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IAS Previous Year Science & Tech Questions | Lecture 9 | Biotechnology Part-1

Q.1) Insect-resistant cotton plants have been genetically engineered by inserting a gene from a/an 

(a) virus

(b) bacterium

(c) insect

(d) Plant

Q.2) The American multinational company, Monsanfo, has produced an insect-resistant cotton variety that is undergoing field trials in India. A toxic gene from which one of the following bacteria has been transferred to this transgenic cotton? 

(a) Bacillus subtilis

(b) Bacillus thuringiensis

(c) Bacillus anyloliquifanciens

(d) Bacillus globlii

Q.3) Assertion (A) : Insect resistant transgenic cotton has been produced by inserting Bt gene.

Reason (R) : The Bt gene is derived from a bacterium. 

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not a correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Q.4) Mon 863 is a variety of maize. It was in the news for the following reason. 

(a) It is genetically modified dwarf variety which is resistant to drought

(b) It is a genetically modified variety which is pest resistant

(c) It is a genetically modified variety with ten times higher protein content than regular maize crop

(d) It is a genetically modified variety used exclusively for bio-fuel production

Q.5) With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements : 

  1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests.
  2. GM mustard has the genes that allow the plant cross-pollination and hybridization.
  3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University.

Which of the statements given above is/are correct ?

(a) 1 and 3 only

(b) 2 only

(c) 2 and 3 only

(d) 1, 2 and 3

Q.6) A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is 

(a) to make it pest-resistant.

(b) to improve its taste and nutritive qualities.

(c) to make it drought-resistant.

(d) to make its shelf-life longer.

Q.7) What are the reasons for the people’s resistance to the introduction of Bt brinjal in India? 

  1. Bt brinjal has been created by inserting a gene from a soil fungus into its genome.
  2. The seeds of Bt brinjal are terminator seeds and therefore, the farmers have to buy the seeds before every season from the seed companies.
  3. There is an apprehension that the consumption of Bt brinjal may have adverse impact on health.
  4. There is some concern that the introduction of Bt brinjal may have adverse effect on them biodiversity.

Select the correct answer using the codes given below :

(a) 1, 2 and 3 only

(b) 2 and 3 only

(c) 2, 3 and 4 only

(d) 1, 2, 3 and 4

Q.8) Genetically modified “golden rice” has been engineered to meet human nutritional requirements. Which one of the following statements best qualifies golden rice ? 

(a) The grains have been fortified with genes to provide three times higher grain yield per acre than other high yielding varieties

(b) Its grains contain pro-vitamin A which upon ingestion is converted to vitamin A in the human body

(c) Its modified genes cause the synthesis of all the nine essential amino acids

(d) Its modified genes cause the fortification of its grains with vitamin D.

Q.9) Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to 

  1. resist drought and increase absorptive area
  2. tolerate extremes of pH
  3. resist disease infestation

Select the correct answer using the codes given below.

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Q.10) Assertion (A) : Dolly was the first cloned mammal.

    Reason (R) : Dolly was produced by in vitro fertilization. 

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not a correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Q.11) 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. [2000]

Codes:

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not a correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Q.12) Which one of the following techniques can be used to establish the paternity of a child? [1997]

(a) Protein analysis

(b) Chromosome counting

(c) Quantitative analysis of DNA

(d) DNA finger printing

Q.13) Which one of the following techniques can be used to establish the paternity of a child? [1997]

(a) Protein analysis

(b) Chromosome counting

(c) Quantitative analysis of DNA

(d) DNA finger printing

Q.14) Which of the following professional(s) are more likely to run the risk of a permanent change in their cell’s DNA? [1996]

  1. Researchers using Carbon 14 isotope
  2. X-ray technician
  3. Coal miner
  4. Dyer and painter

Select the correct answer by using the codes given below

Codes:

(a) 2 alone

(b) 1 , 2 and 3

(c) 1, 2 and 4

(d) 1, 3 and 4

Do it yourself

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