Replication of DNA.

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Presentation transcript:

Replication of DNA

Before a cell divides it must duplicate its DNA, so that the new cell will have a complete set of DNA. Each strand of DNA serves as a template against which a new strand is made. video

The copying process is called “Replication” and is carried out by a series of enzymes. The enzymes unzip the DNA strands, insert appropriate bases, and produce sugar-phosphate links to extend the growing DNA.

The unzipping breaks the hydrogen bonds between bases, allowing new hydrogen bonds to form.

RNA Ribonucleic Acid

Acts as a messenger between DNA and the ribosomes Carries out process by which proteins are made from amino acids Founds as three forms which you will learn about in Biology 12: mRNA (messenger), tRNA (transfer), rRNA (ribosomal)

RNA structures 5 carbon sugar (ribose) Phosphate Nitrogenous base: i. Adenosine ii. Cytosine iii. Guanine iv. URACIL

Difference between RNA and DNA Some Bodies Have Sexy Legs deoxyribose ribose sugar bases thymine uracil helix yes no strands 1 2 throughout cell location nucleus

Homework!!! Review 7.2 #1-4

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