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BIOLOGY QUIZ CHAPTER 12 12-3-12-5 Answer the following questions on a separate sheet of paper. 1. What are the three types of RNA? 2. What are the three differences between DNA and RNA 3. What is a Codon? 4. If there are 64 possible codons and only 20 amino acids what has to be true? 5. Why does mRNA have to carry DNA’s message to the Ribosomes? 6. What two things are attached to tRNA? 7. Where in the cell does transcription occur? 8. Where in the cell does translation occur? 9. What are three possible ways a DNA mutation could occur? 10. Why is a frameshift mutation usually lethal? 11. Choose two of the four chromosomal mutation types and using letters name and sketch and example of each. 12. What is an Operon? 13. What is the job of the Promoter? 14. Using a sketch show how the Operator in the Lactose Operon is affected by high and low concentrations of lactose. 15. What is a TATA box? 16. What are hox genes?