Which of the following statements is true regarding bacterial RNA polymerase   

a. Core enzyme can efficiently transcribe both intact and nicked DNA 

b. Sigma destabilizes nonspecifically bound core 

c. Holoenzyme bind tightly to DNA 

d. Higher disassociation rate at lower temperature 

e. Most of the cellular sigma are house keeping gene

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#Question id: 14691

#Unit 13. Methods in Biology

In a shooting competition, the probability of hitting the target by A is 2/5, by B is 2/3 and by C is 3/5. If all of them fire independently at the same target, calculate the probability that only one of them will hit the target.

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#Question id: 14692

#Unit 13. Methods in Biology

A box contains 6 white balls and 3 black balls and another box contains 4 white balls and 5 black balls. The probability that a ball selected from one of the box again selected at random is a white ball.

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#Question id: 14693

#Unit 13. Methods in Biology

Two sisters A and B appeared for an Audition. The probability of selection of A is 1/5 and that of B is 2/7. The probability that both of them are selected is

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#Question id: 14694

#Unit 13. Methods in Biology

Two balls are to be drawn from a bag containing 5 red and 7 white balls. Find the chance that they will both be white

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#Question id: 14695

#Unit 13. Methods in Biology

From a bag containing 4 white and 5 black balls a man draws 3 at random. Then the probability that all 3 are black is

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#Question id: 14696

#Unit 13. Methods in Biology

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls, one ball is drawn at random from urn A and placed in urn B. Then one ball drawn at random from urn B and placed in urn A. If one ball is now drawn from urn A, the probability that it is found to be red is