The objective is to

  • identify the components of DNA.
  • describe how information for specifying the traits of an organism is carried in the DNA
  • recognize that components that make up the genetic code are common to all organisms. 

DNA is the basic building block of life. It is composed of repeating subunits called nucleotides. Each nucleotide is made up of a phosphate, a 5-carbon sugar and a nitrogenous base. There are 4 nitrogenous bases found in DNA, Adenine, Thymine, Guanine, and Cytosine. Adenine can only pair up with Thymine and Guanine can only pair up with Cytosine. How these 4 bases are arranged determines everything about you. Every living thing on earth has the same 4 nitrogenous bases. DNA Replication is the process in which DNA is copied. It is unzipped by DNA Helicase, and DNA polyermase comes in and reads the ordinal strand and then attaches free nitrogenous bases to its complimentary base pair, resulting in 2 identical strand of DNA at the completion of DNA Replication 

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Video over the basics of DNA and DNA Replication.

Source: I created using PPT and screencast-o-matic.com