10 The following gene is not turned on during the second round of transcription

Question

10 The following gene is not turned on during the second round of transcription in the lambda operon a) cll b) clll c) O d) P e) Q g) int 11) Amutation that renders the RecA protein non-functional would affect lambda by: a) preventing lysis b) Preventing the second round of transcription c) preventing the first round of transcription d) preventing lysogeny e) preventing the repressor from functioning f) all of the above 12) Which statement is true concerning lambda operon organization a) The left arm only contains genes that are expressed late while the right arm only contains genes that are expressed early b) The left and right arms con c) The left arm only contains genes that are expressed late while the right arm contains genes tain genes that are expressed late and early that are expressed early and late d) The left arm contains genes that are expressed late while the right arm only contains genes that are expressed early e) Upon recircularization, all the late genes are grouped together f) a and c g) c and e h) h)b and c

Explanation / Answer

Ans 10. CIII

11. ‘D’preventing lysogeny. RecA induces lysogeny or prophage, in the absence ot it or mutation leads to lytic cycle

12. Answer ‘h)’ is correct, i feel answer should be e) b and c, because b,c,e are right answers

13. a) inducible positive

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