Intro to DNA Monday 02/13. Goals for Today Be able to name the scientists that helped build our...
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Transcript of Intro to DNA Monday 02/13. Goals for Today Be able to name the scientists that helped build our...
![Page 1: Intro to DNA Monday 02/13. Goals for Today Be able to name the scientists that helped build our knowledge of DNA and be able to describe their contributions.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649e7a5503460f94b7a323/html5/thumbnails/1.jpg)
Intro to DNA
Monday
02/13
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Goals for Today• Be able to name the scientists that helped
build our knowledge of DNA and be able to describe their contributions
• Be able to describe the structure of DNA & list the 3 major components of DNA and what type of bonds hold them together
• Be able to describe how DNA is replicated (how we make more DNA molecules)
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Question of the Day
• What are the 3 major components of a nucleotide?
• Draw one if you can, and label the parts.
• Which piece is variable (changes from nucleotide to nucleotide?
![Page 4: Intro to DNA Monday 02/13. Goals for Today Be able to name the scientists that helped build our knowledge of DNA and be able to describe their contributions.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649e7a5503460f94b7a323/html5/thumbnails/4.jpg)
Question of the Day
• What are the 3 major components of a nucleotide?
• Draw one if you can, and label the parts.
• Which piece is variable (changes from nucleotide to nucleotide?
![Page 5: Intro to DNA Monday 02/13. Goals for Today Be able to name the scientists that helped build our knowledge of DNA and be able to describe their contributions.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649e7a5503460f94b7a323/html5/thumbnails/5.jpg)
DNA Nucleotide – a nucleotide is the three component parts together
PhosphateGroup
NNitrogenous base(A, G, C, or T)
Sugar(deoxyribose)
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Lets Review Nitrogenous bases & pairing• Which are the larger of the bases? What is this
group called?
• Which are the smaller of the bases? What is this group called?
• Which bases pair together? How many bonds between each?
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Ok…….So what is DNA good for?
• DNA has 2 major functions in our body:
1. Make more DNA
2. Make Protein
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Making More DNA…
• DNA replication is the process we use to make more copies of DNA
• When would we need to make more DNA?
• DNA is copied in the “S” phase of interphase to prepare for cell division.
• DNA replication occurs so new daughter cells will have the same information and the same number of chromosomes as the parent cell.
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What has to break for the DNA strand to come apart?
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DNA Replication
DNA replication occurs in 3 basic steps:
1.The enzyme DNA helicase opens the double helix by breaking the hydrogen bonds that link the complementary nitrogen bases between the two strands.
*What two things can enzymes do?
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DNA Replication
2. The Enzyme DNA polymerase move along each of the DNA strands. DNA polymerase adds nucleotides to the exposed nitrogen bases, according to the base-pairing rules.
3. Two DNA molecules form that are identical to the original DNA molecule.
*What do both of these enzymes end in?
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DNA Replication
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Lets see it in real time!
• http://www.youtube.com/watch?v=bee6PWUgPo8
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Now its your turn!• Pyrimidines
• Purines
• Pairing Rules & Bonds
Write in the complimentary bases and connect them with the appropriate number of hydrogen bonds
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Now its your turn! • Pyrimidines
• Purines
• Pairing Rules & Bonds
Write in the complimentary bases and connect them with the appropriate number of hydrogen bonds
![Page 16: Intro to DNA Monday 02/13. Goals for Today Be able to name the scientists that helped build our knowledge of DNA and be able to describe their contributions.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649e7a5503460f94b7a323/html5/thumbnails/16.jpg)
Now its your turn! – Answer Key• Pyrimidines
• Purines
• Pairing Rules & Bonds
Write in the complimentary bases and connect them with the appropriate number of hydrogen bonds
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Rest of the week
• Tomorrow:
2/14: DNA replication Activity
2/15: Quiz on DNA-Scientists & their contribution- DNA structure/composition-DNA replication