Q. No.Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein:
1.
does not kill the carrier bacterium which is itself resistant to this toxin
2.
binds with epithelial cells of the midgut of the insect pest ultimately killing it
3.
is coded by several genes including the gene cry.
4.
is activated by acid pH of the foregut of the insect pest.
Silencing of mRNA has been used in producing transgenic plants resistant to:
1. Bacterial blights
2. Bollworms
3. Nematodes
4. White rusts
Read the following four statements (A-D) and find out certain mistakes in two of them:
| A: | The first transgenic buffalo, Rosie, produced milk which was human alpha-lactalbumin enriched. |
| B: | Restriction enzymes are used in the isolation of DNA from other macro-molecules. |
| C: | Downstream processing is one of the steps of r-DNA technology. |
| D: | Disarmed pathogen vectors are also used in the transfer of r-DNA into the host. |
Which of the two statements has mistakes?
1. Statements (A) and (B)
2. Statements (B) and (C)
3. Statements (C) and (D)
4. Statements (A) and (C)
Which one of the following is now being commercially produced by biotechnological procedures:
1. Morphine
2. Quinine
3. Insulin
4. Nicotine
The first clinical gene therapy was given for treating:
1. Chickenpox
2. Rheumatoid arthritis
3. Adenosine deaminase deficiency
4. Diabetes mellitus
Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells):
1. A particular hormone
2. An antifeedant
3. A toxic protein
4. Both sense and anti-sense RNA
| 1. | Synthesis of cDNA from RNA using reverse transcriptase |
| 2. | Silencing of specific mRNA due to complementary RNA |
| 3. | Interference of RNA in the synthesis of DNA |
| 4. | Synthesis of mRNA from DNA |
| 1. | genetically uniform population identical to the original parent |
| 2. | homozygous diploid plants |
| 3. | development of new species |
| 4. | variants through picking up somaclonal variations |
1. Adenovirus
2. Cosmid
3. Ri plasmid
4. Ti plasmid
| 1. | The pattern of development of a somatic embryo is comparable to that of a zygotic embryo |
| 2. | Somatic embryos can develop from microspores |
| 3. | Somatic embryo is induced usually by an auxin such as 2, 4–D |
| 4. | A somatic embryo develops from a somatic cell |
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