1. Chs. 11 and 12 Clicker Quiz! Get your clickers ready! 8 questions.

2. 1. A codon is: 1.A 3-base mRNA sequence that codes for an amino acid. 2.An amino acid. 3.A segment of DNA that codes for a protein.

3. 2. Which is true about DNA and protein? 1.DNA contains protein. 2.DNA turns into protein during transcription and translation. 3.DNA contains coded instructions for making a protein.

4. 3. Ervin Chargaff, creator of Chargaff’s rule, discovered that: 1.DNA is a double helix. 2.There are equal amounts of A and T in DNA. 3.DNA is the hereditary molecule. 4.DNA codes for proteins.

5. 4. A gene in DNA needs to be transcribed. Which enzyme will do the job? 1.DNA polymerase 2.Helicase 3.RNA polymerase 4.Ligase

6. 5. When DNA is transcribed, an A in DNA will be matched by a ___ in mRNA. 1.A 2.T 3.C 4.G 5.U

7. 6. What is the ribosome’s job? 1.Transcribes DNA into mRNA. 2.Reads mRNA and creates a protein. 3.Balances all genes and proteins in the cell.

8. 7. One way that RNA is different from DNA is: 1.RNA is a single strand. 2.RNA contains thymine. 3.RNA has no sugar- phosphate backbone.

9. 8. When does a cell replicate its DNA? 1.Each time it must transcribe a gene. 2.Right after translation. 3.Only when it gets a signal to divide. 4.All the time.