Remember…DNA replication… Replication – makes an exact copy of the genetic material for all new cells Semiconservative Model (part old/part new)

Bellwork: Draw the graph and answer the question The graph shows the rate of activity for the enzyme catalase at different temperatures. Catalase helps convert hydrogen peroxide to oxygen and water. The rate of catalase activity is directly related to the percent increase in oxygen. Based on the graph, what conclusions can be made about the functioning of catalase?

Science Fact of the Day: An Octopus has three hearts.

From DNA to Protein From DNA to Protein Write 2 questions you have from the video as you watch.

Central Dogma DNAmRNAProtein Translation Transcription Nucleus Ribosome Only dealing with this part today!

1) DNA has instructions for the rest of the cell 2) DNA gets transferred into mRNA (messenger RNA) 3) mRNA leaves nucleus, crosses cytoplasm, and attaches to a ribosome Transcription

Transcription Preview

DNA & RNA Differences: 1) RNA has ribose instead of deoxyribose 2) RNA is single stranded RNA 3) RNA has uracil instead of thymine

Add this to your notes!! DNA to DNA C  G G  C T  A A  T DNA to RNA C  G G  C T  A A  U

DNA/RNA match up!!!!

What’s the point? Gene expression: genetic information is turned into a useful product, one section at a time Think of it like this: DNA = master blueprints, recipe book mRNA = partial instructions (you don’t need blueprints for the whole house to put in the foundation), one recipe

Big Ideas first step in making a protein (polypeptide) occurs in the nucleus DNA makes mRNA – mRNA is sent out of the nucleus – one gene (a small section of the DNA strand) that codes for one protein at a time

Practice Replication and Transcription We’re going to make a “Protein Synthesis Tri-fold” Follow my directions, step by step Use your understanding of Transcription to complete the worksheet you picked up at the beginning of class. It’s due tomorrow.