Molecular Genetics Overview Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. During translation protein X, the codon UAA is found on the mRNA. This codon codes for _____.

Question 2 2. What kind of mutation causes sickle-cell anemia?

Question 3 3. A type of point mutation that alters the length of the DNA strand is _____.

Question 4 4. All of the following statements are correct, EXCEPT:

Question 5 5. Which two types of nucleic acids move into the ribosome during translation?

Page 2

Question 6 6. What is the term for a distinct section of DNA that codes for one protein?

Question 7 7. Why are ribosomes important?

Question 8 8. A mutation in DNA can affect the amino acid sequence because it affects the code found in _____.

Question 9 9. The best term to describe the incorporation of a random mistake into the DNA sequence at a specific point is _____.

Question 10 10. What type of molecule is released during the formation of a peptide bond?

Page 3

Question 11 11. What is another term for a chain of amino acids?

Question 12 12. Which of the following is the enzyme that adds RNA nucleotides to build off of the antisense strand?

Question 13 13. How many nucleotide bases make up a codon?

Question 14 14. Why do people try to protect their skin from ultraviolet radiation?

Question 15 15. How do mutagens cause mutations?

Page 4

Question 16 16. The ability of codons to match with the appropriate amino acids is called _____.

Question 17 17. In which step does the polypeptide continue to grow as amino acids are added to the chain?

Question 18 18. Which of the following is the process of transferring genetic information from DNA to RNA?

Question 19 19. Where in the cell does transcription occur?

Question 20 20. In which step does the ribosome reach a stop codon and end the process of translation?

Page 5

Question 21 21. Which enzyme checks DNA for errors?

Question 22 22. Which type of mutation does NOT change the overall function of the protein?

Question 23 23. When can a genetic mutation get passed down through successive generations?

Question 24 24. How many subunits make up the ribosome complex?

Question 25 25.

Use the chart to decode this strand of mRNA:

AUGUCAGAUUGA

Page 6

Question 26 26. _____ mutations result in a longer DNA strand.

Question 27 27. The letters used in the codon chart come from which type of nucleic acid strand?

Question 28 28. Why can we manufacture insulin for humans with bacteria?

Question 29 29. Because the same codons specify the same amino acids in nearly all organisms, we say that the genetic code is _____.

Question 30 30. Which of the following is the process of decoding RNA as instructions for building an amino acid chain?

Molecular Genetics Overview Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Science 101: Intro to Natural Sciences  /  Science Courses
Support