ESTIMATED TIME TO COMPLETE: 90 minutes
MODULE OBJECTIVES:
Components | Student Grouping |
Materials / Technology | |
Engagement | DNA is like a twisting ladder...(Rensberger, Life Itself, 1996) Graphic Organizer constructed using Inspiration Read a portion of an interview with Francis Crick (web-whacked from www.accessexcellence.com) |
Class | Rope ladder and graphic organizer |
Exploration | Guided Inquiry- How can we extract DNA from the nucleus of a cell? Students will hypothesize about which ingredient (detergent, meat tenderizer, alcohol) to use and why. Students will outline and implement laboratory protocol.DNA Exploration- Explore the cells of the hand to identify where DNA is located (The Tech Museum). | Groups | Detergent Meat Tenderizer Alcohol Internet Access |
Explanation | Class Discussion- Who was able to successfully extract DNA from a cell? What protocol did you use and why? What does the extract DNA look like? What did the DNA from the hand cells look like under an electron microscope? | Class | |
Extension | Building DNA - Students will build a DNA molecule by manipulating nucleotides (GSLC). Students will print out their molecule of DNA along with the answers to the complementary questions. | Individual | Internet Access |
Evaluation | DNA Extraction- Students will justify why and when they used ingredients to separate DNA from the nucleus of an organism. Lab protocol will be submitted with extracted DNA.Building DNA- Each group of students will receive a smaller version of a rope ladder. Students will convert rope ladder into a model of DNA by attaching sugars, phosphates, and bases. | Groups | Rope ladders Colored paper Glue |
EXPECTED MODULE OUTCOMES: