Chs. 11 and 12 Clicker Quiz!

Get your clickers ready! 8 questions.

1. A codon is:

1 2 3

70%

28%

2%

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.

2. Which is true about DNA and protein?

1 2 3

12%

67%

21%

1. DNA contains protein.

2. DNA turns into protein during transcription and translation.

3. DNA contains coded instructions for making a protein.

3. Ervin Chargaff, creator of Chargaff’s rule, discovered that:

1 2 3 4

12%

0%

26%

62%

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.

4. A gene in DNA needs to be transcribed. Which enzyme will do the

job?

1 2 3 4

53%

8%

27%

12%

1. DNA polymerase2. Helicase3. RNA polymerase4. Ligase

5. When DNA is transcribed, an A in DNA will be matched by a ___ in mRNA.

1 2 3 4 5

0%6%

94%

0%0%

1. A2. T3. C4. G5. U

6. What is the ribosome’s job?

1 2 3

16%

6%

78%1. Transcribes DNA into mRNA.

2. Reads mRNA and creates a protein.

3. Balances all genes and proteins in the cell.

7. One way that RNA is different from DNA is:

1 2 3

67%

31%

2%

1. RNA is a single strand.

2. RNA contains thymine.

3. RNA has no sugar-phosphate backbone.

8. When does a cell replicate its DNA?

1 2 3 4

15% 13%

65%

8%

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.