Tag: gm crops

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

Second generation vaccines are prepared by recombinant DNA technology. Which out of the following are the examples of such vaccines?

  1. Hepatitis B virus vaccine

  2. Herpes virus vaccine

  3. Salk's polio vaccine

  4. Both (A) and (B)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Second generation vaccines are the vaccines which are prepared by recombinant DNA technique/ genetic engineering, e.g., hepatitis B virus vaccine, herpes virus vaccine and pneumonia vaccine. The yeast-derived recombinant hepatitis B virus vaccine is the first commercially available human vaccine produced by the genetic engineering technology. Hepatitis B vaccine is produced from transgenic yeast by recombinant DNA technology.
So, the correct answer is 'Both (A) and (B)'.
Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Golden rice is _____________________.

  1. A variety of rice grown along the yellow river in China

  2. Long stored rice having yellow cocur tint
  3. A transgenic rice having gene for $\beta$-carotene

  4. Wild variety of rice with yellow colored grains
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Golden rice is a transgenic variety of rice (Oryza Sativa) which contains good quantities of $\beta$-carotene ( provitamin A- inactive state of vitamin A). $\beta$-carotene is a principle source of vitamin A. Since the grains (seeds) of the rice are yellow in colour due to $\beta$-carotene, the rice is commonly called golden rice. 

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

The transgenic plant 'Flavr Savr' tomato carries an artificial gene for

  1. Delayed ripening process

  2. Longer shelf life

  3. Enhanced flavour

  4. All of these.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Flavr Savr is a genetically modified tomato  for human consumption. The transgenic plant 'Flavr Savr' tomato carries an artificial gene for slowing down the ripening process of the tomato and thus prevent it from softening and retains its natural colour , flavour and its shelf life. 

So, the correct option is 'Option D' .

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

Match column I containing transgenic organisms with their specific characteristics in column II and select the correct answer from the given codes.
Column I                   Column II
A. Golden rice        (i) Protein-enriched milk
B. Bt cotton            (ii) Increased shelf life
C. Flavr Savr          (iii) Enriched with vitamin A
D. Rosie cow         (iv) High yield and pest resistant

  1. A-(iii), B-(iv), C-(ii), D-(i)

  2. A-(iii), B-(ii), C-(iv), D-(i)

  3. A-(ii), B-(iv), D-(iii), D-(i)

  4. A-(i_, B-(iv), C-(ii), D-(iii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Column I                   Column II
A. Golden rice        (iii) Enriched with vitamin A ( It is the improved variety of rice enriched with vitamin A).
B. Bt cotton             (iv) High yield and pest resistant ( Bt toxin are the toxins that kills harmful pests and responsible for high yield) .
C. Flavr Savr            (ii) Increased shelf life ( It is the improved variety of tomato that has long shelf life and causing them to soften ).
D. Rosie cow            (i) Protein-enriched milk ( Rosie is the first transgenic cow produced human protein rich milk i.e; 2.4 g per litres containing alpha-lactalbumin) .

So, the correct option is 'Option A' . 
Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Transgenic plants are the ones

  1. Grown on artificial medium after hybridisation in the field

  2. Produced after protoplast fusion in artificial medium

  3. Produced by somatic embryo on artificial medium

  4. Generated by introducing foreign DNA into a cell and regenerating plant from that cell
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transgenic plants are defined by the stable integration of foreign DNA (transgenes) into their genome, which is then expressed in the plant cells.

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

The resistant variety of rice to bacterial blight is

  1. Jaya

  2. TMK-6

  3. IR-20

  4. IR-8
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Xanthomonas campestris causes bacterial blight of rice which is one of the most important diseases of rice in most of the rice-growing countries. Bacterial blight of rice has high epidemic potential and is destructive to high-yielding cultivars in both temperate and tropical regions especially in Asia.
  • IR8 is a high-yielding semi-dwarf rice variety developed by the International Rice Research Institute (IRRI) in the early 1960s. It is the resistant variety of rice to bacterial blight.
So, the correct answer is 'IR-8'