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Name: _____________________ Class: ___________ Date: _________________ DNA Quiz Review 1. Write out the full name for DNA. 2. What is a gene? 3. Where in the cell are chromosomes located? 4. DNA can be found in what organelles in the cell? 5. What two scientists established the structure of DNA? Word Bank deoxyribonucleic acid nucleus Mitochondria and chloroplasts Watson and Crick a segment of DNA 6. What is the shape of DNA? 7. The sides of the DNA ladder are composed of what? 8. The "rungs" of the DNA ladder are made of what? 9. What sugar is found in DNA? In RNA? Word Bank Double helix Deoxyribose & ribose Sugar (deoxyribose) & phosphate Nitrogenous bases 10. How do the bases bond together? A bonds with ____ G bonds with ______ 11. The two purines in DNA are_____ and ____. 12. DNA is made of repeating units called ____. adenine T nucleotides guanine C 13. Why is RNA necessary to act as a messenger? Why can't the code be taken directly from the DNA? 14. Proteins are made where in the cell? 15. How do some cells become brain cells and others become skin cells, when the DNA in ALL the cells is exactly the same? 16. Why is the DNA molecule referred to as the "blueprint of life"? Word Bank DNA is too big to leave the nucleus It tells the cell how to build the organism most genes are turned off On the ribosome in the cytoplasm