Practice free Biotechnology and its Applications (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The 'T-DNA' transferred by Agrobacterium tumifaciens to plant cells typically results in:
Agrobacterium tumifaciens 'is able to deliver a piece of DNA known as ‘T-DNA’ to transform normal plant cells into a tumor and direct these tumor cells to produce the chemicals required by the pathogen.'
Why did the RNAi-based strategy for Meloidogyne incognitia infeststion in tobacco involve the production of both sense and anti-sense RNA?
The context states: 'The introduction of DNA was such that it produced both sense and anti-sense RNA in the host cells. These two RNA’s being complementary to each other formed a double stranded (dsRNA) that initiated RNAi...'
What specific type of genetic engineering tool from bacteria and viruses did scientists learn from to transfer genes into plants and animals?
The text says: '...we have learnt the lesson of transferring genes into plants and animals from bacteria and viruses which have known this for ages – how to deliver genes to transform eukaryotic cells and force them to do what the bacteria or viruses want.'
The use of baculoviruses as biological control agents for insect pests is considered desirable for integrated pest management (IPM) programs primarily because:
The context states, 'The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects.'
Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment?
Routine serum/urine analyses do not give early molecular-level diagnosis like rDNA, PCR, or ELISA.
Match List I with List II:
| List I | List II |
|---|---|
| A. $\alpha$-1 antitrypsin | I. Cotton bollworm |
| B. Cry IAb | II. ADA deficiency |
| C. Cry IAc | III. Emphysema |
| D. Enzyme replacement therapy | IV. Corn borer |
Choose the correct answer from the options given below:
$\alpha$-1 antitrypsin — emphysema; Cry IAb — corn borer; Cry IAc — cotton bollworm; ERT — ADA deficiency.
Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?
Eli Lilly produced human insulin (Humulin) using genetically engineered Escherichia coli — a bacterium expressing the A and B insulin chains.
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