Name Seotion EXAM #4 SIOL 20 MICROBIOLOGY, SUMMER 201 In addition to placing you
ID: 301571 • Letter: N
Question
Name Seotion EXAM #4 SIOL 20 MICROBIOLOGY, SUMMER 201 In addition to placing your name and section " on this page, make sure your name, soction # and toat version are written on your scantron. All questions are muliple choico, truoase, or matching Each of these questions are worth 2 points, Mako sure you ranafer your answers carebully to the scantron Folow ALL directions 1. The Ames test is used for detecting chemicals with carcinogenio poteritial orF 2 The DNA sequence of a portion of a gene in a wild-type organism is TTACCATATTCACCO and the corresponding peptide sequence is Leu Pro Tyr Ser Pro The corresponding gene fragment in a phenotypic variant of the organism is TTAGCATATCTCACCC and the peptide sequence is Leu-Pro-Tyr-Leu-Thr This is an example of a(n) mutation (lype) resulting in a mutation (effect) A. insertion, missense B base substitution, missense C. base substitution, silent D. deletion, missense 3. The horizontal transfer process known as transduction A, involves a virus B requires a pilus C requires a cell tobe "competent" D requires a plasmid E. involves a mutagen Match the terms with the definition. (4-7) 4. Removal or destruction of all microbes, including endospores and viruses, on inanimate objects A Antisep B. Disin C. Sa D. S 5 Inhibition or destruction of most microbes on inanimate surfaces 6. The use of chemical agents directly on exposed body surfaces to destroy or inhibit most microbes 7. The mechanical removal of most microbes 8. Air can be disinfected using A. HEPA fiters B. ethylene oxide C. UV light D. A&C; EB&C;Explanation / Answer
1. Ames test is used for determination of carcinogenic material. This is true statement.
2. The DNA sequence is substituted because one base is substituted with another nucleotide base. Since, this substitution, resulted in change of amino acid in the resultant peptide. Hence, option b is correct.
3. The transduction involve horizontal transfer with the help of virus. Hence, option a is correct.
8. Air can be filter using HEPA filter and UV light. Hence, option D is correct.
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