In prokaryotes, the predominant site for control of gene expression is the  :

(1) transcription initiation 

(2) processing level

(3) transport of mRNA 

(4) translation level

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In Hershey and Chase experiment, what finding led to the conclusion that DNA is the genetic material ?

(1) The presence of radioactivity in the bacteria when 35S was used.

(2) The presence of radioactivity in the supernatant when 35S was used.

(3) The presence of radioactivity in the bacteria when 32P was used.

(4) The presence of radioactivity in the supernatant when 32P was used.

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Which of the following important biochemical reactions in living systems is catalyzed by a ribozyme?

(1) Repair of DNA

(2) Electron transport chain

(3) Formation of peptide bond

(4) Organization of MTOC during cell division

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VNTR are useful in DNA profiling because they:

I. Are hypervariable

II. Are inherited

III. Synthesize constitutiveenzymes

(1) I, II, III are correct

(2) I and II are correct

(3) I and III are correct

(4) II and III are correct   

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Match each item in COLUMN I with one in COLUMN II and select your answer from the codes given:

COLUMN I

 COLUMN II

SCIENTIST

   CONTRIBUTION

Francis Crick

a. Breaking the genetic code

Nirenberg         

b. Eastablished Coenorthabditis elegans as as a model genetics  study organism

Benzer 

c. Central dogma of molecular biology

Brenner           

d. Bacteriophase genetics 

 

A    

B     

C     

D

(1)  

c

a

d

b

(2)

c

a

B

d

(3)

a

b

c

d

(4)

a

c

d

B

 

 

Concept Questions :-

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

(1) Peptidyl transferase

(2) RNA polymerase

(3) Reverse transcriptase

(4) Polynucleotide phosphorylase

Concept Questions :-

Genetic Code: I
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The process of RNA splicing shows the dominance of :

(1) DNA world

(2) RNA world

(3) Protein world

(4) Microbial world

Concept Questions :-

Transcription: IV
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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

Concept Questions :-

Transcription: IV
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In eukaryotes RNA polymerase II transcribes :

(1) mRNA

(2) rRNA

(3) tRNA

(4) hnRNA

Concept Questions :-

Transcription: IV
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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

Concept Questions :-

Transcription: III
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