DNA Replication Section 12-2

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DNA ReplicationSection 12-2

• Objectives
• 8.0 Identify the structure and function of DNA,
  RNA, and protein.
• 8.1 Explaining relationships among DNA, genes,
  and chromosomes

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DNA Nitrogenous Bases

• Adenine
• Thymine
• Cytosine
• Guanine
• The base pairings
• Adenine and Thymine
• Cytosine and Guanine

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DNA Replication

• Occurs in S (synthesis) phase of Interphase
• As the double helix separates into 2 strands, the
  hydrogen bonds holding together the nucleotide
  bases break.
• Each strand has a new complement strand formed
• Each Adenine connects with a new Thymine.
• Each Cytosine connects with a new Guanine.
• AND VICE VERSA!!!!

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The Purpose of Replication

• Replication occurs prior to cell division, so
  that new cells can form with complete sets of
  DNA.
• Practice
• Write out a 24-base nucleotide sequence. (You
  MUST Use Color!!!!)
• Exchange sequences with someone.
• Write out the complement strand for your
  partners sequence.
• What have you just created? ?

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Build a DNA Molecule Online Activity

• http//learn.genetics.utah.edu/content/begin/dna/b
  uilddna/

Diagrams source http//karimedalla.wordpress.com/
2012/11/01/3-3-7-1-dna-structure/