QUESTION 16 Which of the following is NOT a common DNA-binding motif? O A. the b

Question

QUESTION 16 Which of the following is NOT a common DNA-binding motif? O A. the beta sheet-alpha helix motif B. the zinc-finger motif O C. the homeodomain motif O D. the leucine-zipper motif O E. the helix-loop-helix motif QUESTION 17 2 po A mutant E. coli strain is found that synthesizes ?-galactosidase in the absence of glucose whether or not lactose is present. What two mutations might lead to this outcome? OA. lacP mutation or lacs mutation B. lacP mutation or lacoc mutation O C. lacF mutation or lacoc mutation D. lac mutation or lacoc mutation O E. Iacp-mutation or lac?mutation

Explanation / Answer

Beta sheet alpha helix motif are not commonly binding motifs because they can read information only present on surface of dna . option A is correct.

2 lac l mutation cause absesnce of inhibitor and lac Oc mutation causes inhibitor not to bind on operator and enzyme is synthesize countinusly.option c is correct.

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