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

In eukaryotes RNA polymerase II transcribes :

(1) mRNA

(2) rRNA

(3) tRNA

(4) hnRNA

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

What defines the position and presence of coding and a template strand in the transcription unit ?

(1) Structural gene

(2) Ori

(3) Terminator

(4) Promoter

Which of the following is true for both transcription and DNA replication?

1. Principle of complementarity governs the processes

2. Only of the two strands act as template

3. Only a segment of both strands is involved 

4. Adenine base pairs with thymine

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

Which of the following acts as the substrate and provide energy for DNA replication?

(1) Dideoxyribonucleoside triphosphates

(2) Ribonucleoside triphosphates

(3) Deoxyribonucleoside triphosphates

(4) Deoxyribonucleotide triphosphates

Which non-radioactive isotope was used by Meselson and Stahl to label DNA in their experiment?

\(1.\ {}^{35}S\)

\(2.\   {}^{15} N\)

\(3.{}^{32} P\)

\(4.\   N o n e\)

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"