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

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

(a) Ribosomes quickly translates sequence 1

(b) Sequence 2 is blocked before sequence 3 is transcribed

(c) Ribosomes pauses at the Try codons in sequence 1

(d) Attenuation at the attenuator structure formed by sequences of 3 and 4

The question was asked by my school principal while I was bunking the class.

This interesting question is from Regulation of Gene Expression in Prokaryotes in division Regulation of Gene Expression and Miscellaneous of Biochemistry

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Correct answer is (c) Ribosomes pauses at the Try codons in sequence 1

Easiest explanation: a, b and d take place when tryptophan levels are high.

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