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

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