1) The twisted ladder shape of DNA: a) enzyme b) double helix c) polymerase 2) A, G, C and ___ are the letters that represent the bases in DNA. a) B b) L c) T 3) How do the nitrogen bases pair up in DNA? a) A and T , C and G b) A and C, T and G c) A and C, C and T 4) The first step of DNA replication: a) The nitrogen bases pair up b) DNA polymerase binds new nitrogen bases c) DNA unzips 5) The name of the enzyme that "unzips" or separates the DNA strand: a) polymerase b) primase c) helicase 6) Which enzyme is responsible for adding new nitrogen bases? a) polymerase b) primase c) helicase 7) In the end, you have two strands of DNA that... a) contain all new nitrogen bases. b) consist of half "old" and half "new" nitrogen bases.

DNA Replication

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