What limitation of traditional hybridization used for plant and animal breeding has been overcome by

the use of rDNA techniques?

1. High cost

2. Insertion of undesirable genes

3. Complexity of the procedure

4. Antigenicity of the product

Subtopic:  Introduction & History: II | Introduction & History |
 76%
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What is true A,B and C in the given diagrammatic representation of rDNA technology ?

I. At A same restriction enzyme is used to cut both foreign and vector DNA

II. The enzyme used at B is DNA ligase

III. Step C can be called as transformation

1. I and II only

2. I and III only

3. II and III only

4. I,II and III

Subtopic:  Introduction & History: II | Tools: Enzymes: I | Introduction & History | Tools |
 88%
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The cutting of DNA at specific locations became possible with the discovery of 

(1) restriction enzymes

(2) probes

(3) selectable markets

(4) ligases

Subtopic:  Introduction & History: II | Tools: Enzymes: II | Introduction & History | Tools |
 94%
From NCERT
NEET - 2015
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Introduction of  foreign genes for improving genotype is

1. biotechnology 

2. vernalization

3. tissue culture

4. genetic engineering

Subtopic:  Introduction & History: I | Introduction & History: II | Introduction & History |
 74%
From NCERT
AIIMS - 2002
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In 1960’s two enzymes were discovered in bacteria that were responsible for providing immunity against bacteriophages. One was Restriction Endonuclease and the other was

1. Methylase

2. Exonuclease

3. Aminotransferase

4. Terminal Transferase

Subtopic:  Introduction & History: II | Tools: Enzymes: I | Introduction & History | Tools |
 70%
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Which of the following is not a core technique which gave birth to modern biotechnology?

1.      Genetic engineering

2.      Bioprocess engineering

3.      Fermentation

4.     Both 1 and 2

Subtopic:  Introduction & History: II | Introduction & History |
 78%
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Variations which are the results of sexual reproduction will

1.      Always bad for a population

2.      Not always good for individual but for population

3.      Not always good for individual and population

4.     Always good for individual

Subtopic:  Introduction & History: II | Introduction & History |
 51%
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Cohen and Boyer are known for which of the following discoveries?

1.      Antibiotic resistance gene

2.      Recombinant DNA

3.      Restriction Digestion

4.     Plasmid

Subtopic:  Introduction & History: II | Introduction & History |
 68%
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Bacterial cells synthesize restriction endonucleases because restriction endonucleases help the bacterial cells:
1.    grow readily in medium containing antibodies.
2.    protect themselves from viral infection.
3.    open up the DNA in their chromosomes so that transcription is easier.
4.    take up foreign DNA from their environment and combine it into their genome.
 
Subtopic:  Introduction & History: I | Introduction & History: II | Restriction Enzymes - Main Enzymes |
 62%
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The discipline of biotechnology was founded on the breakthrough work of:
1.Bolivar and Rodriquez2.Cohen and Boyer
3.Nathans and Daniels4.Redi and Spallanzani
Subtopic:  Introduction & History: I | Introduction & History: II | Restriction Enzymes: Historical Background |
 87%
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