NtrC controls expression of genes involved in nitrogen metabolism by inducing a conformational change in a pre-bound RNA polymerase, triggering transition to the open complex.

I. Under low nitrogen level condition, NtrC is phosphorylated by a kinase, NtrB,

II. NtrC (bound to its sites upstream) interacts directly with s54. This requires that the DNA between the activator binding sites and the promoter form a loop to accommodate the interaction

III. Active NtrC binds four sites located approximately 150 bp upstream of the glnA gene.

IV. NtrC itself has an ATPase activity which provides the energy needed to induce a conformational change in polymerase.

Correct series of Activation by NtrC is;

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#Question id: 4872

#Unit 8. Inheritance Biology

F1 heterozygous females are test-crossed with males and produced 1800 progeny The interference between these genes is 0.4. What number is of observe double cross over? 

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#Question id: 11644

#Unit 7. System Physiology – Animal

Seven days after ovulation, pituitary secretion of luteinizing hormone (LH) decreases rapidly. What is the cause of this decrease in secretion?

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#Question id: 2327

#Unit 2. Cellular Organization

9 + 2 arrangement refers to the:

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#Question id: 14727

#Unit 13. Methods in Biology

Two persons A and B have respectively n + 1 and n coins, which they toss simultaneously. Then the probability that A will have more heads than B is

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#Question id: 8891

#Unit 9. Diversity of Life Forms

While vacationing in a country that lacks adequate meat inspection, a student ate undercooked ground beef. Sometime later the student became easily fatigued, and lost body weight. At about the same time, whitish, flattened, rectangular objects full of small white spheres started appearing in his feces. Administration of niclosamide cured the problem. The student had probably been infected by a