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Vocabulary:double helix, DNA, enzyme, mutation, nitrogenous base, nucleoside, nucleotide, replicationPrior Knowledge Questions (Do these BEFORE using the Gizmo.)DNAis an incredible molecule that forms the basis of life on Earth. DNA molecules contain instructions for building every living organism on Earth, from the tiniest bacterium to a massive blue whale. DNA also has the ability to replicate, or make copies of itself. This allows living things to grow and reproduce.1.Look at the DNA molecule shown at right. What does it look like?_____________Looks like a spiral ladder_______________________________This shape is called a double helix.2.Based on this picture, how do you think a DNA molecule makes a copy of itself? (Hint: Look at the bottom two “rungs” of the ladder.) ____I think the ladder splits in half. The horizontal bars disconnect in half and break away from each other________
Gizmo Warm-upThe Building DNA Gizmo allows you to construct a DNA molecule and go through the process ofDNA replication. Examine the components that make up a DNA molecule.