Q. Which of the following statements about lac operon in e.coli is true?

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Q. Which of the following statements regarding the regulation of trp operon expression by attenuation is correct?

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Q. Which of the following increases gene expression as much as 200-fold?

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Q. The mechanism by which CBP activates transcription is

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Q. RNAi stands for

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Q. Which of the following about mRNA stability is not correct?

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Q. CAP is

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Q. Trp repressor is a

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Q. Attenuator sequences base-pair to form a stem-and-loop structure rich in

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Q. Which of the following regulatory sequence allows transcription to continue?

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Q. Formation of the attenuator stem-and-loop structure depends on the events that occur during translation of

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Q. Which of the following takes place when tryptophan levels are low?

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Q. Which of the following takes place when tryptophan levels are high?

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Q. Whose interaction with Lex-A facilitates the repressor’s self-cleavage reaction?

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Q. When DNA segment is in one orientation

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Q. Which of the following encodes recombinase?

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Q. Which of the following is not true about secondary protein structure?

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Q. A structure that has hydrogen bonds between polypeptide chains arranged side by side is

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Q. Which of the following are important for white blood cell recognition?

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