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Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
Chapter 9 & 10 notes part 2
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Chapter 9 & 10 notes part 2

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  • 1. CHAPTER 9 & 10 NOTES PART 2 DNA PROCESSES
  • 2. I. REPLICATION <ul><li>The DNA molecule can build an exact copy of itself. </li></ul><ul><li>DNA separates into two strands exposing the bases. The exposed bases combine with free nucleotides. This process is repeated until two whole DNA molecules are formed. </li></ul>
  • 3.  
  • 4. Website <ul><li>This is a website showing the process of replication. </li></ul><ul><li>http:// www.dnai.org/a/index.html </li></ul>
  • 5. II. TRANSCRIPTION <ul><li>The information contained in the DNA must be delivered to the ribosomes where proteins are synthesized (made). </li></ul><ul><li>The information on one strand of DNA is copied almost exactly in a process called transcription . </li></ul><ul><li>This near copy of DNA is called ribonucleic acid – RNA. </li></ul><ul><li>When nitrogen bases do not copy correctly, a mutation happens. </li></ul>
  • 6. What is RNA? <ul><li>RNA differs from DNA in 3 ways: </li></ul><ul><ul><li>1. The sugar in RNA is called ribose . </li></ul></ul><ul><ul><li>2. In RNA, the base uracil replaces thymine. </li></ul></ul><ul><ul><li>3. RNA is a single strand. </li></ul></ul>
  • 7. What are the types of RNA? <ul><li>There are 3 types of RNA: </li></ul><ul><ul><li>1. mRNA (messenger RNA) – acts as a pattern for the order of amino acids in the protein. </li></ul></ul><ul><ul><li>2. tRNA (transfer RNA) – carries amino acids in the cytoplasm to the ribosomes. </li></ul></ul><ul><ul><li>3. rRNA (ribosomal RNA) – found in the ribosomes. </li></ul></ul>
  • 8. Website <ul><li>This is a website showing the process of transcription. </li></ul>
  • 9. III. TRANSLATION <ul><li>The bases on the mRNA act as a code for each amino acid . Groups of 3 bases, called codons , act as a specific code for each amino acid. </li></ul><ul><li>The ribosomes move along the mRNA reading the codons. The tRNA picks up the correct amino acid and brings it to the mRNA . </li></ul><ul><li>A chain of amino acids builds up a protein . </li></ul>
  • 10. Website <ul><li>This is a website showing the process of translation. </li></ul>

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