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Station 7

Reporting Category 2 Mechanisms of Genetics. Station 7. Components of DNA. Essential Question- Bell Ringer. How does the structure of DNA make it possible for traits to be passed on from one generation to another?.

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Station 7

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  1. Reporting Category 2 Mechanisms of Genetics Station 7 Components of DNA

  2. Essential Question- Bell Ringer How does the structure of DNA make it possible for traits to be passed on from one generation to another? The nucleotide bases that are paired on a DNA strand are complementary to each other. When the DNA molecule unzips and unwinds during DNA synthesis, the exposed strand of bases serves as a template for a new duplicate. The duplicate strand, when bonded to the old strand, makes a precise copy of the original DNA molecule.

  3. Pre- Review Question What makes up the backbone of a DNA molecule? Phosphate group and deoxyribose sugar

  4. What are the four bases of the DNA molecule? Adenine, Thymine, Guanine And Cytosine

  5. What holds a DNA molecule Together? Weak hydrogen bonds

  6. Lab Activities You will now go to the lab and complete the activities for today’s topic.

  7. Station 7. I need to remember……… • DNA molecules contain four nitrogenous bases: adenine, guanine, cytosine, and thymine. • Two bases—adenine and guanine—are called purines. • Two bases—thymine and cytosine—are called pyrimidines. • Genes are pieces of DNA that pass traits to offspring. • Nucleotides are made up of a sugar, a phosphate group, a base, held together by hydrogen bonds. • The amounts of adenine and thymine found in DNA are equal. • DNA molecules are made up of a double helix containing two strands. • Weak hydrogen bonds hold the DNA molecule together. • DNA is found in all living organisms. • DNA stands for deoxyribonucleic acid. • DNA is referred to as the “blueprint of life” because it contains all the information in a living organism.

  8. Post Review Questions • Can you find the nitrogen base Uracil in a • DNA molecule? No 2. What does Adenine pair with? Thymine 3. How many strands does a DNA molecule have? 2

  9. Post Review Questions 4. What is the shape of the DNA molecule called? Double helix 5. List the 3 parts of a nucleotide Sugar, phosphate group, and nitrogen base

  10. Take 5 Minutes to draw a DNA molecule using the correct shape of the sugar and include all 4 nitrogen bases.

  11. DNA molecule

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