1) What is the first step in DNA replication a) DNA Unzips b) DNA Untwists c) Nucleotides fill in 2) What is the second step in DNA replication a) DNA Unzips b) DNA Untwists c) Nucleotides fill in 3) What is the third step in DNA replication a) DNA Untwists b) DNA Unzips c) Nucleotides fill in 4) The bonding chemical that holds the DNA backbone together is made out of what? a) Deoxyribose (sugars) b) phosphates c) nitrogen bases 5) The rungs of the ladder are made out of what? a) Deoxyribose (sugars) b) phosphates c) nitrogen bases 6) How do the nitrogen bases pair up? a) Adenine & Cytosine ; Guanine & Thymine b) Adenine & Thymine ; Guanine & Cytosine c) Adenine & Guanine ; Thymine & Cytosine 7) What acts like "chemical glue" and holds the paired nitrogen bases together? a) nitrogen bonds b) phosphate bonds c) hydrogen bonds 8) What stage of the cell cycle will DNA replication occur? a) Interphase b) Prophase c) Telophase 9) What is the name of the DNA structure made out of a sugar phosphate and one nitrogen base? a) Nucleus b) Nucleolus c) Nucleotide 10) A human body (somatic) cell contains 23 paired chromosomes. That's how many chromosomes total? a) 23 b) 46 c) 92 11) The human body cell contains how many chromosomes after DNA replication and before entering Mitosis? a) 23 b) 46 c) 92 12) What are the complimentary nitrogen bases for AACTG a) CCAGT b) TTGAC c) GGTCA

DNA Replication

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