 13. The order of the four nucleobases, or the Base __________________________ is what allows your DNA to “create” you.
  8. 16. Rosalind ______________________, a young biophysicist in London almost 100 years after DNA was discovered, was likely the first to confirm the helical structure of DNA.
  9. 18. The word that starts with C and is one of the four nitrogen bases.
  10. 20. Deoxyribonucleic acid.
  11. 21. The fourth major group of biological molecules
  12. 22. DNA was discovered in 1869 by a Swiss biologist named Friedrich _________________.
  13. 23. Another name for the DNA molecule and looks like a twisted ladder.
  14. 24. The word that starts with A and is one of the four nitrogen bases.
  15. 25. RNA is a ______________________-stranded molecule, unlike DNA.
Down
  1. 1. The word that starts with T and is one of the four nitrogen bases.
  2. 3. Each contain one DNA molecule.
  3. 4. The small units within DNA.
  4. 5. A ______________ group that is part of a nucleotide.
  5. 8. RNA
  6. 9. The two long chains are linked by the nitrogenous bases via relatively weak ______________________ bonds.
  7. 10. These bonded nitrogenous bases are called _____________ pairs.
  8. 14. The fourth nucleotide in RNA (which replaces thymine).
  9. 15. The sugar in RNA is __________________, which has one more atom than deoxyribose.
  10. 17. The word that starts with G and is one of the four nitrogen bases.
  11. 19. Every cell in your body will copy itself ____________________ of times during the course of your life.