Q. No.In recombinant DNA technology antibiotics are used:
1. to keep medium bacteria-free
2. to detect alien DNA
3. to impart disease-resistance to the host plant
4. as selectable markers
Match the following techniques or instruments with their usage:
| (a) | Bioreactor | (i) | Separation of DNA fragments |
| (b) | Electrophoresis | (ii) | Production of large quantities of products |
| (c) | PCR | (iii) | Detection of pathogen, based on antigen-antibody reaction |
| (d) | ELISA | (iv) | Amplification of nucleic acids |
Select the correct option from the following:
| 1. | (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i) |
| 2. | (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii) |
| 3. | (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i) |
| 4. | (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv) |
In a mixture, DNA fragments are separated by-
1. Bioprocess engineering
2. Restriction digestion
3. Electrophoresis
4. Polymerase chain reaction
Spooling is:
| 1. | Amplification of DNA |
| 2. | Cutting of separated DNA bands from the agarose gel |
| 3. | Transfer of separated DNA fragments to synthetic membranes |
| 4. | Collection of isolated DNA |
Select the correct statement from the following:
| 1. | Gel electrophoresis is used for the amplification of a DNA segment. |
| 2. | The polymerase enzyme joins the gene of interest and the vector DNA. |
| 3. | Restriction enzyme digestions are performed by incubating purified DNA molecules with the restriction enzymes of optimum conditions. |
| 4. | PCR is used for the isolation and separation of genes of interest. |
In genetic engineering, the antibiotic-resistance gene is used:
1. To select healthy vectors
2. As sequences from where replication starts
3. To keep the cultures free of infection
4. As selectable markers
Which of the following are used in gene cloning:
1. Lomasomes
2. Mesosomes
3. Plasmids
4. Nucleoids
In genetic engineering, a DNA segment (gene) of interest is transferred to the host cell through a vector. Consider the following four agents (A-D) in this regard and select the correct option about which one or more of these can be used as a vector/vectors:
| A. | a bacterium | B. | plasmid |
| C. | plasmodium | D. | bacteriophage |
Options:
| 1. | (A) only | 2. | (A) and (C) only |
| 3. | (B) and (D) only | 4. | (A), (B) and (D) only |
Which one of the following techniques made it possible to genetically engineer living organisms?
1. Hybridization
2. Recombinant DNA techniques
3. X-ray diffraction
4. Heavier isotope labelling
First discovered restriction endonuclease that always cuts DNA molecules at a particular point by recognizing a specific sequence of six base pairs is:
1. EcoRI
2. Adenosine deaminase
3. Thermostable DNA polymerase
4. Hind II
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