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Biotechnology and its Applications · Question 65

AIPMT 2008MCQEasy📈 Topic in 75% papers+4−1
1

Cry I endotoxins obtained from Bacillus thuringiensis are effective against:

  1. Mosquitoes
  2. Flies
  3. Nematodes
  4. Boll worms

Answer

(4) Boll worms

Solution

⇒ As per NCERT, the toxin is coded by a gene named cry; the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms (lepidopterans), while that of cryIAb controls the corn borer.

⇒ Cry I endotoxins thus act on lepidopteran larvae; flies and mosquitoes (dipterans) are controlled by other Cry proteins, and nematodes are controlled by RNA interference.

∴ Cry I endotoxins are effective against boll worms.

Answer: (4)

AIPMT 2008

Keep practising — Biotechnology and its Applications

2

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
AIPMT 2008
3

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

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

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
AIPMT 2008
5

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
AIPMT 2006
6

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

  1. Bio-metallurgical techniques
  2. Biofertilizers
  3. Bioinsecticidal plants
  4. Bio-mineralization processes
AIPMT 2005
7

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
AIPMT 2005
8

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

  1. Catalase
  2. RNase
  3. DNA probes
  4. Alkaline phosphatase
AIPMT 2004
9

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

  1. Interferons
  2. Vaccines
  3. Edible proteins
  4. Insulin
AIPMT 2003
10

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

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

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