Chapter 15 Questions - Biology I: Cellular Biology and Genetics | BIOL 201, Quizzes of Biology

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Biology, 10e

Raven, Johnson, Mason, Losos, Singer

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 15

Questions

The central dogma of molecular biology states that information flows from— a. DNA to RNA to proteins b. Proteins to RNA to DNA c. RNA to DNA to proteins d. DNA to proteins to RNA e. RNA to proteins to DNA

Promoters and terminators are found— a. On the template strand b. On the mRNA c. At the ends of a polypeptide d. On the tRNA e. On the coding strands

Translation occurs when— a. Information on the RNA directs amino acid synthesis b. Peptide bonds are formed c. RNA is modified in the nucleus d. The RNA polymerase assembles the protein e. DNA polymerase III copies DNA into RNA

What is the function of the 5´ cap and the 3´ poly-A- tail? a. Initiates transcription b. Forms bonds between amino acids c. Protects mRNA from degradation d. Splices out the intron sequences e. Acts as a stop codon in some polypeptides

Aminoacyl-tRNA synthetases— a. Bind the correct amino acid to the empty tRNA b. Bind the tRNA to the anticodon c. Bind the amino acids together d. Bind the tRNA to the mRNA e. Cut and assemble the tRNA molecule

Empty tRNA molecules leave the ribosome at the a. P-site b. E-site c. A-site d. T-site e. X-site

Where does transcription take place? a. In the nucleus b. In the nucleolus c. In the cytoplasm d. On the ribosome e. On the rough ER

The start codon (AUG) also codes for methionine. How does this affect the protein? a. All proteins start with AUG b. AUG signals the beginning and the end of the protein c. The DNA code for the protein starts with AUG d. All proteins begin with methionine e. All mRNA strands start with methionine

All stop codons code for proline. Proteins, therefore, begin with methionine and end with proline. a. This is True b. This is False

The codon AUG matches with the anticodon a. AUG b. TAC c. CAT d. UAC e. GTU

When a substitution mutation changes the codon CCC to the codon CCA, both code for proline. What type of mutation is this? a. Missense mutation b. Nonsense mutation c. Frameshift mutation d. Transposition mutation e. Silent mutation

Where does translation take place? a. In the rough ER lumen b. In the cytoplasm c. On a ribosome d. In prokaryotic cells e. All of the above

Answer Key – Chapter 15

1. A

2. B (False)
3. A
4. B
5. E
6. C
7. A
8. B (False)
9. B
10. A
    11. B (False)
    12. D
    13. B (False)
    14. B
    15. D
    16. E
    17. D
    18. E