ANSWER KEY CHAPTER 5.1 QUIZ 1. GGG ACA TGA TTC Which sequence of mRNA bases is the correct transcription of the DNA sequence represented above? a. CCC TGT ACT AAG b. CCC UGU ACU AAG c. CCC TGT ACT UUG d. CCC UGU UCU UUG Correct Sequence: GGG ACA TGA TTC Mutated Sequence: GGG ACA TGA TCC 2. Identify the mutation represented by the sequences above. a. Substitution c. Frameshift b. Deletion d. Insertion CCU AAA AGU GCA 3. Which series of amino acids is the correct translation of the mRNA molecule represented above? a. glycine, lysine, serine, histidine b. proline, serine, tryptophan, asparagine c. proline, lysine, asparatic acid, threonine d. proline, lysine, serine, alanine CGG CAA TTT AAC 4. Translate the DNA strand above to determine the correct order of amino acids. a. arginine, glutamine, phenylalanine, asparagine b. alanine, valine, lysine, leucine c. alanine, valine, lysine, lysine d. arginine, glutamine, asparagine 5. Why don’t certain mutations affect the amino acid sequence in protein synthesis? a. The amino acids are so close in structure, it doesn’t matter. b. There are multiple amino acids for each codon combination. c. Each amino acid has multiple codon combinations.
ANSWER KEY 6. A gene represented by the DNA strand AGA CCA AAT GGG undergoes a mutation. Which mutated strand has the greatest affect on a person’s health? a. AGA CCA AAT GGG c. AGA CTA AAT GGG b. AGA CCT AAT GGG d. AGA CCC AAT GGG Match the following description with the nucleic acid that has that description: A. DNA 7. 8. 9. 10. 11. 12. 13.
B. RNA
Has a single strand. B Has a double strand. A Has ribose sugar in the backbone. B Has deoxyribose sugar in the backbone. A Has the nitrogen base thymine. A Has the nitrogen base uracil B Found in the nucleus only. A
Match the following description with the process that has that description. A. Replication 14. 15. 16.
B. Transcription
C. Translation
Messenger RNA is produced. B An exact copy of DNA is formed. A Amino acids are brought together. C
Match the numbers in the diagram to the molecule they are referring to. A. B. C. D. 17. 18. 19. 20.
mRNA tRNA amino acid protein #1 #2 #3 #4
C D B A
