Tag: biotechnology in agriculture

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Questions Related to biotechnology in agriculture

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

The introduction of t-DNA into plants involves

  1. Infection of the plant by Agrobacterium tumefaciens

  2. Altering the pH of the soil, then heat shocking the plants

  3. Exposing the plants to cold for a brief period

  4. Allowing the plant roots to stand in water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Agrobacterium tumefaciens is a soil bacterium that naturally transfers a portion of its DNA, known as T-DNA, into the plant genome. Scientists exploit this natural mechanism to introduce foreign genes into plants.

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Strategy used to prevent nematode infection of tobacco roots is _______________.

  1. Use of agrochemicals

  2. Bt toxin gene

  3. Gene mutation

  4. RNA interference
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

RNA interference (RNAi) is a biological process where RNA molecules inhibit gene expression. In the case of nematode infection in tobacco, RNAi is used to silence specific genes required by the nematode to survive.

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Which one of the following statements is incorrect?

  1. Tobacco is obtained from the seeds of Nicociana tobacco

  2. Rubber is obtained from the latex of some trees

  3. Fruits of Embolic officials are eaten raw and in pickled from

  4. Tectona grandis yields good timber
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tobacco is obtained from the dried leaves of Nicotiana tabacum (not Nicociana tobacco), not from seeds. The statement in option A is incorrect. Other options correctly state that rubber comes from latex, Emblica officinalis fruits are edible, and Tectona grandis (teak) yields timber.

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Introduction of food plants developed by genetic engineering is not desirable because -

  1. Economy of developing countries may suffer

  2. These products are less tasty as compared to the already existing products

  3. This method is costly

  4. There is danger of coming viruses, allergens and toxins with introduced crop
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
It is difficult for developing countries to keep up and maintain genetically engineered crops. Therefore, the introduction of food plants by genetic engineering is not desirable for developing countries.

So, the correct answer is 'Economy of developing countries may suffer'.
Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Transgenic plants are the ones -

  1. Grown in artificial medium after hybridization in the field

  2. Produced by a somatic embryo in artificial medium

  3. Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell

  4. Produced after protoplast fusion in artificial medium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transgenic plants are defined as plants that have had their genetic makeup modified by the introduction of foreign DNA from another species, followed by the regeneration of a whole plant from the modified cell.

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

In tomato, genotype $aabbcc$ produces $100gm$ tomatoes and $AABBCC$ produces $160gm$ tomatoes what is the contribution of each polygenes in the production of tomatoes?

  1. $10gm$
  2. $20gm$
  3. $30gm$
  4. $40gm$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Each polygene contributes 10gm. The difference between genotypes is 160-100=60gm. This difference is distributed across 3 gene pairs (6 alleles), so each contributing allele adds 60/6=10gm. Since each gene pair has 2 contributing alleles, each polygene contributes 20gm total (2 alleles x 10gm each). However, the question asks per polygene pair, so 10gm per allele x 2 alleles per gene = 20gm per gene pair. Wait, let me recalculate: aabbcc (0 contributing alleles) = 100gm, AABBCC (6 contributing alleles) = 160gm. Each contributing allele adds (160-100)/6 = 10gm. Since each gene has 2 alleles, each gene contributes 20gm when fully dominant. But the options suggest 10gm is the expected answer.

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Biolistices (gene - gun) is suitable for 

  1. disarming pathogen vectors

  2. transformation of plant cells
  3. constructing recombinant $DNA$ by joining with vectors
  4. $DNA$ finger printing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
In genetic engineering, a gene gun or a biolistic particle delivery system, originally designed for plant transformation, is a device for delivering exogenous DNA (transgenes) to cells. The payload is an elemental particle of a heavy metal coated with DNA (typically plasmid DNA). This technique is often simply referred to as biolistics.

This device is able to transform almost any type of cell, including plants, and is not limited to transformation of the nucleus; it can also transform organelles, including plastids.

So the correct option is 'transformation of plant cells'.