final bio226R_key - BIO 226R Final Exam (Whiteley)...

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BIO 226R Final Exam (Whiteley) Name:______ Key ________________ Discussion time:_______ UT eID:_____________________ All question 1.25 points 1. _D___ Small protein that associates with bacterial RNA polymerase to facilitate promoter recognition and is released during transcription. A. alpha factor B. beta factor C. gamma factor D. sigma factor 2. __B__ Most prokaryotic promoters have a two-part consensus DNA sequence that consists of a(n) __________________. A. promoter and terminator. B. –10 and –35 region. C. activator and operator. D. promoter and operator. 3. __B_ If E. coli were grown in a medium containing radioactive phosphorus ( 32 P), the 32 P would be found in all of the following molecules or parts of the cell EXCEPT: A. ATP B. monosaccharides C. DNA D. plasma membrane 4. _D___ Phospholipids are mainly found in: A. ribosomes B. b. DNA C. c. RNA D. d. membranes E. e. cell walls 5. __D__ Which of the following statements about DNA is FALSE? A. Enzymes are required for DNA replication. B. The two strands of a DNA molecule run in opposite directions (“antiparallel”). C. When DNA replicates, the two resulting double-stranded DNA molecules each contain one strand from the original DNA molecule. D. The two strands of a DNA molecule are fastened to each other by strong, covalent bonds between the nitrogenous bases. E. Watson and Crick determined the structure of DNA in the mid-1900s. 6. ___A_ How would the DNA sequence TCGGCAATATC be transcribed? A. AGCCGUUAUAG B. AGCCGTTATAG C. GTAATGCCGAT D. CAAGCTTAUGC
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7. __B__ In protein synthesis, the codon, which is part of the ____________ molecule, binds with the anticodon, which is part of the _____________ molecule. A. DNA … mRNA B. mRNA … tRNA C. mRNA … DNA D. tRNA … mRNA E. DNA … tRNA 8. __C__ Which of the following statements about viruses is FALSE? A. Viruses contain DNA or RNA. B. The nucleic acid of a virus is always surrounded by a protein coat. C. Viruses multiply inside living cells using viral mRNA, tRNA, and ribosomes. D. Viruses can infect only certain types of cells in certain host 9. _E___ Viroids and prions: A. are both proteins that can take an infectious or a noninfectious form. B. are both RNA that can take an infectious or noninfectious form. C. are tiny cells. D. can both infect both plants and animals. E. none of the above is correct. 10. __A or B__ Some parts of your body normally harbor a thriving community of bacteria (your resident microflora), but some parts are normally bacteria-free. Therefore, you should be concerned if your doctor finds bacteria thriving: A. in your respiratory tract B. in your blood C. in your intestinal tract D. in your mouth E. on your skin 11. _C____ Koch’s postulates are the rules by which scientists prove that a particular organism causes a particular disease. Which of the following does NOT belong with Koch’s postulates? A. the suspected pathogen must be present in diseased organisms but not
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final bio226R_key - BIO 226R Final Exam (Whiteley)...

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