Consider the following statements. I. rRNA provides the template for synthesis of proteins. II. tRNA brings amino acids and reads the genetic code. III. RNA polymerase binds to promoter and initiates transcription. IV. A segment of DNA coding for polypeptide is called intron.

1.  I and III are correct

2.  I and II are correct

3.  I, II and IV are correct

4.  II and III are correct

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4
Correct Answer :

II and III are correct


Explanation :
No Explanation available for this question

In the Lac operon system, β-galactosidase is coded by

1.  a-gene

2.  i-gene

3.  l-gene

4.  y-gene

5.  z-gene

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5
Correct Answer :

z-gene


Explanation :
No Explanation available for this question

In bacteria, the formation of peptide bond during translation is effected by

1.  lysozyme

2.  ribozyme

3.  nucleosome

4.  microsome

5.  peroxisome

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5
Correct Answer :

ribozyme


Explanation :
No Explanation available for this question

At 5’ end polynucleotide chain

1.  —OH group is attached

2.  phosphate group is attached

3.  pentose sugar is attached

4.  —H bond is present

5.  

View Answer  
5
Correct Answer :

phosphate group is attached


Explanation :
No Explanation available for this question

Reverse transcriptase is

1.  DNA dependent DNA polymerase

2.  RNA dependent DNA polymerase

3.  DNA dependent RNA polymerase

4.  RNA dependent RNA polymerase

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4
Correct Answer :

RNA dependent DNA polymerase


Explanation :
No Explanation available for this question

During chain elongation, peptide bond is formed between carboxyl group of first and amino group of second amino acid by

1.  peptidyl transferase

2.  DNA ligase

3.  Taq polymerase

4.  helicase

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4
Correct Answer :

peptidyl transferase


Explanation :
No Explanation available for this question

How many effective codons are there for the synthesis of twenty amino acids

1.  64

2.  32

3.  60

4.  61

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4
Correct Answer :

61


Explanation :
No Explanation available for this question

Removal of introns and joining the exons in a defined order in a transcription unit is called

1.  splicing

2.  tailing

3.  transformation

4.  capping

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4
Correct Answer :

splicing


Explanation :
No Explanation available for this question

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a triplet

1.  Nirenberg and Mathaei

2.  Hershey and Chase

3.  Morgan and Strulevant

4.  Beadle and Tatum

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4
Correct Answer :

Nirenberg and Mathaei


Explanation :
No Explanation available for this question

Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid

1.  GUU, GCU — Alanine

2.  UAG, UGA — Stop

3.  AUG, ACG — Start/Methionine

4.   UUA, UCA — Leucine

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4
Correct Answer :

UAG, UGA — Stop


Explanation :
No Explanation available for this question
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