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BIOL 121 (2010) Spring Exam 3

A a silent mutation in the coding sequence of x b a

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Unformatted text preview: Error! Reference source not found. 2 BIOL 121 Exam 2 04/26/2010 NAME: MULTIPLE CHOICE – circle the correct answer(s) PLEASE NOTE THAT MORE THAN ONE ANSWER MAY BE CORRECT 1) (3 pts) 2) 3) 4) Which of the following are cis- acting elements for the trp operon? A. B. C. D. the trp corepressor the promoter of the trp operon the trp repressor the trp operator Which of the following could block the ability of a micro RNA to silence expression of a gene X? A. A silent mutation in the coding sequence of X B. A mutation in the 3’ untranslated region of X C. A change in chromatin structure that increases transcription of X D. A change in an enhancer sequence that increases transcription of X (3 pts) Suppose that black hair (B) is dominant to white hair (b) in rabbits. In a populatio...
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