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Biotechnology & Genetics

56 questions in Science & Technology.

Asked in 2011, 2010, 2009, 2002, 2001, 2000, 1999

2011 · Q5Science & TechnologyBiotechnology & Geneticsmoderate

At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us? 1. It is possible to know the pedigree of livestock. 2. It is possible to understand the causes of all human diseases. 3. It is possible to develop disease-resistant animal breeds. Which of the statements given above is/are correct?

  1. (a)1 and 2 only
  2. (b)2 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(c) 1 and 3 only

2011 · Q65Science & TechnologyBiotechnology & Geneticseasy

Recently, ‘oilzapper’ was in the news. What is it?

  1. (a)It is an eco-friendly technology for the remediation of oily sludge and oil spills
  2. (b)It is the latest technology developed for under sea oil exploration
  3. (c)It is a genetically engineered high biofuel yielding maize variety
  4. (d)It is the latest technology to control the accidentally caused fires in oil wells
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Official answer(a) It is an eco-friendly technology for the remediation of oily sludge and oil spills

2010 · Q5Science & TechnologyBiotechnology & Geneticsmoderate

Mon 863 is a variety of maize. It was in the news for the following reason

  1. (a)It is a genetically modified dwarf variety which is resistant to drought
  2. (b)It is a genetically modified variety which is pest resistant
  3. (c)It is a genetically modified variety with ten times higher protein content than regular maize crop
  4. (d)It is a genetically modified variety used exclusively for bio-fuel production
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Official answer(b) It is a genetically modified variety which is pest resistant

2010 · Q8Science & TechnologyBiotechnology & Geneticseasy

Genetically modified “golden rice” has been engineered to meet human nutritional requirements. Which one of the following statements best qualifies golden rice?

  1. (a)The grains have been fortified with genes to provide three times higher grain yield per acre than other high yielding varieties
  2. (b)Its grains contain pro-vitamin A which upon ingestion is converted to vitamin A in the human body
  3. (c)Its modified genes cause the synthesis of all the nine essential amino acids
  4. (d)Its modified genes cause the fortification of its grains with vitamin D
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Official answer(b) Its grains contain pro-vitamin A which upon ingestion is converted to vitamin A in the human body

2010 · Q58Science & TechnologyBiotechnology & Geneticseasy

Which feature of some species of blue-green algae helps promote them as bio-fertilizers ?

  1. (a)They convert atmospheric methane into ammonia which the crop plants can absorb readily.
  2. (b)They induce the crop plants to produce the enzymes which help convert atmospheric nitrogen to nitrates.
  3. (c)They have the mechanism to convert atmospheric nitrogen into a form that the crop plants can absorb readily.
  4. (d)They induce the roots of the crop plants to absorb the soil nitrates in larger quantities.
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Official answer(c) They have the mechanism to convert atmospheric nitrogen into a form that the crop plants can absorb readily.

2009 · Q69Science & TechnologyBiotechnology & Geneticsmoderate

In the context of genetic disorders, consider the following: A woman suffers from colour blindness while her husband does not suffer from it. They have a son and a daughter. In this context, which one of the following statements is most probably correct ?

  1. (a)Both children suffer from colour blindness
  2. (b)Daughter suffers from colour blindness while son does not suffer from it
  3. (c)Both children do not suffer from colour blindness
  4. (d)Son suffers from colour blindness while daughter does not suffer from it
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Official answer(d) Son suffers from colour blindness while daughter does not suffer from it

2002 · Q7Science & TechnologyBiotechnology & Geneticsmoderate

With reference to the latest developments in stem-cell research, consider the following statements: 1. The only source of human stem cells are the embryos at blastocyst stage. 2. The stem cells can be derived without causing destruction to blastocysts. 3. The stem cells can regenerate themselves in vitro virtually forever. 4. Indian research centres also created a few cell lines which can be developed into many types of tissues. Which of these statements are correct?

  1. (a)1, 2, 3 and 4
  2. (b)1, 2 and 3
  3. (c)1, 2 and 4
  4. (d)3 and 4
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Official answer(d) 3 and 4

2001 · Q124Science & TechnologyBiotechnology & Geneticsmoderate

Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules. Reason (R): DNA fragments can be manipulated using restriction endonucleases and DNA ligases. Which of the following is correct?

  1. (a)Both A and R are individually true and R is the correct explanation of A
  2. (b)Both A and R are individually true but R is NOT a correct explanation of A
  3. (c)A is true but R is false
  4. (d)A is false but R is true
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Official answer(a) Both A and R are individually true and R is the correct explanation of A

2000 · Q128Science & TechnologyBiotechnology & Geneticsmoderate

Assertion (A): “DNA Finger-printing” has become a powerful tool to establish paternity and identity of criminals in rape and assault cases. Reason (R): Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis.

  1. (a)Both A and R are true, and R is the correct explanation of A
  2. (b)Both A and R are true, but R is not a correct explanation of A
  3. (c)A is true, but R is false
  4. (d)A is false, but R is true
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Official answer(a) Both A and R are true, and R is the correct explanation of A