Two trains of length 250 m and 140 m are running on parallel lines in the same direction at 58 km/h and 32 km/h respectively. Find the time taken by the slower train to pass the driver of the faster one.

#Question id: 4391

#Part-A Aptitude & General Biotechnology

What family of proteins plays an essential role in the repression of genes that help to direct the formation of specific tissues and organs in a developing embryo?

#Question id: 4392

#Part-A Aptitude & General Biotechnology

X chromosome inactivation in mammals is mediated by

#Question id: 4393

#Part-A Aptitude & General Biotechnology

Which of the following statement(s) regarding transcription initiation and RNA Pol III is (are) true?

#Question id: 4395

#Part-A Aptitude & General Biotechnology

Which of the following chemicals would be the most appropriate for the 5’ labeling of a DNA strand with a radioactive phosphate?

#Question id: 4480

#Part-B Specialized Branches in Biotechnology

The reason for TBP’s unorthodox recognition mechanism is

#Question id: 4481

#Part-B Specialized Branches in Biotechnology

Choose correct statements about recognition mechanism of TBP ;

A. TBP causes the minor groove to be widened to an almost flat conformation

B. It also bends the DNA by an angle of ~120o

C. The interaction between TBP and DNA involves maximum number of hydrogen bonds between the protein and the edges of the base.

D. Much of the specificity is imposed by two pairs of phenylalanine side chains that intercalate between the base pairs at either end of the recognition sequence and drive the strong bend in the DNA.