Tag: biotechnology in agriculture

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Multiple choice botany option b: biotechnology and bioinformatics biotechnology in agriculture gm crops transgenic organisms

Which of the following is correctly matched?

  1. Agrobacterium tumefaciens- Tumour

  2. pBR 322- Enzyme

  3. Thermus aquaticus- Bt gene

  4. Ligase- Molecular scissors

  5. Hind II- Plasmid vector
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Agrobacterium tumefaciens contains a Ti plasmid that causes crown gall disease (tumors) in plants. Other options are incorrectly matched; for example, Hind II is a restriction enzyme, not a vector.

Multiple choice botany option b: biotechnology and bioinformatics biotechnology in agriculture gm crops transgenic organisms

Pathogenic entity that is responsible for the production of tumour in most dicot plants is

  1. Retrovirus

  2. Bacteriophage

  3. Ti plasmid

  4. Vector
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Agrobacterium is a genus of Gram-negative bacteria that causes tumors in plants. Agrobacterium tumefaciens is the most commonly studied species in this genus. It contains "Ti" plasmid or tumor inducing plasmid, that causes  crown-gall disease in plants. The disease is characterised by a tumour-like growth or gall on the infected plant, often at the junction between the root and the shoot. Tumors are incited by the conjugative transfer of a DNA segment (T-DNA) from the bacterial tumour-inducing (Ti) plasmid to the plant cell naturally when the bacterium infects the plant through  a wound.


So, the correct answer is 'Ti plasmid'

Multiple choice botany option b: biotechnology and bioinformatics biotechnology in agriculture gm crops transgenic organisms

Diseases like malaria and filariasis are transmitted through insect vectors .Vectors can be controlled by introducing fish

  1. Labeo

  2. Gambusia

  3. Hilsa

  4. Catla
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gambusia is a larvivorous fish used as a biological control agent to eat mosquito larvae, thereby reducing the transmission of diseases like malaria.

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' .