In the presence of allolactose, the lac repressor in the operon of E.coil : 
1. Binds to the operator 
2. Cannot bind to the operator 
3. Binds to the promoter 
4. Binds to the regulator 
 

Subtopic:  Gene Regulation: Lac Operon |
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Taylor and colleagues performed experiments on ............ using radioactive ............ to prove that the DNA in chromosomes replicate semi-conservatively. 
Select the correct option for the blanks. 
1. Vicia faba, Uridine 
2. E. coli, Uridline 
3. Vicia faba, Thymidine 
4. E.coil, Thymidine 
Subtopic:  DNA Replication: II |
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The reactive hydroxyl group in the nucleotide of RNA is: 
1. \(5'~OH\)
2. \(4'~OH\)
3. \(3'~OH\)
4. \(2'~OH\)
 
Subtopic:  DNA vs RNA as Genetic Material |
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In a bacterium when RNA-polymerase binds to the promoter on a transcription unit during transcription, it
1. terminates the process
2. helps remove introns
3. initiates the process
4. inactivates the exons
Subtopic:  Transcription |
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Study the given diagrammatic representation of Griffith's experiments to demonstrate transformation in bacteria.

Select the option which is incorrectly representing the experiment : 
1. (i) and (iii) 
2. (ii) and (iii) 
3. (iii) and (iv) 
4. (ii) and (iv) 
Subtopic:  Search for Genetic Material |
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Which one of the following diagram correctly represents DNA replication in eukaryotes? 
1. 2.
3. 4.
Subtopic:  DNA Replication |
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In the given figure of translation machinery of eukaryotes, select the correct labellings for (i), (ii), (iii) and (iv) : 
  

1. (i) Codon, (ii) Anticodon, (iii) tRNA, (iv) 3'end of mRNA 
2. (i) Anticodon, (ii) Codon, (iii) 3'end of mRNA , (iv) 5'end of mRNA 
3. (i) Polypeptide chain, (ii) Large subunit of ribosome, (iii) 5'end of mRNA, (iv) tRNA 
4. (i) Ribozyme, (ii) Polypeptide chain, (iii) tRNA, (iv) 5'end of tRNA 
Subtopic:  Translation |
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Select the important goals of HGP from the given options:
(i) Store the information for data analysis.
(ii) Cloning and amplification of human DNA.
(iii) Identify all the genes present in human DNA.
(iv) Use of DNA information to trace human history.
1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (ii)
4. (ii) and (iv)
Subtopic:  Human Genome Project |
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Study the given picture related to replication. It is _______ type of replication.

1. Conservative. 
2. Semi-conservative. 
3. Dispersive.
4. Data is insufficient. 
Subtopic:  DNA Replication: I |
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Assertion (A):  There is a set of negatively charged basic proteins called Histone.
Reason (R):  Histone octamer is made of eight histone molecules.
 
1.  Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
Subtopic:  DNA Packaging |
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