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Name: __________________________________________ Date: _______________ Quiz name: Unit 4 Quiz (Replication/ transcription and translation) (from version 1) 1. DNA is a polymer of A fatty acids B nucleotides C nucleosides D nucleic acids 2. The two polynucleotide chains in DNA are A semidiscontinuous B semiconservative C parrallel D antiparrallel E discontinuous In the Hershey Chase Experiment, DNA was labeled with ____, and bacteriophage protein was labeled with _____ 3. A anticodons, codons B radioactive phosphorous, radioactive sulfur C codons, anticodons D radioactive sulfur, radioactive phosphorous E DNA polymerase, RNA polymerase If a DNA molecule is found to be composed of 40% thymine, what percentage of guanine would be expected 4. A 10% B 20% C 40% D 80% 5. The enzymes that break hydrogen bonds and unwind DNA are A topoisomerases B helicases C polymerases D ligases E primases 6. During replication, what enzyme adds complimentary bases? A topoisomerase B helicase C DNA polymerase D RNA polymerase Page 1 of 4 E 7. primase how many different aminoacids are there? A 3 B 4 C 20 D 64 E an infinite number 8. A stretch of chromosome that codes for a trait can be called a(n): A chromatid B replication fork C gene D base-pair 9. The enzyme that adds nucleotides to the growing RNA strand during transcription is: A helicase B RNA polymerase C DNA polymerase D topoisomerase E primase 10. In RNA, _____ codon(s) translate to ______ amino acid(s) A 1, 1 B 3, 1 C 3, 3 D 1, 3 11. Translation begins: A at the promoter B at the start codon C in the nucleus D on the lagging strand E at the primer 12. A promoter is a: A binding site for DNA Polymerase B binding site for RNA Polymerase C sequence of RNA nucleotides D stop signal for transcription E start signal for translation 13. A codon is a nucleotide triplet in the A rRNA B tRNA Page 2 of 4 C mRNA D DNA template strand E DNA non-template strand 14. The DNA strand replicated in short fragments is called the: A lagging strand B leading strand C either leading or lagging strand During DNA replication, a DNA strand that has the bases 5’-CTAGGT-3’ produces a strand with the bases 15. A 3’-TCGAAC-5’ B 5’-GATCCA-3’ C 3-GATCCA-5’ D 3’-GAUCCA-5’ 16. What is produced during transcription? A RNA molecules B DNA molecules C proteins 17. Which DNA strand(s) will serve as a template during replication? A 3' --> 5' B 5' --> 3' C both D neither E either one 18. Which molecule will bring the aminoacid to the translation site? A rRNA B mRNA C DNA D tRNA 19. Which molecule dictates ultimately the order of the aminoacids in a protein? A tRNA B mRNA C DNA D rRNA 20. Sickle Cell anemia is an example of: A nonsense mutation B missense mutation C silent mutation D frameshift mutation Page 3 of 4 E 21. chromosomal mutation An example of excesive number of trinucleotide repeats is: A Sickle Cell Anemia B Cystic Fibrosis C Down syndrome D Fragile X syndrome Answers 1-b 2-d 3-b 4-a 5-b 6-c 7-c 8-c 9-b 10-a 11-b 12-b 13-c 14-a 15-c 16-a 17-c 18-d 19-c 20-b 21-d Page 4 of 4