BIO 230 FINAL EXAM ADDITIONAL REVIEW QUESTIONS

BIO 230 FINAL EXAM ADDITIONAL REVIEW QUESTIONS 1. What are the two components of the proton-motive force? a)pH gradient and equilibrium b) pH gradient and voltage c)voltage and ATP d) voltage and lipid-soluble agents 2. Which molecule is responsible for unwinding DNA supercoils before replication in E. coli? a. DNA helicase b. DNA ligase c. DNA polymerase III d. Gyrase e. Topoisomerase I/II 3. What is the likely cause of an operon that is normally inducible switching to always on, regardless of the presence of the inducer molecule? a. The repressor is always on b. The repressor has been inactivated c. There is more RNA polymerase d. There is no feedback inhibition 4. Comparing protein structures of transcription factors (TFs), we find that multiple TFs share a region with a common structure. What is the likely function of this structure? a. It is the DNA binding domain b. It recognizes the codon c. It is the corepressor domain d. It is the activation domain e. All of the above