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Q. No.What was the key contribution of Cohen and Boyer to biotechnology?
1.
They discovered the structure of DNA.
2.
They developed the first recombinant DNA.
3.
They were the first to sequence the human genome.
4.
They discovered how to visualize DNA fragments using agarose gel electrophoresis
Subtopic: Introduction & History: I |
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Which statement is true regarding cloning vectors?
| 1. | Plasmids and bacteriophages can both serve as cloning vectors in gene cloning. |
| 2. | Cloning vectors are unnecessary in the process of creating recombinant DNA. |
| 3. | A vector must be larger than the DNA fragment it is designed to carry. |
| 4. | Only animal viruses can be used as vectors in gene cloning processes. |
Subtopic: Cloning Vector |
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Which of the following techniques is commonly used for the production of genetically modified dicot plants?
1. Polymerase Chain Reaction (PCR)
2. Southern blotting
3. Agarose gel electrophoresis
4. Agrobacterium-mediated gene transfer
1. Polymerase Chain Reaction (PCR)
2. Southern blotting
3. Agarose gel electrophoresis
4. Agrobacterium-mediated gene transfer
Subtopic: Transforming Plant & Animal Cell |
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Ti plasmid is found in:
1. Escherichia coli
2. Agrobacterium tumefaciens
3. Salmonella typhimurium
4. Haemophilus influenzae
1. Escherichia coli
2. Agrobacterium tumefaciens
3. Salmonella typhimurium
4. Haemophilus influenzae
Subtopic: Transforming Plant & Animal Cell |
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Restriction enzymes are named:
| 1. | After the scientist who discovered them. |
| 2. | After the bacterial species from which they are derived. |
| 3. | According to the number of base pairs they cut. |
| 4. | Based on the type of DNA they recognize. |
Subtopic: Restriction Enzymes - Main Enzymes |
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Why is Taq polymerase used in PCR?
| 1. | It is heat-stable and can withstand the high temperatures of PCR. |
| 2. | It is more accurate than other DNA polymerases. |
| 3. | It can replicate DNA without a template. |
| 4. | It denatures at lower temperatures, speeding up the PCR process. |
Subtopic: Polymerase Chain Reaction: PCR |
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Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:
| 1. | 6 bp | 2. | 4 bp |
| 3. | 10 bp | 4. | 8 bp |
Subtopic: Restriction Enzymes - Main Enzymes | Restriction Enzymes: Historical Background |
82%
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NEET - 2024
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The " Ti plasmid " of Agrobacterium tumefaciens stands for
| 1. | Tumor independent plasmid |
| 2. | Tumor inducing plasmid |
| 3. | Temperature independent plasmid |
| 4. | Tumour inhibiting plasmid |
Subtopic: Tools: Vectors: I |
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NEET - 2024
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Which of the following statements is incorrect?
| 1. | Most commonly used bio-reactors are of stirring type. |
| 2. | Bio-reactors are used to produce small scale bacterial cultures. |
| 3. | Bio-reactors have an agitator system, an oxygen delivery system and foam control system. |
| 4. | A bio-reactor provides optimal growth conditions for achieving the desired product. |
Subtopic: Bioreactors/Downstream Processing |
87%
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NEET - 2024
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The breakthrough work of which of the following scientist duo was the basis upon which the discipline of biotechnology was founded?
1. Nirenberg and Mathai
2. Cohen and Boyer
3. Millstein and Kohler
4. Khurana and Venkatraman
1. Nirenberg and Mathai
2. Cohen and Boyer
3. Millstein and Kohler
4. Khurana and Venkatraman
Subtopic: Principles of Biotechnology |
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