Biotechnology in Agriculture
Biotechnology in Agriculture: Overview
This topic covers concepts such as Biotechnological Applications in Agriculture, Bt Cotton, Pest Resistant Plants, RNA Interference, Flavr Savr Tomato, Golden Rice, Biotechnology and its Applications, and Bt Brinjal.
Important Questions on Biotechnology in Agriculture
Choose the mechanism that is used in the tobacco plants that are introduced with nematode-specific using certain vectors.

Identify the cry-genes that control corn borer:

Identify the source of cry genes from the given options:

Transgenic tobacco plants are protected against:

Gibberellins are hormones required for stem elongation and thereby the overall height of the plant. Bioactive binds to its receptor and subsequently activates the gene expression leading to stem growth. In the absence of , the repressor blocks transcription of inducible genes. binds to a receptor in the nucleus and the complex then binds to the repressor. Formation of complex leads to degradation of . This event unlocks the transcriptional activator allowing it to transcribe the inducible genes. Based on this information, the correct statement(s) is(are)

The DNA that has been introduced in tobacco plants to provide resistance against nematode, produces

Select the odd one out:

Which method of crop improvement can be practised by a farmer if he is inexperienced?

Bt cotton is not:

The roots of the _____ plant are most commonly infested by nematode Meloidegyne incognitia.

Bt toxin produced by Bacillus thuringiensis does not kill the producer because the toxin is

The novel strategy used to prevent the infestation of roots of the tobacco plant by nematode Meloidegyne incognitia makes use of the

Match the following:
List - I | List - II | List - III |
A) Hairy leaves | i) Animal manure and sewage |
I. Potato |
B) Spirulina | ii) Bacterial blight | II. Jassids in cotton |
C) Apical meristem | iii) Resistance to pests | III. Cowpea |
D) Pusa Komal | iv) Disease Resistance | IV. Rich with protein |
The correct answer is-

RNA interference (RNAi) is a mechanism that

Assertion transgenic crops are more tolerant to abiotic stresses.
Reason toxins are coded by 'cry' genes.

In addition to the production of high yielding and disease-resistant varieties, genetic modification has:
i) helped to reduce post-harvest losses
ii) decreased the nutritional value of food
iii) reduced reliance on chemical pesticides
iv) decreased the efficiency of mineral usage by plants
v) produced crops that are resilient to environmental stresses
The correct combination is

Choose the incorrect statements among the following:
A) Genetically modified crops have less tolerance to abiotic stress like heat and drought.
B) The proteins encoded by the genes Cry I Ac, and Cry II Ab control cotton bollworm, while Cry I Ab control corn stem borer.
C) RNA I takes place in all organisms as a method of cellular defence.
D) Hereditary diseases can be treated through gene therapy.

Which among the following parasitizes the tobacco plant?

Study the following statements and select the incorrect ones.
i. $\mathrm{Bt}^{\prime}$ in $\mathrm{Bt}$ cotton' indicates that it is a nongenetically modified crop produced through biotechnology.
ii. The anticoagulant 'hirudin' is being produced from transgenic Brassica napus seeds.
iii. 'FlaviSavr' transgenic tomatoes remain fresh for a longer period than the normal tomato variety.
iv. Golden rice is a transgenic variety of Oryza sativa, which is rich $\beta$ -carotene and helps to prevent colour blindness.

In RNA interference, genes are silenced using
