Science

2. and Guanine
3. Helix two strands of nucleotides wound about each other; structure of dna
7. Replication The process in which DNA makes a duplicate copy of itself
8. Strand The strand in replication that is copied 3' to 5' as Okazaki fragments and then joined up.
9. one strand goes 3' to 5' the other goes 5' to 3
11. Bases with a double-ring structure.
14. Nucleotides that are single ring structures that consist of cytosine and thymine.
16. Strand The new continuous complementary DNA strand synthesized along the template strand in the mandatory 5' to 3' direction.
17. Polymerase Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule
18. Pairs Any of the pairs formed between complimentary bases in the two nucleotide chains of DNA, such as A-T and C-G (DNA)
19. An enzyme that untwists the double helix of DNA at the replication forks

1. Replication in each new DNA double helix, one strand is from the original molecule, and one strand is new
4. Fragments Small fragments of DNA produced on the lagging strand during DNA replication, joined later by DNA ligase to form a complete strand.
5. Backbone The alternating chain of sugar and phosphate to which the DNA and RNA nitrogenous bases are attached
6. An enzyme that joins nucleotides to make the primer.
10. Base A molecule found in DNA and RNA that encodes genetic information in cells.
12. A building block of DNA, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and a phosphate group
13. Ligase enzyme that chemically links DNA fragments together
15. A complex molecule containing the genetic information that makes up the chromosomes