From DNA to Proteins

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1 Name: Date: 2/29-3/1/12 Pd: Summary Notes for Chapter 8 Keep this Copy of notes in your binder!! From DNA to Proteins 8.1 Identifying DNA as the Genetic Material Scientist Key Points: What was their most SIGNIFICANT role in identifying DNA as the Genetic Material Griffith Avery Hershey & Chase 8.2 Structure of DNA **Remember: The two forms of nucleic acids are DNA & RNA** Write the full name of DNA here: DNA is a polymer. The monomer for DNA and RNA is a. 1

2 The three parts of a nucleotide are: Label the parts of the nucleotide on the figure below. Complete the figure below by drawing AND labeling 2 covalent bonds. (Refer to pg. 128 in your IR or pg. 233 in your textbook) What are the Five Nitrogen Containing Bases (For both DNA & RNA) List them in the boxes below; include the FULL name and the abbreviation. Pyrimidine Pyrimidine Pyrimidine Purine Purine Hint: Only Found in RNA Watson & Crick identified the shape of DNA as a. **The bases in DNA always pair the same way ** This pattern is known as the rule. 2

3 If the sequence of bases on one strand of DNA is C T G T A the other DNA strand will be G A C G A T. What sequence of bases would pair with the sequence T G A C T A? 8.3 DNA Replication Replication is the process by which is copied during the. What is an enzyme? How does DNA polymerase help to form DNA? **At the end of replication, two identical molecules of DNA are created** Steps of Replication: Existing Molecule Unzipping Nucleotides Added Two DNA molecules formed 3

4 Looking Ahead: Compare and Contrast DNA and RNA here: DNA RNA The Central Dogma States that information flows in one direction, what is it? What are the three types of RNA and what are their functions? RNA Type Function

5 8.4 Transcription What is transcription? Fill in the blanks below for the table that summarizes the Central Dogma Process Location Starting & Ending Products Replication nucleus mrna protein are enzymes that bond nucleotides together in a chain to make a new RNA molecule. Which nucleotide is present in RNA that is not present in DNA? **The bases in RNA always pair the same way ** If the sequence of bases on one strand of DNA is TAC-CGA-ATT the newly TRANSCRIBED mrna strand will be AUG-GCU-UAA *Remember, there is no Thymine (T) in RNA* Transcribe the DNA molecule below, Use strand 1 as the template: DNA Strand 1 TAC-ACG-TTA-CAA-CAA-ACT Strand 2 ATG-TGC-AAT-GTT-GTT-TGA mrna 5

6 8.5 Translation What is translation? mrna Segment AUG CUU A CODON is a sequence of three nucleotides that codes for an amino acid. Circle the 1 st codon on the mrna segment above. Amino Acids are the monomers for the polymer. Which form of RNA is responsible for carrying amino acids? Which form of RNA is responsible for linking amino acidas? Which RNA molecule is the location for the anticodon? *Anticodon is a set of three nucleotides that is complementary to an mrna codon. Complete the figure below by using Figure 8.13 on pg. 244 Amino Acid trna AUG CUU AGU UGA Transcribe the DNA molecule below, Use strand 2 as the template: DNA Strand 1 TAC-ACG-TTA-CAA-CAA-ACT Strand 2 ATG-TGC-AAT-GTT-GTT-TGA mrna Use your mrna strand, to determine the trna anticodons trna 6

7 8.7 Mutations A is a change in the organism s DNA. GENE MUTATIONS What is a point mutation? What is a frameshift mutation? *The two types of frameshift mutations are &. Use the DNA Strand: GAT-CTA-ATT 1. Create a point mutation 2. Create a frameshift mutation-insertion 3. Create a frameshift mutation-deletion CHROMOSOMAL MUTATIONS What occurs to chromosomes in each of the following mutations? 1. Gene duplication 2. Gene Translocation *Mutations in somatic cells are not passed to offspring. Mutations in gametes are passed on to offspring* 7