Which enzyme polymerizes RNA with defined sequences in a template independent manner?

(1) Peptidyl transferase

(2) RNA polymerase

(3) Reverse transcriptase

(4) Polynucleotide phosphorylase

The process of RNA splicing shows the dominance of :

(1) DNA world

(2) RNA world

(3) Protein world

(4) Microbial world

In RNA splicing :

(1) Exons are removed and introns are joined together

(2) Introns are removed and exons are joined together

(3) Cistrons are removed and introns are joined together

(4) Introns are removed and Cistrons are joined together

The core RNA polymerase is capable of catalyzing which steps of transcription ?

(1) Initiation only

(2) Elongation only

(3) Termination only

(4) All of these

In most prokaryotes the transcription unit is :

(1) Mono-cistronic

(2) Poly-cistronic

(3) Multi-cistronic

(4) Uni-cistronic

The DNA dependent DNA polymerases catalyze:

1. Only in 3'-5' direction

2. Only in 5'-3' direction

3. In both directions

4. In neither directions

Reverse transcriptase is a:

(1) DNA dependent RNA polymerase

(2) RNA dependent DNA polymerase

(3) RNA dependent RNA polymerase

(4) DNA dependent DNA polymerase

A molecule that can act as a genetic material must fulfill all the following criteria except :

(1) It should be able to generate its replica

(2) It should chemically and structurally be stable

(3) It should provide scope for rapid mutations

(4) It should be able to express itself in the form of "Mendelian Characters"

The unequivocal proof that DNA is the genetic material was provided by :

(1) Avery, Macleod and McCarty

(2) Hershey and Chase

(3) Meselson and Stahl

(4) Watson and Crick

Which of the following is not a feature of the double helix model of DNA ?

(1) The two chains have anti-parallel polarity

(2) A purine always comes opposite to a pyrimidine

(3) The pitch of the DNA is 3.4 nm

(4) The two chains are coiled in a left handed fashion