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Biotechnology and its Applications

AIPMT 2009MCQEasy📈 Topic in 75% papers+4−1
Ques. 1AIPMT 2009

What is antisense technology?

  1. RNA polymerase producing DNA
  2. Production of somaclonal variants in tissue cultures
  3. When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
  4. A cell displaying a foreign antigen used for synthesis of antigens

Answer

(3) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene

Solution

As per NCERT, RNA interference (RNAi) silences a specific mRNA by a complementary dsRNA molecule that binds to it and prevents its translation.

In antisense technology, an RNA strand complementary (antisense) to the mRNA of a gene is introduced.

It pairs with the mRNA, so the mRNA cannot be translated and the expression of that specific gene is stopped.

Answer: (3)

Keep practising — Biotechnology and its Applications

Ques. 2AIPMT 2008

Cry I endotoxins obtained from Bacillus thuringiensis are effective against:

  1. Mosquitoes
  2. Flies
  3. Nematodes
  4. Boll worms
Ques. 3AIPMT 2008

Main objective of production/use of herbicide resistant GM crops is to:

  1. eliminate weeds from the field without the use of manual labour
  2. eliminate weeds from the field without the use of herbicides
  3. encourage eco-friendly herbicides
  4. reduce herbicide accumulation in food articles for health safety
Ques. 4AIPMT 2008

Human insulin is being commercially produced from a transgenic species of:

  1. Escherichia
  2. Mycobacterium
  3. Rhizobium
  4. Saccharomyces
Ques. 5AIPMT 2008

A transgenic food crop which may help in solving the problem of night blindness in developing countries is

  1. Flavr Savr tomatoes
  2. Bt soybean
  3. Starlink maize
  4. Golden rice
Ques. 6AIPMT 2006

Golden rice is a promising transgenic crop. When released for cultivation, it will help in

  1. Herbicide tolerance
  2. Alleviation of vitamin A deficiency
  3. Producing a petrol-like fuel from rice
  4. Pest resistance
Ques. 7AIPMT 2005

Bacillus thuringiensis (Bt) strains have been used for designing novel -

  1. Bio-metallurgical techniques
  2. Biofertilizers
  3. Bioinsecticidal plants
  4. Bio-mineralization processes
Ques. 8AIPMT 2005

Golden rice is a transgenic crop of the future with the following improved trait -

  1. High lysine (essential amino acid) content
  2. High protein content
  3. Insect resistance
  4. High vitamin A content
Ques. 9AIPMT 2004

ELISA is used to detect viruses, where the key reagent is :-

  1. Catalase
  2. RNase
  3. DNA probes
  4. Alkaline phosphatase
Ques. 10AIPMT 2003

Maximum application of animal cell culture technology today is in the production of :-

  1. Interferons
  2. Vaccines
  3. Edible proteins
  4. Insulin
Ques. 11AIPMT 2003

ELISA is used to detect viruses, where the key reagent is :-

  1. Alkaline phosphatase
  2. RNase
  3. DNA probes
  4. Catalase

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