24 Jul WHICH IS THE FAVORED CARBON SOURCE OF E. COLI?
1. The Ames tes Show more could someone proofread my answers and let me know if any are incorrect? 1. The Ames test is: a. used to assay for potential carcinogens. b. based on the reversion of auxotrophic mutants of E. coli. c. Both a and b. d. None of the above. 2. A set of genes that are coordinately expressed under the control of the same operator and promoter is known as a(n) a. regulon b. operon c. transcription unit d. none of the above 3. The Polymerase Chain Reaction was discovered by: a. Griffiths b. Avery MacLeod and McCarty c. Watson and Crick d. Mullis 4. Which of the following processes involves the bacteriophage-mediated transfer of DNA between bacteria: a. transformation b. conjugation c. transposition d. transduction 5. In which mixture of bacterial strains can conjugation occur? a. F+ + F+ b. Hfr + Hfr c. Hfr + F+ d. None of the above 6. Which of the following statements is true of translation? a. It is very likely that each cell harbors a minimum of 20 aminoacyl tRNA synthetases. b. Occurs in the cytoplasm chloroplast and mitochondria of photosynthetic eukaryotes. c. Initiation of translation takes place at the promoter of a gene. d. All of the above statements are true e. Only a and b 7. Which is the favored carbon source of E. coli? A. lactose B. galactose C. glucose D. sucrose E. fructose Mark each of the following statements as true (A) or false (B) 8. Simultaneous transcription and translation of a mRNA template is common in eukaryotes: False it is common in prokaryotes 9. Ribosomal RNAs are responsible for transporting amino acids to the ribosome during translation: False that is the job of tRNAS 10. Initiation of protein synthesis in prokaryotes requires a component of the small subunit of the ribosome.: True? 11. Accessory protein factors are required during the initiation elongation and termination stages of translation. : True -Initiation Factors Elongation Factors Release Factors 12. Amino-acyl tRNA synthetases function during the elongation phase: True? False? 13. The region of a tRNA molecule that interacts with mRNA is known as the codon: False The anti-codon of tRNA interact with the codons on mRNA 14. Polypeptide chains are made in the N to C terminus direction: True 15. Translation involves movement of ribosomes of mRNA templates in a 3 to 5direction: False the opposite is true Show less
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