MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Bt gene which produces a protein toxic to insect larvae is ______ |
| A. | try |
| B. | pry |
| C. | ary |
| D. | cry |
| Answer» E. | |
| 2. |
Toxic content of B. thuringiensis is _______ in nature. |
| A. | protein |
| B. | steroid |
| C. | amino acid |
| D. | alkaloid |
| Answer» B. steroid | |
| 3. |
Ti plasmid is found in ________ |
| A. | <em>Nitrosomonas</em> |
| B. | <em> Escherichia</em> |
| C. | <em>Agrobacterium</em> |
| D. | <em>Bacillus</em> |
| Answer» D. <em>Bacillus</em> | |
| 4. |
A gall producing gene in Agrobacterium tumefaciens is _______ |
| A. | cry gene |
| B. | nif gene |
| C. | T DNA |
| D. | beta gene |
| Answer» D. beta gene | |
| 5. |
To which cells does the activated Bt toxin bind? |
| A. | Neuroglial cells |
| B. | Lymphocytes |
| C. | Skeletal muscle cells |
| D. | Epithelial cells |
| Answer» E. | |
| 6. |
The Bt toxin does not kill the Bacillus because the Bt toxin protein exist as inactive ________ |
| A. | lipid |
| B. | protoxins |
| C. | protein |
| D. | carbohydrate |
| Answer» C. protein | |
| 7. |
The protein crystals of B. thuringiensis contain toxic _______ protein. |
| A. | bactericidal |
| B. | fungicidal |
| C. | insecticidal |
| D. | antibiotic |
| Answer» D. antibiotic | |
| 8. |
The gene which was used to produce insect-resistant cotton plant was taken from ______ |
| A. | <em>Anabaena azollae</em> |
| B. | <em>Agrobacterium tumefaciens</em> |
| C. | <em>Bacillus thuringiensis</em> |
| D. | <em>Bacillus subtilis</em> |
| Answer» D. <em>Bacillus subtilis</em> | |
| 9. |
Insect resistance transgenic cotton has been developed by inserting a piece of DNA from ______ |
| A. | an insect |
| B. | wild relative of cotton |
| C. | a virus |
| D. | a soil bacterium |
| Answer» E. | |
| 10. |
Bt cotton is a _______ |
| A. | cloned plant |
| B. | transgenic plant |
| C. | hybrid plant |
| D. | mutated plant |
| Answer» C. hybrid plant | |
| 11. |
Some strains of Bacillus thuringiensis can kill certain insects such as _______ |
| A. | lepidopterans |
| B. | scorpion |
| C. | fruit fly |
| D. | dragonfly |
| Answer» B. scorpion | |