Biology

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Across
  1. 5. in each new DNA double helix, one strand is from the original molecule, and one strand is new
  2. 7. A complex molecule containing the genetic information that makes up the chromosomes.
  3. 10. Any of the pairs formed between complimentary bases in the two nucleotide chains of DNA, such as A-T and C-G (DNA)
  4. 11. one strand goes 3' to 5' the other goes 5' to 3
  5. 12. enzyme that chemically links DNA fragments together
  6. 14. The strand in replication that is copied 3' to 5' as Okazaki fragments and then joined up.
  7. 15. Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule
  8. 17. The new continuous complementary DNA strand synthesized along the template strand in the mandatory 5' to 3' direction.
  9. 18. Bases with a double-ring structure. Adenine and Guanine
Down
  1. 1. A building block of DNA, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and a phosphate group.
  2. 2. The process in which DNA makes a duplicate copy of itself.
  3. 3. An enzyme that joins nucleotides to make the primer.
  4. 4. two strands of nucleotides wound about each other; structure of DNA
  5. 6. The alternating chain of sugar and phosphate to which the DNA and RNA nitrogenous bases are attached
  6. 8. Small fragments of DNA produced on the lagging strand during DNA replication, joined later by DNA ligase to form a complete strand.
  7. 9. A molecule found in DNA and RNA that encodes genetic information in cells. (G, C, A, T)
  8. 13. Nucleotides that are single ring structures that consist of cytosine and thymine.
  9. 16. An enzyme that untwists the double helix of DNA at the replication forks.