Exam 5 A_Key - BIO 226R Whiteley Exam 5A Name: _Key_...

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BIO 226R Whiteley Exam 5A Name: ____________ Key_ ____________ Discussion Time:______________ Multiple Choice/Fill in the blank/True-False (3 points each) 1. ____ In two-component regulatory systems a signal is relayed to the regulator protein by ____. A. phosphorylation. B. adenylylation. C. autoinducer. D. a peptide. 2. ___ Bacterial quorum sensing system use ___ to determine cell density. A. cell-cell contact B. acylated homoserine lactones (AHLs) C. luminescence D. phosphorylated homocysteine 3. ____ From 16S rRNA analysis we have learned that ____. A. Archaea and Bacteria are closely related. B. photosynthesis evolved in the Archaea. C. the prokaryotes constitute one of the three domains of life. D. the prokaryotes constitute two of the three domains of life 4. ____ Biofilms are A. a protective mode of bacterial growth. B. are inherently resistant to antibiotics C. a structured community of bacterial cells attached to a surface. D. B and C E. All of the above 5. ____ The RNA-dependent RNA polymerase found in influenza virus which produces a + strand from the - strand influenza virus genome is called A. reverse transcriptase B. helicase C. neuraminidase D. replicase
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6. _____ The genome of a virus is A. Always DNA B. Always RNA C. DNA and RNA D. Either DNA or RNA 7. _____ All viruses have A. capsids B. envelopes C. glycoprotein spikes D. reverse transcriptase 8. _____ Why is the 16S/18S rRNA gene used as a molecular "clock" for tracing the
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Exam 5 A_Key - BIO 226R Whiteley Exam 5A Name: _Key_...

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