TLS Online TPP Program

#Question id: 11634


Given below, is the result of a complementation test for six independent mutants (A to H) '+' represents complementation; '-' represents noncomplementation Based on the above, which one of the following conclusions is correct?

#Unit 8. Inheritance Biology
  1. All mutations belong to a single cistron, but their order cannot be determined

  2. The mutations can be ordered in a single cistron as A-C-E-B-D-F-H-G
  3. There are two cistrons, mutations A, C, E, G and H represents one cistron, B, D, F and G represent the second cistron.
  4. There are three cistrons, mutations A, C, E and H represents one cistron, B, D and F represent the second cistron and G represents the third cistron.
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TLS Online TPP Program

#Question id: 4477

#Unit 3. Fundamental Processes

The large subunit of Pol II has a carboxy-terminal domain (CTD), which is referred to as the “tail”. The CTD contains a series of repeats of the heptapeptide sequence is;

TLS Online TPP Program

#Question id: 4478

#Unit 3. Fundamental Processes

In prokaryotes during abortive initiation, the polymerase synthesizes a series of short transcripts. In eukaryotes, promoter escape involves;

TLS Online TPP Program

#Question id: 4479

#Unit 3. Fundamental Processes

The stepwise assembly of the Pol II preinitiation complex

TLS Online TPP Program

#Question id: 4480

#Unit 3. Fundamental Processes

The reason for TBP’s unorthodox recognition mechanism is

TLS Online TPP Program

#Question id: 4481

#Unit 3. Fundamental Processes

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.

TLS Online TPP Program

#Question id: 4482

#Unit 3. Fundamental Processes

The General Transcription Factors of RNA Polymerase, with their subunits, select correct matching

A.     TBP

      1

B.     TFIA

      11

C.     TAFs

       2

D.     TFIIH

      10